Baltimore Aircoil Company
Contact: David White
7600 Dorsey Run Road
Jessup, MD 20794
Phone: 410-799-6291
Fax: 410-799-6405

Baltimore County Government
Contact: Virginia Story
Training Division
Office of Human Resources
308 Allegheny Avenue
Towson, MD 20204
Phone: 410-887-8714
Fax: 410-821-5537

Barton & Loguidice, D.P.C.
Contact: Byron Raych, P.E.
433 Electronics Parkway
Liverpool, NY 13088
Phone: 518-218-1801
Fax: 518-218-1805

BASF, The Chemical Company
Contact: Rodney Meyers
29 Brett Manor Court
Hunt Valley, MD 21030
Phone: 443-326-0113

Boland
Contact: Kristine Platt
30 West Watkins Mill Road
Gaithersburg, MD 20878
Phone: 240-380-0822
Fax: 240-306-3501

Brainfiller, inc.
Contact: Jessica Phillips
PO Box 12024
Scottsdale, AZ 85267
Phone: 480-275-7451
Fax: 480-275-2496

Brudis & Associates, Inc.
Contact: Katie Grabenstein
11000 Broken Land Parkway
Suite 450
Columbia, MD 21044
Phone: 410-887-3607 Ext. 258

Building Codes Administration, Maryland Department of Labor
Contact: Norman Wang
1100 N. Eutaw Street, Room 606
Baltimore, MD 21201
Phone: 410-767-0548
Fax: 410-767-2986

Building Envelope Science Institute, Inc.
Contact: Spiderman Mulholland
7257 Northwest, 4th Boulevard, Suite 178
Gainesville, FL 32606
Phone: 877-688-2374
Fax: 321-244-0228

BWB – Business Writing At Its Best, Inc.
Contact: Lynne Agress, Ph.D.
13 Chiara Court
Baltimore, MD 21204-2720
Phone: 410-823-0826

Capitol Power Group, LLC
Contact: Matt Groom
20365 Exchange Street, Suite 240
Ashburn, VA 20147
Phone: 240-393-5045
Fax: 703-726-9727

CaptiveAire Systems, Inc.
Contact: Kelly Drose
4641 Paragon Park Road
Raleigh, NC 27616
Phone: 615-406-1316
Fax: 919-227-5941

CE Education, LLC
Contact: Kristina Petrandis
2279 Creel Trail
Tallahassee, FL 23211
Phone: 850-210-1000
Fax: 850-224-8200

CentreStar Academy
Contact: Dr. Wesley E. Donahue
200 Innovation Boulevard, Suite 252
State College, PA 16803
Phone: 811-231-0618
Fax: 814-231-0755

Certified Training Institute
Contact: Cassandra Estelle
3135 Logan Valley Road
Traverse City, MI 49684
Phone: 800-727-7104
Fax: 517-827-4901

CEU Leaf, LLC
Contact: Joe Angelo
Post Office Box 309
Canfield, OH 44406
Phone: 866-696-6993

Chemworks, Inc.
Contact: Isabelle Laurier
31 George Street
Newton, MA 02458
Phone: 718-522-6762
Fax: 718-522-6703

Chesapeake Section
American Water Works Association
Contact: Rachel Ellis
11510 Greenspring Avenue
Lutherville, MD 21092
Phone: 443-924-4671

Chesapeake Systems
Contact: Tyler Lee
7400 Coca-Cola Drive
Hanover, MD 21076
Phone: 443-561-1600
Fax: 443-561-1601

Chesapeake Water Environment Association
Contact: Paul Sayan
Chesapeake Section
Post Office Box 196
Butler, MD 21023
Phone: 410-926-9612

CivilTraining, LLC
Contact: John Cooke
5300 Wellington Branch Drive, Suite 100
Gainesville, VA 20155
Phone: 732-869-0592
Fax: 732-377-5454

Clark Construction Group, LLC
Contact: Todd McQuinn
7500 Old Georgetown Road
Bethesda, MD 20814
Phone: 301-272-8344
Fax: 301-272-6987

Cognistar
Contact: Shari Corporan
5000 Arlington Center Boulevard
Building #2, Suite 2128
Arlington, OH 43220
Phone: 614-636-3737
Fax: 800-886-4685

Colliers Engineering & Design, Inc.
Contact: Christina Urciuoli
331 Newman Springs Road, Suite 203
Red Bank, NJ 07701
Phone: 732-383-1950
Fax: 732-383-1974

Contech Engineered Solutions
Contact: Jeff Van Osdel
605 Global Way, Suite 113
Linthicum, MD 21090
Phone: 443-878-5487
Fax: 410-740-8492

Continuing Education and Development, Inc
dba CED Engineering
Contact: Gilbert Gedeon, P.E.
22 Stonewall Court
Woodcliff Lake, NJ 07677
Phone: 877-322-5800
Fax 877-322-4774

Contract Solutions Group, Inc.
Contact: Ronald Leaders
9330 Southwest, 216th Street
Vashon, WA 98070
Phone: 206-463-7487
Fax: 206-463-7488

Convergent Technologies Design Group, Inc.
6501 York Road
Baltimore, MD 21212
Phone: 410-532-2395
Fax: 410-532-2396
Contact: Bill Holaday

Cooney Technologies
Contact: Caitlin Buglione
20130 Valley Forge Circle
King of Prussia, PA 19406
Phone: 610-783-1136
Fax: 610-783-1139

Core and Main
Contact: William Maier
1830 Craig Park Court
St. Louis, MO 63146
Phone: 609-405-6623

Courses Provider
Contact: Dr. Annalingam Anandarajah
13719 Killarney Court
Phoenix, MD 21131 
Phone: 410-499-6387

Critical Systems, LLC
Contact: Jeff Akin
12216 Parklawn Drive
Suite 201
Rockville, MD 20852
Phone: 502-541-2787
Fax: 866-400-0750

Cultec, Inc
2549 Hillcrest Avenue
East Norriton, PA 19401
Phone: 484-636-7384
Contact: Christopher Bucci

Cummins Powers Systems, LLC
Contact: Phonsavanh (Pon) Phithaksounthone
2727 Ford Road
Bristol, PA 19007
Phone:719-502-1221
Fax: 718-892-0055

Cummins-Wagner Co., Inc.
Contact: Will Dargan
10901 Pump House Road
Annapolis Junction, MD 20701
Phone: 301-953-9370
Fax: 301-490-7156

CV, Inc.
610 Professional Drive
Suite 108
Gaithersburg, MD 20879
Phone: 301-367-2510 Ext. 200
Contact: Chinmay Vyas

Cyborg Management Group, Inc.
Contact: Nageshwarreddy V. Karnati
13607 Little Hayden Circle
Hagerstown, MD 21742
Phone: 301-331-7212

Decatur Professional Development, LLC
dba PDHengineer
Contact: Ken Hudspeth
1431 Graham Drive,
Suite 262,
Tomball, TX 77375
Phone: 1-877-PDHengineer (877-734-3644) or 281-671-1615
Fax: 281-676-3633

Delaware Technical Community College
Contact: Hilary Valentine
18800 Seashore Highway
Post Office Box 610
Georgetown, DE 19947
Phone: 302-855-5904
Fax: 302-858-5459

DiscountPDH.com
Contact: Franco Davati, P.E.
2500 Tanglewilde, Suite 220
Houston, TX 77063
Phone: 713-787-6810
Fax: 713-787-6825

Dlubal Software, Inc.
Contact: Amy Heilig
30 South 15th Street, 15th Floor
Philadelphia, PA 19102
Phone: 267-702-2815

Dr. Michael J. Casey
Contact: Michael J. Casey
1271 Maple Avenue
Halethorpe, MD 21227
Phone: 443-297-9330

Dylan Drudul
Contact: Dylan Drudul
1405 Benson Court, Suite D
Arbutus, MD 21227
Phone: 301-252-5537
Fax: 443-304-3315

D.S. Thaler & Associates, Inc.
Contact: David S. Thaler
7115 Ambassador Road
Post Office Box 47428
Baltimore, MD 21244-7428
Phone: 410-944-3684
Fax: 410-944-3684

EA Engineering, Science, and Technology, Inc.
Contact: Lisa Page
225 Schilling Circle
Hunt Valley, MD 21031
Phone: 410-527-2480
Fax: 410-771-1780

Earth Anchoring Suppliers, LLC
Contact: Alex Rapose
19 Trention-Lakewood Road
Clarksburg, NJ 08510
Phone: 732-747-7222
Fax: 732-732-4434

EBTRON, Inc.
Contact: Len Damiano
1663 Highway 701 South
Loris, SC 29569
Phone: 800-232-8766
Fax: 843-756-1838

EduMind, Inc.
Contact: Ashley Wilkinson
425 Metro Place North, Suite 450
Dublin, OH 43017
Phone: 614-873-7475
Fax: 614-873-7476

Edwin Lee Smith
1020 Boyd Street
Baltimore, MD 21223

Efficient Air Systems, Inc.
Contact: Ray Hickey
10 Elm Street
PO Box 405
Gorham, ME 04038
Phone: 315-920-0815
Fax: 207-839-6335

e-Hazard Management LLC
Contact: Elisa Sellars
3018 Eastpoint Parkway
Louisville, KY 40223
Phone: 502-716-7073

EJ USA, Inc.
Contact: Craig Coggins
4725 W. Western Reserve Road
Canfield, OH 44406
Phone: 330-717-1528

Engineer Educators, Inc.
Contact: Ryan Malone
7100 N Driftwood Ave
Farmington, NM 87402
Phone: 833-734-6699

Engineered Software, Inc.
Contact: Jeffrey Sines
4529 Intelco Loop, Southeast
Lacey, WA 98503
Phone: 360-292-4060
Fax: 360-412-0672

Engineering Planning and Management, Inc.
Contact: Ron Melucci
959 Concord Street
Framingham, MA 01701
Phone: 508-532-7151
Fax: 508 879-3291

Engineering-PDH.com (PDH Resources, LLC)
Contact: Troy Heidenbrand
537 Cajundome Boulevard
Suite 111
Lafayette, LA 70506
Phone: 1-833-364-7734
Fax: 337-223-4721

Environmental Research and Education Foundation
Contact: Cristina Virdisa
3301 Benson Drive, Suite 301
Raleigh, NC 27609
Phone: 919-861-6876 ext 106

Erin Gallimore Worldwide
Contact: Erin Gallimore
3908 Hemsbury Way
Raleigh, NC 27612
Phone: 919-606-5734

Ernest Maier
Contact: Aaron Fisher
4700 Annapolis Road
Bladensburg, MD 20710
Phone: 202-510-5545

Expert PDH, LLC
Contact: Mark A. Strain
7720 Summerlake Pointe Blvd
Winter Garden, FL 34787
Phone: 913-727-5758

EZpdh.com
Contact: Raymond Bosek
3594 Casalta Circle
New Smyrna Beach, FL 32168
Phone: 386-689-2170

Fabco Industries, Inc.
Contact: Warren Cohn, CPESC, CPSWQ
24 Central Drive
Farmingdale, NY 11735
Phone: 484-689-1113

Federated Controls
Contact: Brad Hartman
16000 Trade Zone Avenue, Suite 301
Upper Marlboro, MD 20774
Phone: 240-997-2019
Fax: 301-249-1963

Filtrex Corporation
Contact: Stephen Goss
806 Race Road
Baltimore, MD 21221
Phone: 410-686-8600
Fax: 410-686-8600

FirstEnergy Corp.
Contact: Reneé Iovine
76 South Main Street
Akron, OH 44304
Phone: 330-761-4137

Geomatics Workshops
Contact: Bill Tingle
13130 Graymist Drive
Charlotte, NC 28215
Phone: 704-756-1491
Fax: 704-545-6714

Geosyntec Consultants, Inc.
Contact: Carrie Pendleton
10211 Wincopin Circle, Floor 4
Columbia, MD 21044
Phone: 410-381-4333
Fax: 410-381-4499

Geo-Technology Associates, Inc.
Contact: Meghan Lester
18 Boulden Circle, Suite 36
New Castle, DE 19720
Phone: 302-326-2100

GHD, Inc.
Contact: Jennifer Carney
8924 Yellow Brick Road
Rosedale, MD 21237
Phone: 410-682-2660
Fax: 410-682-4750
Fax: 315-679-5853

Gieger Pump and Equipment Company
Contact: Irene Pais
16701 Melford Boulevard, Suite 220
Bowie, MD 20715
Phone: 315-679-5853
Fax: 315-679-5853

Gillespie Precast
Contact: Steven Wilcox
P.O. Box 450
Chestertown, MD 21620
Phone: 410-778-0940 Ext. 31
Fax: 410-758-0361

Global PDH, LLC
Contact: Brandon Ozmore
PO Box 489
Riverview, FL 33568
Phone: 800-460-4110
Fax: 813-343-8701

Good Earthkeeping Organization, Inc.
dba GEO, Inc.
Contact: Heather Annette Castner
1612 Jenks Drive
Corona, CA 92880
Phone: 714-561-0166
Fax: 714-283-1682

Green Building Education Services
Contact: Yvonne Byars
8607 Glenridge Drive, Suite 250
Atlanta, GA 30342
Phone: 888-414-9998

Greenheck Fan Corporation
Contact: Tim Kuski
Post Office Box 0410
Schofield, WI 54476-0410
Phone: 715-355-6646
Fax: 715-355-2232

Green Roofs for Healthy Cities
Contact: Emma Tamln
406 King Street, East
Toronto, Ontario M5A 1L4
Phone: 1-416-971-4494 ext. 221

GreenSeam Industries
Contact: Samuel Bratton
210 Fifth Street
Charleroi, PA 15022
Phone: 317-775-5601

Haag Education, LLC
Contact: Erin Flack
4949 West, Royal Lane
Irving, TX 75063
Phone: 214-614-6559
Fax: 214-614-6501

HalfMoon Education, Inc.
Contact: Frank Chapman
Post Office Box 278
Altoona, WI 54720.
5828 Arndt Lane,
Eau Claire, WI 54701
Phone: 715-835-5900
Fax: 715-835-6066

Hardesty & Hanover, LLC
Contact: David Tuckman
1501 Broadway, 6th Floor
New York, NY 10036
Phone: 646-428-8489

Harsco Industrial Patterson-Kelley
Contact: Ruth Ann Rocchio
155 Burson Street
East Stroudsburg, PA 18301
Phone: 570-476-7262
Fax: 570-476-7247

Havtech, Inc.
Contact: Joe Roetering
9505 Berger Road
Columbia, MD 21046
Phone: 301-206-9225
Fax: 301-497-9610

Hayward Baker Geotechnical Construction
1875 Mayfield Road
Odenton, MD 21113
Phone: 410-551-1980
Fax: 410-551-8206

Highland Tank and Mfg.
Contact: William Osborne
4535 Elizabethtown Road
Manheim, PA 17545
Phone: 717-368-3779

Home Prep-A Division of Stautzenberger College
Contact: Joshua Purvis
900 East Hill Avenue, Suite 380
Knoxville, TN 37915
Phone: 800-952-0910
Fax: 800-531-8906

Honeywell Analytics
Contact: Rich Banducci
405 Barclay Boulevard
Lincolnshire, IL 60069
Phone: 847-955-8460
Fax: 847-572-1670

Howard County MD
Contact: Jeffrey Dannis
6751 Columbia Gateway Drive
Columbia, MD 21046
Phone: 410-313-6419
Fax: 410-313-6490

Hydraulic Institute
Contact: Mark Sullivan
6 Campus Drive, First Floor
North Parsippany, NJ 07054-4406
Phone: 973-267-9700
Fax: 973-267-9055

ICD High Performance Coatings + Chemistries
Contact: Michaela Cloyd
7530 S. Union Ridge Parkway
Ridgefield, WA 98642
Phone: 360-546-2286
Fax: 360-546-2287

IMI Hydronic Engineering
Contact: Soham Neupane
8908 Governors Row
Dallas, TX 75247
Phone: 469-347-4696

InfraMap Corp
Contact: Kenneth Kerr
92 North Main Street, Building 19E
Windsor, NJ 08561
Phone: 609-371-5420
Fax: 609-371-5423

Institute for Design Professionals, LLC
Contact: Ann Marie Schreiber
Post Office Box 129
Manlius, NY 13104
Phone: 315-682-1496
Fax: 315-682-1571

Intelligent Transportation Society of Maryland, Inc.
Contact: Keith Riniker
University of Maryland T2 Center, Building 806
Technology Ventures Building, Suite 2206
College Park, MD 20742
Phone: 443-741-3675

Jacobs Solutions
Contact: Charles Funk
1999 Bryan Street
Suite 3500
Dallas, TX 75201
Phone: 864-384-3261

JADE Learning
207 W. Millbrook Road, Suite 115
Contact: Naomi Yencich
Raleigh, NC 27609
Phone: 1-800-443-5233
Fax: 919-781-4595

Jensen Hughes, Inc.
Contact: Brian Oakes
3610 Commerce Drive
Suite 817
Baltimore, MD 21227
Phone: 800-930-9414

Jet Filter Systems, LLC
Contact: Representative
3101 E. Main Street
PO Box 31
Casey, IL 62420
Phone: 800-475-2029
Fax: 800-475-2136

The Joyce Agency
Contact: Lindsay Nguyen
3933 Avion Park Court
Suite B102B
Chantilly, VA 20151
Phone: 703-712-2101

Johnson Controls
Contact: Steve Lauer
60 Loveton Circle
Sparks, MD 21152
Phone: 410-527-2681
Fax 410-527-2730

Johnson Controls c/o Gracone LLC
Contact: Chris Army
7915 Cypress Creek Pkwy #130
Houston, TX 77070
Phone: 470-258-4298

Johnson, Mirmiran & Thompson
Contact: Kristyn Barnes
40 Wight Avenue
Hunt Valley, MD 21030
Phone: 410-316-2306

JTJ Engineers, LLC
Contact: James T Johnson
30856 Molly B Road
Lewes, DE 19958
Phone: 302-542-2949

Kelvion, Inc.
Contact: Chris Zapp
3100 Farmtrail Road
York, PA 17406
Phone: 717-268-6200

Keystone Retaining Wall Systems, LLC
Contact: Daniel Tix
4444 West 78th Street
Minneapolis, MN 55435
Phone: 952-897-1040
Fax: 952-897-3858

Kibart, Inc.
Contact: P. Edwin Abbott, Jr.
901 Dulaney Valley Road, Suite 301
Towson, MD 21204
Phone: 410-494-1111
Fax: 410-494-1112

Kimley-Horn and Associates, Inc.
Contact: Catherine Provost
421 Fayetteville Street, Suite 600
Raleigh, NC 27601
Phone: 919-653-5840
Fax: 919-677-2050

Kinetic Research Corporation
Contact: James M Haughton
601 Teal Street
Chester, MD 21619
Phone: 410-991-2582

Klein Agency, LLC
Contact: Justin Klein
PO Box 219
Timonium, MD 21094
Phone: 410-832-7600
Fax: 410-832-1849

Kohler Power Systems
Contact: Karla Wood
444 Highland Drive
Mail Stop 079
Kohler, WI 53044
Phone: 920-980-1823

Krannich Solar Training
Contact: Dessie Kirilova
7000 Commercial Parkway, Suite A
Mt. Laurel, NJ 08054
Phone: 856-802-0991
Fax 856-380-0739

KYPipe, LLC
Contact: Jana Faith
3229 Brighton Place
Lexington, KY 40509
Phone: 812-843-4145

Lane Enterprises, Inc.
Contact: Tim Lang
3905 Hartzdale Drive
Camp Hill, PA 17100
Phone: 607-661-7138
Fax: 717-761-5055

Leach Wallace Associates, Inc.
Contact: David D. Brackett
6522 Meadowridge Road
Elkridge, MD 20175
Phone: 410-579-8100
Fax: 410-540-9041

LearnFormula, Inc.
Contact: Mike Katsevman
8171 Tonge Street, Suite 365
Thornhill, ON
L3T 2C6, Canada
Phone: 416-829-2103

Lee & McShane, PC
Contact: Terrence M. McShane
1211 Connecticut Avenue, Northwest, Suite 425
Washington, DC 20036
Phone: 202-530-8100
Fax: 202-530-0402

Life Cycle Engineering
Contact: Education
4360 Corporate Road
Charleston, SC 29405
Phone: 843-744-7110
Fax: 843-308-9472

Limberger Associates, Inc.
Contact: Edwin Limberger
1402 Limetree Court
Silver Spring, MD 20904-1480
Phone: 301-332-5681
Fax: 301-680-9559

LMK Technologies
Contact: Amanda Limones
1779 Chessie Lane
Ottawa, IL 61530
Phone: 815-433-1275
Fax: 815-433-0107

Lorman Education Services
Contact: Michelle Shepherd
2510 Alpine Road
Post Office Box 509
Eau Claire, WI 54702-0509
Phone: 715-833-3940
Fax: 715-855-7079

Low Impact Development Center, Inc.
Contact: Neil Weinstein
5000 Sunnyside Avenue, Suite 100
Beltsville, MD 20705
Phone: 301-982-5559
Fax: 301-982-9305

LTK Engineering Services
Contact: Robert G. Schwab, P.E.
100 West, Butler Avenue
Ambler, PA 19002
Phone: 215-641-8888
Fax: 215-643-2720

Luck Ecosystems
Contact: Kateri Shreve
Post Office Box 29682
Richmond, VA 23242-0682
Phone: 804-385-1486

The Lubrizol Corporation
Contact: Jonathan Simon
9911 Brecksville Road
Brecksville, OH 44141
Phone: 216-447-5452

Mabey, Inc
Contact: Douglas C. Brunot
6770 Dorsey Road
Elkridge, MD 21075
Phone: 410-567-1959
Fax: 410-379-2801

Marc R. Hurwitz, P.E., NSPE, LEED AP BD+C
Contact: Marc Hurwitz
PO Box 471
Reisterstown, MD 21136
Phone: 410-415-3055

Martin Schumacher, M.S. Electrical Training, LLC
Contact: Marty Schumacher
2023 Meadow Drive
Westminster, MD 21158
Phone: 410-790-8993

Maryland Association of Municipal Wastewater Agencies
c/o Washington Suburban Sanitary Commission
Contact: Joel Caudill
14501 Switzer Lane
Laurel, MD 20707
Phone: 301-206-7008

MD Building Officials Association
Contact: Dan DiVito
Post Office Box 266
Glen Burnie, MD 21061
Phone: 301-992-3242
Fax 240-313-2601

Maryland Onsite Wastewater Professionals Association (MOWPA)
Contact: Rachel Flatley
Post Office Box 2570
Ellicott City, MD 21041
Phone: 443-570-2029
Fax 443-267-0098

Maryland Society of Surveyors
Contact: John Palatiello
1856 Old Reston Avenue, Suite 205
Reston, VA 20190
Phone: 800-303-6770
Fax: 844-878-4973

Maryland State Highway Administration
Contact: Kayode Adenaiya
7491 Connelley Drive
Hanover, MD 20176
Phone: 410-787-5864
Fax: 410-582-9469

Maser Consulting, P.A.
Contact: Christina Urciuoli
331 Newman Springs Road, Suite 203
Red Bank, NJ 07701
Phone: 732-383-1950

Masonry Solutions International, Inc.
Contact: Andy Markopoulos
10815 Beaver Dam Road, Suite D
Cockeysville, MD 22030
Phone: 410-771-1922
Fax: 410-771-1942

McKissock, LP
Contact: Tracey Foster
18 Liberty Street
Warren, PA 16365
Phone: 877-801-8376

Menard Group USA
Contact: Greg Simmons
4540 Crain Highway #270
Bowie, MD 20716
Phone: 301-318-1719

Michael J. Schreiber, ASLA
Contact: Michael J. Schreiber
7035 South, Sentinel Lane
York, PA 17403
Phone: 443-794-7684

Midwest GeoSciences Group
Contact: Daniel Kelleher
1950 East Greyhould Pass
Suite 18
Carmel, IN 46033
Phone: 763-607-0092

MIRATECH Corporation
Contact: Stewart Matson
420 South 145th East Avenue, Mail Drop A
Tulsa, OK 74108
Phone: 918-574-1374
Fax: 918-933-6245

Modern Welding Company, Inc.
Contact: Robert Holland
Post Office Box 4430
Newark, OH 43058-4430
Phone:740-504-4022
Fax: 740-344-6018

The Morin Company, LLC
Contact: Kevin Morin
9305 Gerwig Lane, Suite V-Y
Columbia, MD 21046
Phone: 301-953-7770
Fax: 301-498-4870

Moatassem Ghoniema, Ph.D, PMP, PSP
Contact: Katrina Lyles
14405 Laurel Place, Suite 318
Laurel, MD 20707
Phone: 301-765-4270

Mott MacDonald
Contact: Brian C. Aylaian, P.E.
111 Wood Avenue South
Islelin, NJ 08830
Phone: 443-541-5079

Mypdh LLC
Contact: Vincent Bosek
1648 Taylor Road #257
Port Orange, FL 32128
Phone: 800-495-3302

National Precast Concrete Association (NPCA)
Contact: Marti Harrell
1320 City Center Drive
Carmel, IN 46032
Phone: 317-571-9500
Fax 317-571-0041

Ncite Engineering Hub, LLC
Contact: Hisham N. Asur, Ph.D.
Post Office Box 981
Charlottesville, VA 22902
Phone: 434-882-6326

NewMedian, LLC
Contact: Rachel Quartararo
1525 North Alvarado Street, #36097
Los Angeles, CA 90026
Phone: 828-450-7490

Neenah Foundry
Contact: Amanda Allsbrook
2121Brooks Avenue
Neenah, WI 54956
Phone: 919-946-1141

N. H. Yates and Co., Inc.
Contact: Tara Giordano
117C Chruch Lane
Cockeysville, MD 21010
Phone: 410-667-6300
Fax: 410-667-9201

Nobis Engineering
Contact: Boris Gamazaychikov
20410 Century Bouledard, Suite 23
Germantown, MD 20874
Phone: 301-528-2010
Fax: 301-528-0124

Nortec
Contact: Kendall Brant
2740 Fenton Road
Ottawa, Ontario K1T3T7
Phone: 952-452-2518

North American Green
A Tensar International Company
Contact: Michael Close
821 Yates Court
Boiling Springs, SC 29316
Phone: 864-764-9690

Online Engineering Education, Inc.
Contact: Dr. Omar Elsherif
7 Lee Place
Paterson, NJ 07505
Phone: 973-523-9900
Fax: 973-742-1818

Online-PDH
Contact: Donald W. Parnell, PE
1265 San Juan Drive
Merritt Island, FL 32952
Phone: 321-501-5601

Paver Guide, Inc.
Contact: Jason Schmidt
2193 Stewart Drive
Fallston, MD 21047
Phone: 866-270-7280

PDH Academy
Contact: Steve Preins
Post Office Box 449
Pewaukee, WI 53072
Phone: 888-564-9098

PDH Made Simple
Contact: Michael J. Dickey, P.E.
333 Wallace Street, #71
Combined Locks, WI 54113
Phone: 855-632-5800

PDHNow.com
Contact: Ryan Malone
7100 N Driftwood Ave
Farmington, NM 87402
Phone: 833-734-6699

PDHonline.org, Inc.
Contact: John C. Huang, Ph.D., P.E.
5272 Meadow Estates Drive
Fairfax, VA 22030
Phone: 703-988-0088
Fax: 703-988-0088

PDH Pro, Inc.
Contact: Administrator
396 Washington Street, Suite 153
Wellesley, MA 02481
Phone: 508-298-4787

PDH Star (MZI Consulting LLC, dba PDH Star)
Contact: Zorana Jelic
211 W. 106th Street, #14A
New York, NY 10025
Phone: 833-734-7827
Fax: 833-734-7827

PDHLibrary.com | Southard Engineering, Inc. 
Contact: John Southard
4566B Northwest, 5th Blvd.
Gainesville, FL 32609
Phone/Fax: 352-367-2526

PDH365.com 
Contact: Ellen Huang
1101 Ludlow Street, Unit 1610
Philadelphia, PA 19017
Phone: 571-484-4993

Pepco Holdings, An Exelon Company
Contact: Darius Parker
701 Ninth Street, NW
Washington, DC 20068
Phone: 202-388-2780

Pile Driving Contractors Association
Contact: Marian McMillin
33 Knight Boxx Road, Suite 1
Orange Park, FL 32065
Phone: 904-215-2977
Fax: 904-215-2977

Pile Dynamics, Inc.
Contact: Shannon Theodore
30725 Aurora Road
Cleveland, OH 44139
Phone: 216-831-6131
Fax: 216-8231-9161

Power Studies Group, LLC
Contact: Nick Henninger
3642 Ligon Road
Ellicott City, MD 21042
Phone: 443-752-0049
Fax: 410-510-1114

Powered Aire, Inc.
Contact: Jamie Jazwinski
109 Mortensen Road
Greenville, PA 16125
Phone: 724-588-3305
Fax: 724-588-3371

Preferred Systems, Inc.
Contact: Jillian Krause
1341 West 6th Street
Erie, PA 16505
Phone: 814-397-3684

Price Industries, Inc.
Contact: Jerry Sipes
2975 Ridge Court
Suwanee, GA 30024
Phone: 770-623-8050
Fax: 770-623-6404

Process Engineering Consultants, Inc.
Contact: Ronald L. Finger
1911 North, Highway 30, Suite 140
Tampa, FL 33619
Phone: 813-766-4758
Fax: 813-662-3563

Professional Development Seminars, Inc. (PDS, Inc.)
Contact: Wesley G. Grace
26239 Elmore Park Road
Memphis, TN 38134
Phone: 901-493-6502
Fax: 901-756-2757

Professional Development Options
Contact: Ken Hudspeth
1431 Graham Drive, Suite 265,
Tomball, TX 77375
Phone: 803-366-2152
Fax: 803-366-2313

Professional Education Services Company, Ltd.
Contact: Nick Georgalis
Post Office Box 31542
Independence, oh 44131
Phone: 216-401-5326

Professional Online Educators, Inc.
Contact: Abraham Lee, P.E.
125 South State Road 7, Suite 104-210
Wellington, FL 33414
Phone: 888-346-4734
Fax: 888-346-4734

Pureflow, Inc.
Contact: Margie Reynolds
1241 Jay Lane
Graham, NC 27253
Phone: 336-532-1118
Fax: 336-532-0310

Puroflux Corporation
Contact: Dennis Jamison
2121 Union Place
Simi Valley, CA 93065
Phone: 805-579-0216
Fax: 805-579-6005

Mr. Randolph A. Petersen, PE F.NSPE
c/o Bowman Consulting Group
Contact: Randolph A. Petersen
2530 Riva Road, Suite 200 
Annapolis, MD 21401
Phone: 443-837-3769
Fax: 410-224-7592

Redi Rock of Maryland, LLC
Contact: Russ Rostkowski
Post Office Box 370
Laurel, MD 20725
Phone: 888-748-4747
Fax: 301-776-4775

Remington and Vernick Engineers
Contact: Michael Angelastro
232 Kings Highway East
Haddonfield, NJ 08003
Phone: 856-795-9595
Fax: 856-216-9942

Rinker Materials
Contact: Aimee Connerton
1751 Monocacy Boulevard
Frederick, MD 21701
Phone: 301-357-0324
Fax: 301-698-5351

RISA Technologies
Contact: Amber Freund
26632 Towne Centre Drive, Suite 210
Foothill Ranch, CA 92610
Phone: 949-951-5815
Fax: 949-951-5848

Robert Bost Associates
Contact: Mark Mehicic
8420 Gas House Pike, Suite Q
Frederick, MD 21701
Phone: 301-206-9466 Ext. 5
Fax: 301-206-9469

RMF Engineering, Inc.
Contact: Robert Smith
5520 Research Park Drive, Suite 300
Baltimore, MD 21228
Phone: 410-576-0505
Fax: 410-385-0327

Robroy Industries Texas, LLC (dba Corrosion College)
Contact: Stephanie Ellis
1100 US Highway 271 South
Gilmer, TX 75644
Phone: 903-843-5591

Rummel, Klepper & Kahl (RK&K)
Contact: Sue Moynihan
700 East Pratt Street
Suite 500
Baltimore, MD 21202
Phone: 410-462-9226

Ruskin Company
Contact: David Wall
3900 Dr. Greaves Road
Kansas City, MO 64030
Phone: 816-761-7476
Fax: 816-763-8102

Samsung HVAC
Contact: Fadi Daniel
776 Henrietta Creek Road
Suite 100
Roanoke, TX 76262
Phone: 703-939-5630

Sargent & Lundy, LLC
Contact: DeAnna Myers
55 East, Monroe Street, Suite 2700
Chicago, IL 60603
Phone: 212-269-2712
Fax: 312-269-9743

Sauerisen- CTS
Contact: Jon C. Lattin
2326 Northwood Avenue
Easton, PA 18045
Phone: 610-438-8950
Fax: 610-438-8950

SavATree
Contact: Eve Hundt
550 Bedford Road
Bedford Hills, NY 10536
Phone: 914-864-3158
Fax: 914-244-9375

The Schebler Company
Contact: Mitch Gansen
5665 Fenno Road
Bettendorf, IA 52722
Phone: 563-723-2541

Schnabel Engineering, LLC
Contact: Ken Derrenbacher
1504 Woodlawn Drive
Baltimore, MD 21207
Phone: 410-944-6170
Fax: 410-944-1162

School of PE
Contact: Vinod Dega
545 Metro Place South, Suite 100
Dublin, OH 43017
Phone: 614-873-7475
Fax: 614-873-7476

Scientific Expert Analysis Limited
Contact: Dennis A Guenther, Ph.D., P.E.
7349 Worthington-Galena Road
Columbus, OH 43085
Phone: 614-888-4160
Phone: 800-782-6851

SE University (SE Solutions, LLC) 
Contact: Lisa Willard
691 Ottawa Beach Road
Holland, MN 49424
Phone/Fax: 805-482-8436

Semtrain, LLC 
Contact: Shadid Rauf
3165 Page Avenue
Virginia Beach, VA 23451
Phone: 704-477-9166

Sherman Engineering
Contact: Nikita Patel
1830 County Line Road, Unit 303
Huntingdon Valley, PA 19006
Phone: 215-340-5300

Sherwood Logan & Associates
Contact: Patrick E. Foley
2140 Renard Court
Annapolis, MD 21401
Phone: 410-841-6810
Fax: 410-841-6330

SidePlate Systems, Inc.
Contact: Kelly Barraza
25909 Pala, Suite 200
Mission Viego, CA 92691
Phone: 949-238-8900

Lisa Simms, P.E., CPESC
Contact: Lisa Simms
443 Bricker Road
Bernville, PA 19506
Phone: 610-488-8496

Simpson Strong-Tie
Contact: Carl W. Scheffel
3100 Falls Cliff Road
Baltimore, MD 21211
Phone: 410-261-2406
Fax: 410-243-2701

S. K. Ghosh Associates, Inc.
334 East Colfax Street, Unit E
Palatine, IL 60067
Phone: 847-991-2700
Fax: 847-991-2702

Skyline Steel, LLC
Contact: Graham Bennett
8 Woodhollow Road, Suite #102
Parsippany, NJ 07054
Phone: 412-437-1102
Fax: 412-561-5936

SLTNS Engineered Systems, LLC
Contact: Brian Ryglewicz
137 National Plaza, Suite 300
National Harbor, MD 20745
Phone: 301-944-5670

Society of American Military Engineers
Contact: William Baker
SAME Chesapeake Post
5 South, Main Street
Bel Air, MD 21014
Phone: 443-371-9295

Soltesz, Inc.
Contact: Kris Pettit
2 Research Place, Suite 100
Rockville, MD 20850
Phone: 301-948-2750
Fax: 301-948-9067

South Atlantic Section of the Air &
Waste Management Association
Contact: Roy Neulicht
101713 Marabou Court
Raleigh, NC 27614
Phone: 919-846-0760
Fax: 410-247-2484

Spirotherm, Inc.
Contact: Christopher Whalen
25 North, Brandon Drive
Glendale Heights, IL 60139
Phone: 410-956-5750

St. Mary’s Soil Conservation District
Contact: Bruce A. Young
26737 Radio Station Way, Suite B
Leonardtown, MD 20650
Phone: 301-475-8402, ext. 3
Fax: 301-472-8391

Steel Tube Institute
Contact: Holly Schaubert
130 E. Randolph St.,
Suite 2000 #10,
Chicago, IL 60601
Phone: 303-720-7046
Fax: 847-660-7981

StormTrap, LLC
Contact: Doug Statler
1287 Windham Parkway
Romeoville, IL 60446
Phone: 240-309-3358
Fax: 331-318-5347

STH, Inc.
Contact: Mark Smullen
97-C Monocacy Boulevard
Frederick, MD 21701
Phone: 301-682-3390 x 110
Fax: 301-682-3391

Structural Group, Inc.
Contact: Shannon Williams
10150 Old Columbia Road
Columbia, MD 21046
Phone: 410-850-7000
Fax: 410-850-4111

STV, Inc
Contact: Aiyana Hooper
700 Red Brook Boulevard, Suite 300
Owings Mills, MD 21117
Phone: 410-944-9112

Summer Consultants, Inc.
Contact: James P. Hoffman
6845 Elm Street, Suite 200
McLean, VA 22101
Phone: 703-556-8820
Fax: 703-442-8419

SunCam, Inc.
Contact: William C. Dunn, P.E.
3111 Hartridge Ter
Wellington, Florida 33414
Phone: 561-753-0105

Systech Design, Inc.
Contact: Matt Glover
300 North, Pottstown Pike, Suite 220
Exton, PA 19341
Phone: 610-524-9048
Fax: 610-524-7355

TA Hydronics
Contact: Bhumika Lathia
8908 Governors Row
Dallas, TX 75247
Phone: 214-354-9567

Tensar, Incorporated
Contact: William Maier
2500 Northwinds Parkway, Suite 500
Alpharetta, GA 30009
Phone: 888-828-2089
Fax: 770-344-2089

Titan Continuing Education, Inc.
Contact: Jason Broverman
18858 North Dale Mabry Highway
Lutz, FL 33548
Phone: 813-949-5343
Fax: 813-949-1013

Tramont Manufacturing, LLC
Contact: Brian VenHorst
326 E Keefe Avenue
Milwaukee, WI 53186
Phone: 414-659-0314
Fax: 414-967-8811

TransCen, Inc. Mid-Atlantic ADA Center
12300 Twinbrook Parkway, Suite 350
Rockville, MD 20852
Phone: 301-424-2002
Contact: Emily Malsch

Transcend Software, Inc.
Contact: Thomas Klein
61 Princeton Hightstown Road
West Windsor, NJ 08550
Phone: 609-613-2726

Trane
Contact: Marc Randell
10947 Golden West Drive, Suite 100
Hunt Valley, MD 21031
Phone: 410-403-2200
Fax: 410-403-2225

Underground Solutions, Inc.
Contact: Matthew P. Boeh
1792 Sycamore Drive
Quakertown, PA 18951
Phone: 412-418-3201

Underground Services, Inc.
Contact: Timothy Hoffer
24 Hagerty Boulevard, Suite 11
West Chester, PA 19382
Phone: 610-738-8762
Fax: 610-696-7864

UV Resources
Contact: Lorrie Todd
P.O. Box 800370
Clarita, CA 91380
Phone: 919-616-7789

Vector Solutions
Contact: Kyla Forsyth
4890 West Kennedy Boulevard, Suite 740
Tampa, FL 33609
Phone: 813-207-0012

Veolia Water Technologies, Inc.
Contact: Erica Corbeil or Siham El Murr
4105 Sartelon Street
Saint-Laurent, QC H4S 2B3
Phone: 514-334-7230
Fax: 514-334-5070

Virginia Asphalt Association
Contact: Trenton Clark
6900 Patterson Avenue
Richmond, VA 23226
Phone: 804-288-3169
Fax: 804-288-4551

Virginia Maryland Associates
Contact: Matt Bieganski
860 Portsmouth Blvd.
Suffolk, VA 23434
Phone: 703-994-0531

Voith Hydro
Contact: Joan Milner
760 East Berlin Road
York, PA 17408
Phone: 717-792-7820

Van A. Singer, PE
Contact: Van Singer
1455 Clinton Drive
Yardley, PA 19067
Phone: 215-962-3218
Fax: 215-240-4528

Warren Cohn
Contact: Warren Cohn
24 Central Drive
Farmingdale, NY 11735
Phone: 484-689-1113

Washington Area Railway Engineering Society (W.A.R.E.S.)
Contact: Bharat Kumar Peddu
736 – 5th Street, NE, Apt B
Washington, DC 20002-3587
Phone: 443-348-2017

Water Research Foundation
Contact: Kim Linton
6666 West, Quincy Avenue
Denver, CO 80235-3098
Phone: 303-734-3425
Fax: 303-730-0851

WBCM
Contact: Brain Noll
300 East Joppa Avenue, Suite 200
Baltimore, MD 21286
Phone: 410-512-4564

Westlake Pipe and Fittings
2801 Post Oak Boulevard
Houston, TX 77056
Phone: 4112-694-2879
Contact: Alexandria DeMonia

Whitman, Requardt & Associates, LLP
Contact: Anthony U. Olsen
801 South Caroline Street
Baltimore, MD 21231
Phone: 443-224-1538

William Henning
Contact: William Hennng
31407 Nanticoke Lane
Dagsboro, DE 19939
Phone: 443-928-3345

The Wire Reinforcement Institute
Contact: Robert J. Weil
11325 Random Hills Road
Suite 360
Fairfax, VA 22030
Phone: 703-225-3477
Fax: 703-225-3333

W.J. Castle, P.E. & Associates, P.C.
Contact: William Castle
1345 Route 38
Hainesport, NJ 08036
Phone: 609-261-2268

X Energy, LLC
801 Thompson Avenue
Rockville, MD 20852
Phone: 301-358-5600 Ext. 8392
Fax: 301-358-5603
Contact: Emily Barrett

Xylem Sanitaire Products
Contact: Mark Gehring
9333 North, 49th Street
Brown Deer, WI 53223
Phone: 414-365-2375
Fax: 414-365-2210