Locations

Regional Offices

HEADQUARTERS – Reston, Virginia

11107 Sunset Hills Road, Suite 400
Reston, VA 20190
Phone: (703) 478-5186
Fax: (703) 471-4180

Huntsville, Alabama

4825 University Square, Suite 6
Huntsville, AL 35816
(256) 970-2100

Phoenix, Arizona

3877 N 7TH ST, Suite 306
Phoenix, Arizona 85014
Phone: (602) 307-0047
Fax: (480) 498-7144

Lakewood, Colorado

12596 West Bayaud Ave, Suite 300
Lakewood, CO 80228
Phone: (720) 381-5592

Merritt Island, Florida

2405 N Courtenay Parkway
Suite 203
Merritt Island, FL 32953
Phone: (407) 210-6627
Fax: (407) 965-5447

Atlanta, Georgia

1745 Phoenix Blvd.
Suite 200
Atlanta, GA 30349
Phone: (470) 571-3271

Overland Park, Kansas

6340 Glenwood Street, Ste. 200, Bldg. 7
Overland Park, Kansas 66202
Phone: (913) 317-8860
Fax: (913) 317-8868

Billings, Montana

Spectrum Engineering and Environmental, LLC
1413 4Th Ave N
Billings, MO 59101
Phone: (406) 259-2412
Fax: (406)-259-1456

St. Louis, Missouri

110 James S McDonnell Blvd
Hazelwood, MO 63042
Phone: (314) 451-2963

Oakhurst, New Jersey

33 Arno Street
Oakhurst, NJ 07755
Phone: (732) 233-1161

Ballston Lake, New York

Northway 10 Executive Park, 313 Ushers Road
Ballston Lake, New York 12019
Phone: (518) 877-0390
Fax: (518) 877-0414
 

Haddonfield, New Jersey

9 Tanner Street, Suite 101
Haddonfield, NJ 08033
Phone: (215) 636-0667
Fax: (215) 636-0668
 

Gloucester City, New Jersey

130 North Broadway
Gloucester City, NJ 08030
Phone: (856) 742-5630

San Antonio, Texas

85 NE Interstate Loop 410, Suite 215
San Antonio, TX 78216
Phone: (210) 348-8778
Fax: (210) 348-8777
 
 

Project Offices

For more information contact projectoffice@hgl.com

Martinez, CA

Delaware City, DE
Cape Canaveral, FL
Hill AFB, UT

 Newton County, MO     
Hastings, NE

Galloway Township, NJ

Deadwood, SD