Northern California Office

11875 Dublin Blvd., Ste. A-201
Dublin, CA 94568
Phone: 925.556.2600
Fax: 925.556.1444

Southern California Office

133 W. Lemon Ave.
Monrovia, CA 91016
Phone: 626. 256.0526
Fax: 626.256-0525 

San Diego Office

402 West Broadway, 4th Floor
San Diego, CA 92101
Phone: 619.595.3128
Fax: 619.595.3150

New York Offices

One Exchange Plaza
55 Broadway, Suite 303
New York, New York 10006
Phone: 212.785.4027
Fax: 212.785.2343

25 Smith Street, Unit 201
Nanuet, New York 10954
Phone: 845.623.5349
Fax: 845.623.5390

Long Island
626 RXR Plaza
Uniondale, NY 11556

Texas Office

100 Crescent Court, 7th Floor
Dallas, Texas 75201
Phone: 214.471.7861
Fax: 210.568.6429

Pinnacle Consulting Group (subsidiary of Willdan Energy Solutions)

4847 Hopyard Road, Ste. 4-321
Pleasanton, CA 94588