Clients and Partners

Client Testimonials:

“I found them to be accountable, courteous, and extremely professional.”
“They performed what was required of them under the contract, but also went beyond the scope if necessary to get the job done.”
“They performed to the complete satisfaction of the client.”
“…They are reliable, accountable, and flexible enough to cater their services to the individual needs of each client. I recommend them without hesitation and look forward to the opportunity to work with them again.”

Major Clients:

  • World Bank
  • Johnson Controls, Inc.
  • Northrop Grumman, Inc.
  • CISCO, Inc.
  • Commonwealth of Virginia
  • Jones Lang LaSalle Americas, Inc.
  • Freddie Mac
  • County of Fairfax
  • Worksers Compensation Commission
  • CB Richard Ellis
  • Complete Building Services
  • Lincoln Property Company
  • Donohoe Companies
  • Department of State
  • Social Security Administration
  • Virginia DMV
  • Liberty Property Trust
  • Northern Virginia Community College (NOVA)

Supplier Partners:

Our presence in this region since 1986 has enabled us to develop loyal, long-standing relationships with our vendors and suppliers. As a result, we are able to provide our clients with the best prices and resources available in the industry.

daycon

LeonardPaper

Lawrence EnvironmentalRutherford Supply

Green Supplies and Equipment:
GGSI is committed to performing its tasks using Green Seal/Green Rated approved chemical products, paper products, equipment, practices and processes in compliance with GS-37 standard requirements. Also, all equipment is compliant with EPA and CRI.