Who We Are

Company Overview

  • Cage Code: 1RTX7
  • DUNS:169884546
  • President & CEO: David Affeldt
  • Founded in 2000, privately held
  • CMMI Dev Level 3
  • ISO 9001:2008 Certified
  • Inc 5000 Fastest Growing Company

GRSi promises to deliver a partnership built upon trust and excellence.

GRSi is a professional services and technology innovations company, providing state-of-the art solutions across a broad range of requirements, in highly agile yet controlled environments complying with CMMI, SEI, IEEE/EIA standards and Lean Six guidelines supporting critical mission objectives in the DoD, Civilian and Intelligence communities.

We provide IT infrastructure modernization and architecture design, software engineering, technology assessment and insertion, and multi-tier IT Service Management to 10,000 direct users and more than 100,000 indirect users. By leveraging our more than 350 subject matter experts and CMMI/dev-ML3 appraised and ISO 9001:2015 audited processes coupled with our Agile best-practices, GRSi delivers excellence.


At GRSi, we believe our most valuable assets are our people and our clients. Honesty, integrity and commitment are our corporate values, by which we operate every day. We deliver high-quality, value-added solutions and consulting services to our clients - leveraging the best in Engineering, Technology, and most importantly, People.


We're a performance-based company: for our clients, for our employees, and for our values. We clearly communicate our corporate values to our employees and our partners, striving to always provide services and solutions based on: Trust, Respect, Integrity, Pride, Service, Quality, and Teamwork.


GRSi will become an industry-recognized Premier professional consulting services and technology solutions provider. We will earn our employees’ and clients’ enthusiastic support by delivering to them high-quality benefits, rewards and results.


GRSi is a different kind of company, from every area, top to bottom and back again. Every effort is to strengthen our clients and our teams, we invest in them, from training and certifications, to programs that inspire and reward innovation and performance, and true partnering with transparency for our employees, our teammates, and most imporantly our clients. Engage us and you will see the GRSi difference, in our solutions and in our people.

GRSi’s CEO, David Affeldt, tells SmartCEO Magazine about the GRSi difference:

Our Locations


GRSi Corporate Headquarters
  • 5295 Westview Drive, Suite 125
  • Frederick, MD 21703
  • Phone: 240.236.0800
  • Fax: 240.236.0888

Operations Centers

GRSi SPAWAR Operations
  • 2457 Aviation Ave, Suite 102
  • N. Charleston, SC 29406
  • Phone: 843.566.1340
  • Fax: 843.735.7052
Bethesda Technical Operations Center
  • 6720-B Rockledge Drive, Suite 777
  • Bethesda, MD 20817
Quantico USMC Operations
  • 800 Corporate Dr #301
  • Stafford, VA 22554
GRSi Woodlawn Facility
  • 3104 Lord Baltimore Dr, Suite 201
  • Baltimore, MD 21244

Field Offices

  • Spanish Fort, Alabama
  • San Diego, California
  • Chesapeake, Virginia