OmniSystems' client list ranges from small companies to Fortune 500 companies, and include the following:
US Mainland
- Affiliated Computer Services (ACS, a Xerox company)
- Army Corps of Engineers
- AT&T Government Solutions
- Booz Allen & Hamilton
- Department of Energy
- Department of Labor
- Department of the Army
- District of Columbia
- DynCorp (now CSC)
- EDS (now HP)
- Environmental Protection Agency
- Federal Aviation Administration (FAA)
- Howard University
- Lockheed Martin
- Merck
- MicroTemps
- Neighborhood Reinvestment Corp.
- Northrop Grumman
- Perot Systems (now Dell)
- QinetiQ North America
- SAIC
- Tiber Creek
- Unisys
- US Army Reserve
- US Army National Guard
US Virgin Islands
- Bureau of Internal Revenue
- Bureau of Motor Vehicles
- Casino Control Commission
- Department of Education
- Department of Finance
- Department of Planning and Natural Resources
- Economic Development Authority
- Government Employees' Retirement System of the Virgin Islands
usvigers.com - Law Enforcement Planning Commission
- Office of Highway Safety
- Police Department
vipd.gov.vi - Public Finance Authority
- Schneider Regional Medical Center
srmedicalcenter.org - Superior Court
- University of the Virgin Islands
uvi.edu - Waste Management Authority
viwma.org - Water and Power Authority
viwapa.vi - WTJX - Public Television System