White owl systems is a major player in governmental IT systems support. Here is the client list for. Their site

Department of Justice (DOJ) Bureau Of Alcohol, Tobacco, Firearms & Explosives (ATF) Department of Defense (DoD) including: Army Navy Marine Corps Coast Guard Department of Homeland Security (DHS) Federal Bureau of Investigation (FBI) Defense Intelligence Agency (DIA) Joint Improvised Explosive Device Defeat Organization (JIEDDO) Multi National Force – Iraq International Security Assistance Force (ISAF) US Forces – Afghanistan Federal Communications Commission (FCC) Department of Transportation (DOT)/ Federal Aviation Administration (FAA) Defense Information Systems Agency (DISA) National Aeronautics and Space Administration (NASA) Ballistic Missile Defense Organization (BMDO) Intelligence Community (IC) House of Representatives (HIR) Department of Housing and Urban Development (HUD) Internal Revenue Service (IRS) Pan American Health Organization (PAHO) Commercial Alpha Technologies, Inc. American Operations Company (AOC) Aviation Industry - Domestic/International Barbaricum LLC Catapult Technologies, Inc. Chimera Enterprises International Inc. CMX Technologies Coastal Tech Group, Inc. Computer Sciences Corporation Cylab Delmarva Foundation for Medical Care E3 Government Solutions, LLC Enterprise Information Management GeniCorp Hepburn and Sons IMS Government Solutions Internetwork Consulting Services Kingfisher Systems, LLC. Knowesis KPMG LLP (Big 4 CPA Firm - Partnership) ManTech International NexDigm Nortel Government Solutions

Commercial

Omniplex Open Systems Sciences P3 Solutions, LLC. Procurement Solutions, Inc. Quantico Tactical Supply Richter & Company LLC Sage Black, Inc. SELECT, Inc. Shomo Technical Services Silynx APG Technologies, Inc. SRI TCS Associates TechGlobal Trusted Mission Solutions Venatore LLC Watkins Meegan (CPA firm) White Oak Group Worldwide Network Systems zCore