Gregory R. Hallmark is an experienced government contracts litigation attorney in Holland & Knight's Tysons office. He is well versed in prosecuting and defending bid protests before the U.S. Government Accountability Office (GAO), the U.S. Court of Federal Claims and at the agency level. He also assists clients with contract claims and litigates contract disputes before the Armed Services Board of Contract Appeals (ASBCA) and Civilian Board of Contract Appeals (CBCA).

In addition, Mr. Hallmark advises businesses on a range of issues, including compliance with the Federal Acquisition Regulation (FAR) and federal grant regulations, False Claims Act (FCA) matters, subcontracts and teaming arrangements, commercial item issues, cost and pricing matters, organizational conflicts of interest, terminations, and small business regulations.


  • The University of Texas School of Law, J.D., with honors
  • University of Virginia, B.A., Government and Economics, with highest distinction
Bar Admissions/Licenses
  • District of Columbia
  • Virginia


Speaking Engagements