Louis B. Antonacci









1875 Connecticut Ave, NW
10th Floor
Washington, DC 20009
P: +1 (202) 545 7590

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University of Wisconsin Law School, J.D., cum laude, 2004, Managing Editor, Wisconsin International Law Journal, Wisconsin Moot Court Board - Philip C. Jessup International Law Finalist, 2004

Loras College, B.A., Business/Classical Studies,
cum laude, 1999



District of Columbia


The Commonwealth of Virginia


US District Court for the Eastern District of Virginia

US District Court for the Western District of Wisconsin

US Court of Appeals for the Seventh Circuit

United States Supreme Court

Mr. Louis B. Antonacci began his legal career in federal practice, representing the United States on construction projects throughout the country and around the world. Lou came out of law school as an Honors Attorney for the U.S. Army Corps of Engineers and the lead attorney for its global chemical demilitarization program. Lou represented the United States in mediation at the Armed Services Board of Contract Appeals, successfully resolving a contract dispute with a contractor processing chemical munitions at Deseret Chemical Depot in Tooele, Utah. Lou also negotiated executive-level agreements with the Russian Ministry of Defense concerning our demilitarization assistance program there. Lou is a certified trial attorney for the U.S. Army and he presented his paper on International Government Construction Contracting at the 2005 Chemical Weapons Conference in Edinburgh, Scotland.

Lou was deployed to Baghdad, Iraq in support of Operation Iraqi Freedom, where he reviewed hundreds of reconstruction contracts for legal sufficiency, and further advised the Contracting Directorate in developing prudent contracting policies to achieve successful outcomes in a contingency environment.

Lou utilizes his federal perspective to add value to his private clients’ business relationships. He has successfully represented owners, contractors, start-up companies, local governments and individuals in private and public disputes in state and federal courts, as well as arbitration and mediation. Lou’s litigation experience ranges from the successful protest of a multi-billion dollar IDIQ contract before the U.S. Comptroller, to the Supreme Court of Virginia’s reversal of a trial court’s setting aside of a $70,000 jury verdict in his client’s favor. In addition, he successfully prosecuted civil RICO and conspiracy claims in the U.S. District Court for the Eastern District of Virginia. Lou advises and represents clients in a wide variety of private and public commercial transactions as well, focusing on government contracts, construction, and corporate governance.

Lou regularly assists pro bono clients in the District of Columbia’s Small Business Assistance Program. He has successfully provided pro bono assistance to Iraqi refugees seeking admission to the United States as well.

Lou's student research for the Center for Problem-Oriented policing was later published by the U.S. Department of Justice.

  • Editor: West’s Federal Administrative Practice, Chapters 18 (Court of Federal Claims) and 19A (Attorneys’ Fees) (2007 to 2010).