Thomas A. Lemmer

Thomas A. Lemmer

Partner - Denver
Download vCard
1400 Wewatta Street
Suite 700
Denver, CO 80202
TEL: 303.634.4350
FAX: 303.634.4400
Washington, DC
1900 K Street NW
Washington, DC 20006
Print PDF


Thomas A. Lemmer routinely counsels and litigates for clients on federal contract formation, contract administration and dispute resolution. His practice also involves state and local government and commercial contracting.

In the area of federal government procurement, Mr. Lemmer has significant experience in numerous areas, including contract cost allowability, the Cost Accounting Standards (CAS), Truth in Negotiations Act (TINA) and business systems. In the areas of CAS, Mr. Lemmer has been involved in issues relating to compensation, particularly pensions, postretirement benefits and employee stock ownership plans; restructuring issues; asset valuations in the context of mergers and acquisitions; independent research and development (IR&D) and bid and proposal (B&P) issues; legal costs; and environmental cost recovery issues. Regarding business systems, Mr. Lemmer is a co-author of Government Contractor Business Systems Compliance Guide. 

Mr. Lemmer has been involved in the preparation of equitable adjustment and breach of contract claims. He has litigated claims and other general contract interpretation issues involving changes, contract interpretation, and breach of contract issues, including construction claims and Freedom of Information Act (FOIA) cases. Mr. Lemmer has litigated actions before the Government Accountability Office, the Boards of Contract Appeals, the Court of Federal Claims, the Federal Circuit and federal district courts and courts of appeals. Mr. Lemmer also has been involved in due diligence reviews in support of corporate transactions.

Mr. Lemmer has participated in representing contractors regarding False Claims Act (FCA) investigations and litigations, including qui tam actions. Those investigations have involved the Department of Justice, local U.S. attorney's offices and various investigative services.

Before joining MLA, Mr. Lemmer provided consulting services on government contract issues at a then “Big 8” accounting firm. He is a non-practicing CPA, a fellow member of the Colorado Society of Certified Public Accountants and a member of the American Institute of Certified Public Accountants.

Mr. Lemmer was recognized by Chambers USA in 2015 as well as named a “Colorado Super Lawyer” by the publishers of Law and Politics. LexisNexis Martindale-Hubbell lists Mr. Lemmer as an AV Preeminent Rated Lawyer™. He is a recipient of the NCMA Fellow Award, which is reserved for individuals who have made significant contributions in the field of contracting and to the National Contract Management Association.

Notable Engagements


Bar Admissions

Court Admissions