D. Patrick Callahan


Office: Richmond

Direct: 804-403-7120

Fax: 804-403-7110


  • Professional Overview

    Patrick Callahan focuses on commercial, business and employment litigation in Virginia’s state and federal courts.  Mr. Callahan handles a variety of cases involving corporate governance, non-compete and other restrictive covenants, tortious interference, defamation, business conspiracy, fiduciary duties, false claims act violations, and consumer protection claims. Mr. Callahan has significant experience guiding commercial landlords and real estate trusts through the commercial leasing and eviction process, including litigation and collection negotiations with tenants ranging from sole proprietors to nationwide retail and restaurant chains. Mr. Callahan is also involved in litigating discrimination, retaliation, wage and hour, and wrongful termination claims in state and federal courts.  Mr. Callahan regularly defends against claims arising under Title VII of the Civil Rights Act of 1964, the Americans with Disabilities Act, the Age Discrimination in Employment Act, the Fair Labor Standards Act, the Uniformed Services Employment and Reemployment Rights Act, and the Family and Medical Leave Act.  Mr. Callahan also routinely advises clients on labor law issues, including claims arising under the National Labor Relations Act.

    In addition to guiding clients through the government investigation process, Mr. Callahan also represents clients before licensing boards and administrative agencies such as the Equal Employment Opportunity Commission, the U.S. Department of Labor, Virginia Employment Commission, the Virginia Alcoholic Beverage Control Authority, the Virginia Department of Social Services, the Virginia Department of Professional and Occupational Licensing, and the Virginia Department of Health Professions.  When disputes are not resolved through the administrative process, Mr. Callahan represents clients in appeals before the appropriate circuit courts as well as the Court of Appeals of Virginia and the Supreme Court of Virginia.

    Mr. Callahan has also represented various clients as a registered lobbyist before the Virginia General Assembly.

    Mr. Callahan joined O’Hagan Meyer from a full-service, national law firm with approximately 350 attorneys across 15 offices.  Before entering private practice, Mr. Callahan was an Honors Attorney with the National Labor Relations Board.

    After graduating from law school, Mr. Callahan served as a law clerk for the Honorable W. Reilly Marchant and the Honorable Joi Jeter Taylor of the Richmond Circuit Court.  Mr. Callahan previously served as a law clerk for the United States Senate Health, Education, Labor and Pensions Committee, and as a special assistant for workforce policy in the Office of Virginia Governor Timothy M. Kaine.

  • Practice Areas
  • Education and Admissions


    Mr. Callahan earned his J.D. from the West Virginia University College of Law, where he served as Executive Article Selection and Symposium Editor for the West Virginia Law Review and as a member of the United States Supreme Court clinic.

    Mr. Callahan earned a Master of Public Administration from Virginia Commonwealth University and a Bachelor of Arts in History and Political Science from James Madison University.


    Virginia Supreme Court, Eastern District of Virginia, Western District of Virginia, Eastern District of Virginia Bankruptcy Court, and Western District of Virginia Bankruptcy Court

    States Licensed

    • Virginia
  • Professional Organization Memberships
    • Virginia Bar Association, Labor & Employment Section
    • Virginia State Bar
    • Richmond Bar Association
    • Virginia Association of Defense Attorneys
    • Children’s Home Society of Virginia, Junior Board Member
    • Richmond City Council, Commission on Alternatives to Incarceration, Member
  • News, Honors, Publications & Speeches
    • Pi Alpha Alpha, National Public Affairs Honor Society
    • Emerging Leader, Sorensen Institute for Political Leadership, 2017
    • Honors Attorney, National Labor Relations Board, 2015-2016
    • Peggy Browning Fellow, National Employment Lawyers Association, 2013
    • Virginia Governor’s Fellow, 2009
  • Support Staff