410-884-1160 410-884-1160

Mark J. Hardcastle

ISLN: 906704057
Email: click here to contact

Practice areas


  • Maryland, 1976
  • District of Columbia, 1978
  • U.S. District Court, District of Maryland
  • U.S. District Court for the District of Columbia
  • U.S. Court of Appeals, 4th Circuit
  • U.S. Court of Appeals for the District of Columbia Circuit
  • U.S. Tax Court
  • U.S. Court of Federal Claims
  • U.S. Supreme Court


  • University of Maryland, J.D.
  • Lehigh University, B.A. with highest honors


Associations & memberships

  • District of Columbia Bar
  • Howard County Bar Association
  • Maryland State Bar Association, Inc. (Former Vice-Chairman, Judicial Administration Section)

Biographical details

Law Clerk to Chief Judge James Macgill, 5th Judicial Circuit of Maryland, 1975-1976. Of Counsel, Tillman, Shehan & Letzkus, LLC.

Mark J. Hardcastle serves clients in Columbia, Maryland and throughout the Mid-Atlantic region.