Suggest an update Name* Categories* State* Locality* ZIP* Street address* Phone* Website* Company description* Lawyer Thomas Robert Callahan, Practice Areas No known practice areas. is located in the city of Gambrills, the state of Maryland. Attorney legal address Thomas R Callahan PC 1500 Defense HwyGambrills, MD, 21054. For more information, please call (301) 261-0005 Your comments* (not for publishing) * — Required information Thomas Robert Callahan ← View details Thomas R Callahan PC 1500 Defense HwyGambrills, MD, 21054, Gambrills, Maryland (301) 261-0005