Court Admissions

• Superior Court, District of Columbia, 1968
• U.S. Court of Appeals for the District of Columbia, 1968
• U.S. Supreme Court, 1972
• Maryland Court of Appeals, 1974
• U.S. District Court, Maryland, 1975
• U.S. Tax Court, 1986

Education

• Grinnell College, 1960–1962
• George Washington University, A.B 1964
• George Washington University School of Law, LLB 1967
• U.S. Navy JAG School, 1968
• Continuing professional education – throughout

Professional Affiliations

• American, Maryland, Montgomery County and District of Columbia Bar Associations
• Estate Planning Council of Suburban Maryland (Chair, 1990–1991)
• The Executive Committee (TEC)(1993–1996)

Career

• George Washington University Law Review (Managing Editor 1966–1967)
• Hollabaugh & Jacobs (Clerk, 1966–1967)
• U.S. Navy JAG (1968–1970)
• Antitrust Division, U.S. Department of Justice (1970)
• Arent, Fox, Kintner, Plotkin & Kahn (1970–1974)
• Hadley & House/Hadley, House & Rabin (1974–1997)
• Donald H. Hadley. LLC (1998–present)

Service Positions

• Rockville Planning Commission (Commissioner 2010–present, Chair 2014, 2015)
• Rainbow Place Shelter for Homeless Women (Counsel, 2015–present)
• The Wesley Seminary:  Foundation Board (1998–2010, Chair 2009–2010), Board of Governors (2009–2010)
• Multiple:  youth organizations (scouts, athletics), church service positions; community associations