Judge Ahalt was admitted to the Bar of Maryland in 1967. He practiced law specializing in litigation. He practiced with Smith, Finley, Gray and Ahalt in Mt. Rainier, Maryland and the Goldstein, Ahalt & Bennett in College Park Maryland until he was appointed to the bench in 1982. He has been a business law lecturer at the University of Maryland. 

Judge Ahalt is a member of the Prince George’s County Bar Association, where he served numerous terms on the Executive Committee and as President from 1979 to 1980. Judge Ahalt is also a member of the Maryland State Bar Association having served on its Board of Governors for three terms, as Chairman of the Association’s Young Lawyers Section from 1973 to 1974 as well as other committees. In addition, he is a member of the American Bar Association, having served as a delegate to the House of Delegates, American Judges Association, State Delegate to the National Conference of State Trial Judges, and a Barrister with the American Inns of Court. He is a Fellow of the Maryland Bar Foundation and has served on the Foundation’s Executive Committee since 1990 and was Chairman of the Fellows in 1992-1993.Judge Ahalt is also a member of the Anne ¬†Arundel County Bar Association.¬†