Alphonso Manns is a member of the Monroe County Bar Association, Bloomington, Indiana; the Indiana Bar Association; the American Bar Association; the U.S. Supreme Court Bar; the Federal Bars of the Fifth and Seventh Circuits of the U.S. Court of Appeals; the Southern District of Indiana and Eastern District of California of the U.S. District Court; and Phi Alpha Delta Law Fraternity.

He formerly served as First Lieutenant, U.S. Army (1966-69); field examiner for the National Labor Relations Board, 1971-72; Assistant Professor and Director of Human Relations, Indiana University, Bloomington, Indiana (1972-74). He has been in the private practice of law for over twenty-five (25) years serving the citizens of Southern Indiana.