Judge Hatfield worked in the Social Security Administration from 1976 until his retirement in 2012, serving in such key positions as the Acting Chief Judge, Assistant Regional Chief Judge, Hearing Office Chief Judge for the Seven Fields Hearing Office, Hearing Office Chief Judge for the Pittsburgh Hearing Office, Administrative Appeals Judge with the Appeals Council, and Director of the Office of Civil Actions. Judge Hatfield has written and taught extensively in his field. He was a faculty member for new Administrative Law Judge training since 1990, and was in charge of Supplemental Training for all new Administrative Law Judges. He has testified before Congress regarding the Social Security disability program, and has been a frequent speaker on Social Security matters. He received his B.A with high distinction (Phi Beta Kappa) from Indiana University and his J.D. from George Mason University School of Law.