Complex sentence: From 1995 to 2004, he worked at the United States Department of Justice in Philadelphia, first he serving as Counsel to the Office of Policy Development and later as a Federal Prosecutor in the U.S. Attorney's Office.
Split into simpler sentences: From 1995 to 2004, he worked at the United States Department of Justice in Philadelphia. At first he served as a Counsel in the Office of Policy Development and later as a Federal Prosecutor in the U.S. Attorney's Office.