Philbin started in Green Bay in 2003 as an assistant offensive line coach, and eventually worked his way up to being the team's offensive coordinator. He served in that role from 2007 through 2011 before going to Miami. He lasted four years with the Dolphins before being replaced by Adam Gase, and has spent the last two seasons working as an assistant head coach and offensive line coach with the Colts.
During his time as Green Bay's OC, the Packers routinely had offenses that ranked near the top of the league in yards, points, and Football Outsiders' offensive DVOA.
Mike McCarthy is likely to keep the play-calling duties.