Dan Povenmire Corey Burton (Christmas Special) Robbie Wyckoff (singing voice in "Suddenly Suzy")
Building Engineer is a manager and delivery man ("Candace's Big Day"). He was the first person to ask the "Too Young" line. He also sang a song about this gag. He also appeared in "Phineas and Ferb Christmas Vacation", working at the local radio station in Danville.