Season 5 revealed that during the seven years Michael was presumed dead, he worked for Poseidon as a specialist who broke high-value targets out of international prisons.

Michael Scofield has broken out of prisons throughout the Prison Break series. While he is most famous for escaping three primary "iconic" facilities, his work as an undercover operative for the rogue agent Poseidon added several more successful escapes to his tally. The Iconic Escapes (On-Screen)

Michael's first and most famous escape, which he planned for months and tattooed onto his body.

The prison where Michael originally helped Whip escape before they became a team.