Sjaak Polak (born 18 February 1976) is a Dutch professional football manager and former player who is the head coach of Derde Divisie club Lisse.

An outspoken wingback and freekick specialist, Polak previously played for Excelsior, Twente, and ADO Den Haag.

Maccabi was interested in Polak's services because of Jewish descent [3]), and would not count as a foreigner for the club, thanks to the Israeli Law of Return.

[4] Polak had trouble getting the necessary documentation proving his family's Jewish origins and when he was told that he would be asked to give up his Dutch citizenship, he decided to sign for BV Veendam back in his native the Netherlands.

[6] In April 2014, Polak was appointed as manager for the reserve team of Quick Boys for the upcoming season.