Marcel Keizer (born 15 January 1969) is a Dutch football coach and former player, he was most recently the manager of Saudi Pro League side Al Shabab.

[3] On 17 June 2017, Keizer became the new coach of Ajax on a two-year contract, after managing the youth side in the previous season, thus replacing the Borussia Dortmund-bound Peter Bosz.

[4] After 17 games, Ajax were second in the Eredivisie, ranking with five points behind the leaders PSV, and Keizer was fired on 21 December 2017, after losing a cup match on penalties against Twente.

[5] He received his first foreign job on 2 June 2018, replacing retired compatriot Henk ten Cate at Al Jazira Club of the UAE Pro-League.

[14] On 13 October 2019, Keizer returned to Al Jazira on a two-year contract, after compatriot Jurgen Streppel left the Abu Dhabi-based club.