Ditewig started his career at SC Heerenveen, and later played two seasons for FC Emmen.
After some good performances, ADO Den Haag, whose had trouble finding keepers, chose to sign Ditewig.
[1] In 2010, Ditewig signed with Achilles '29, an amateur team playing in the Topklasse, the new third division in Dutch football.
Ditewig won in his second season this Topklasse and the title of best amateur club of the Netherlands against SV Spakenburg with 3-0 and 0–2.
[2] Besides football, Ditewig is a sports masseur and studied physical therapy at the Hogeschool Arnhem Nijmegen.