Mark Siezenga USC Back Office Medewerker Name M.H. Siezenga Telephone 071 5278961 E-mail m.h.siezenga@usc.leidenuniv.nl USC Back Office Medewerker Student and Educational Affairs (SEA) University Sports Centre Operation Work address University Sports Centre Einsteinweg 6 2333 CC Leiden Contact 071 5278961 m.h.siezenga@usc.leidenuniv.nl No relevant ancillary activities Share on Facebook Share by Bluesky Share on LinkedIn Share by WhatsApp Share by Mastodon