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Sander Stolk is an experienced Information Security Officer and Network Engineer at Grafisch Lyceum Rotterdam since June 2012, overseeing a school network for approximately 4,300 users and managing various network components, including Extreme Networks switches, Dell SonicWALL firewalls, and Aruba Wireless systems. Sander's previous roles include System Engineer positions at Groenblok bv Tuincentrum Overvecht and Coolblue, where responsibilities encompassed Active Directory management, VMWare maintenance, and user support. Sander also has experience in Cisco management and network engineering from positions at Da Vinci College, Walburg College, and Shell Information Technology International. Sander holds an Associate's degree in ICT from Fontys University and diplomas in Network and System Administration from Baronie College and Albeda College, respectively.