Patrick Casteleijn

Patrick Casteleijn has extensive experience in IT infrastructure and cybersecurity. Patrick currently serves as the Head of IT Infrastructure & Cybersecurity at Daisy Group, where they are responsible for the continuous development and maintenance of the company's Citrix environment and the migration and decommissioning of legacy Exchange environments. Prior to their current role, Patrick held various positions at Daisy Group, including IT Infrastructure Manager and IT Infrastructure Team Leader.

Before joining Daisy Group, Patrick worked at Reclassering Nederland as a Team Lead Windows/Citrix Engineers, where they managed the probation service's IT environment and a team of Windows and Citrix engineers. Patrick also worked as a Senior Windows/Citrix Engineer at Reclassering Nederland, where they managed the provisioned XenApp environment, multi-site Exchange environment, and provided third-line support.

Patrick began their career as a Systems Engineer at Wortell and later worked as a Second Line Support Technician at JHP Training. Patrick returned to Wortell as a Systems Engineer before joining Archer Daniels Midland, where they served as a Systems/Apps Administrator and Helpdesk Technician.

Overall, Patrick Casteleijn has a diverse background in IT infrastructure and cybersecurity, with a focus on Citrix and Windows environments. Patrick has experience managing teams, overseeing migrations, and providing technical support.

Patrick Casteleijn's education history includes obtaining a degree in Computer Science as a Systeembeheerder MKB from Regio College Zaandam, which was completed between 2000 and 2002. Patrick also pursued a degree in IT in the same institution, although the start and end years are unknown. Additionally, they obtained various certifications in the field, including Certified Information Systems Security Professional (CISSP) from (ISC)² in September 2021 and Citrix certifications such as CCA: Networking, Citrix Certified Associate - Networking (CCA - N), and Citrix Certified Professional - Networking. Other certifications include CCENT from Cisco, ITIL v2 - Foundation from ITIL Certified, and various Microsoft certifications such as MCITP: Enterprise Administrator 2008 and MCSA: Server 2008.