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Johan de Greef has a diverse work experience in the field of network engineering and consulting. Johan currently works at Solvinity as an Engineer, supporting customers with migration and transition projects. Prior to that, Johan worked as an Owner/Freelance Network Consultant at UP-IT, where they provided cost-efficient network solutions. Johan also served as a DevOps Network Engineer at ING Nederland, responsible for maintaining web proxies and remote access environments. Johan has held various roles at companies such as AnyLinQ, DLL, Conclusion FIT, Simac ICT Nederland bv, Detron Detachering, and Maxima Medical Center, where they gained experience in network troubleshooting, configuration, and implementation. Throughout their career, Johan has been involved in projects related to firewall and loadbalancer clusters, web proxies, and network connectivity.

Johan de Greef completed their Bachelor's degree in ICT Management & Security from Fontys University of Applied Sciences from 2006 to 2011. Before that, they attended the ROC Eindhoven School for ICT from 2003 to 2006. Johan also studied at Augustinianum, but the specific duration and field of study are unknown. In terms of certifications, Johan obtained various qualifications, including Vmware Certified Technical Associate - Network Virtualization (VCTA-NV) from VMware in March 2023, Check Point Certified Security Administrator (CCSA) from Check Point Software Technologies, Ltd. in December 2021, Professional Scrum Master - Level 1 (PSM-I) from Scrum.org in February 2021, F5 Certified BIG-IP Administrator (F5-CA) from F5 in June 2020, Cisco Certified Network Professional Enterprise (CCNP Enterprise) from Cisco in April 2012, and Cisco Certified Network Associate (CCNA) from Cisco in July 2010.