Recent experiences

Since July 2022, I have been a Senior Network Engineer for Sewan Nederland

In 2025 I finished these projects successfully:
- Made new designs, based on Zero Trust Architecture, to modernise the ISP network.
- Design and configuration of 6 new Cisco ASR9902 core routers.
- Design and configuration of a new FortiGate FG-900F cluster.
- Planned and executed migrations of customer circuits to the new routers.
- Planned and executed migrations of customer firewalls from ASA multicontext to Fortigate VDOM.
- Setup a remote access VPN for Sewan.
In 2024 I finished these projects successfully:
- Creation of configuration templates for automation of managed CPE configurations (Cisco,Huawei,Mikrotik) in several scenarios, for eaxmple BGP with dual CPEs.
- Configurations of managed CPEs with Ansible
Daily operations at Sewan included:
- Consult colleagues in Delivery, Sales, Support, Finance and Product Management departments.
- Solving complex technical tasks
- Documenting designs and solutions
- Maintaining an active role in renewing our product portfolio.
- Technical integrations with the French mother comapny.
- Maintaning routers and switches.
- Monitoring the health of the network.
- Network capacity planning.
- Datacenter installations.
- Delivery of L2 links with VLAN. VXLAN, local pseudowire and EoMPLS.
- Delivery of L3 links with IPoE or PPPoE.
- Configuration of managed CPEs (Huawei,Cisco,Mikrotik) with 4G fallback or BGP.

Where have I worked in the past ?

I have been in networking since 1999 and network security since 2002, and I have worked for ISPs for more than 13 years in total.
July 2022 until today - Senior Network Engineer @ Sewan Nederland B.V.
June 2018 until July 2022 - Network Consultant @ I-Share ICT Consultants
- Jaarbeurs Utrecht
- Lincoln Electric
- SSC-ICT (serving ministeries of Binnenlandse Zaken, Buitenlandse Zaken and Justitie)
- Open Line
March 2015 - June 2018 - NOC engineer @ RoutIT
December 2011 - March 2015 - tier 2 support engineer @ RoutIT
Oktober 2009 - December 2011 - tier 1 support engineer @ RoutIT
November 2008 until November 2009 - Operational consultant @ TUNIX firewalls
2002 until November 2008 - Support engineer (tiers 1,2 and 3) for SonicWALL firewalls @ HECC

Spare time

I play bass guitar and sing backing vocals in the band Songbird
I play table tennis in team Arena at Tafeltennis Nijmegen (TN)