whoami

experience

1. Productsup

   2022 – present

   Principal Site Reliability Engineer

   • Design and setup new network infrastructure hosting 2k servers doing 200Gbit/s peaks
   • Automate migration to new infrastructure
   • Maintain contact with vendors/suppliers
   • Automation of server/service deployment
   • Write and deploy custom Netbox plugins
   • Network security

   • VyOS
   • BGP
   • IP Transit
   • Peering
   • IX
   • Ansible
   • Netbox
   • Zabbix
   • Python
   • Go
   • Grafana
   • HAProxy
   • Nginx

2. Telindus Nederland

   2019 – 2022

   Coördinator SMC Interrupt Driven

   2022

   • Responsible for the daily operations within the team
   • Handling P1 escalations
   • Resolving complex disruptions
   • Responsible for contact with management and other departments

   • IPv4
   • IPv6
   • Ubuntu
   • IPSec
   • DNS
   • Cisco ASA
   • Cisco Firepower
   • Fortinet
   • Palo Alto
   • Cisco UCS
   • Cisco DNA
   • PKI
   • VMware

   Coördinator SMC DevOps

   2021 – 2022

   • Responsible for daily operations in the team
   • Responsible for vision in monitoring & automation
   • Design and maintenance monitoring & automation platform (8000+ hosts)
   • Responsible for contact with management and other departments

   • Debian
   • Ubuntu
   • Zabbix
   • VMware
   • NetApp HCI
   • PKI
   • Python

   Developer Automation & Orchestration focus team

   2020 – 2021

   Within the team (consisting of 2 employees) we have devised and built an automation framework for integrating systems (ServiceNow, Zabbix, Ansible, etc.) with customer equipment (various brands) for automated task handling and incident resolution.

   Service Lead Engineer — Managed Services (freelance)

   2019 – 2021

   • Monitoring platform based on Zabbix and Zenoss (4000+ hosts)
   • Automation based on Ansible/Ansible Tower/Python
   • (Cloud) infrastructure based on Windows/Citrix/VMware
   • Guiding/training team members

   Service Lead Engineer (freelance)

   2019

   • Investigate and resolve complex network or firewall incidents on a wide variety of network infrastructures (for example Cisco ACI, DNA, Juniper)
   • Guiding or implementing network changes
   • Seeking correlation between various incidents taking place at the same infrastructure

3. Carante Groep

   2018

   Infrastructure / Security Consultant (freelance)

   • Hired to perform a migration of the e-mail infrastructure to DKIM/DMARC/SPF using Proofpoint
   • Responsible for network (email) security and authentication techniques

4. ZorgDomein

   2017 – 2018

   Senior Network Engineer (freelance)

   • Setup of high availability network infrastructure with own RIPE allocation and ASN
   • Performed a migration of the ZorgDomein infrastructure to new network infrastructure
   • Responsible for network security, firewall services and VPN IPSec tunnels (300+)
   • Responsible for firewall/network management
   • Setup of new datacenter location including Hyper-V cluster
   • Migration of on-premise Exchange to Office365
   • Setup of new storage platform based on Ceph/OpenStack

   • BGP
   • Transit
   • VyOS
   • Juniper
   • Dell
   • Hyper-V
   • OpenStack
   • Zabbix

5. DICTU

   2014 – 2016

   Infrastructure expert / network (freelance)

   • Consolidation of the network infrastructure
   • After the aggregation of several ministries we made an inventory of all the network services and wrote an advice/made a design on the new combined network
   • Design a new twin-datacentre; in consultation with the architects and other stakeholders we designed the new datacentre to work as a twin datacentre next to an already operational datacentre

6. SCC Services

   2014

   Infrastructure Expert (freelance)

   • Responsible for high-level and low-level design of data centers
   • Responsible for the core network including IP transit negotiations, peering relations, backbone capacity, complex customer/internal questions, expansion opportunities
   • Responsible for analyzing current usage/flexibility and advise further growth
   • Responsible for RIPE allocation connectivity
   • Responsible for connectivity (BGP/OSPF/RIP, Vyatta/Cisco, switches)
   • Implementation of new monitoring based on Netflow, SNMP using Nagios, Cacti and several other open source tools

7. HP Enterprise

   2014

   Senior Network Engineer (freelance)

   • Responsible for handling and screening all security-related issues of the DEMB network worldwide
   • Responsible for all firewall management/RfC management on DEMB firewalls (Cisco/Checkpoint)
   • Responsible for new infrastructure setup hosting all DEMB websites (Senseo, Pickwick, etc.)
   • Responsible for network security, firewall services and VPN
   • Responsible for all Linux/Unix based servers
   • Responsible for monitoring of Cisco routers/firewalls using SNMP and Netflow
   • Analyzing network traffic for possible threats

8. WIPA Nederland B.V.

   2008 – 2017

   Managing Director (owner)

   • Expanding the company revenue from € 300.000 in 2014 to € 1 mln. in 2016
   • Consulting clients about network and architecture
   • Responsible for partners/resellers
   • Responsible for network, application and network security
   • Delivery of 24x7 Citrix Online Desktop environment
   • Responsible for storage (Ceph, iSCSI, HP, Fibre Channel)
   • Responsible for network at 4 datacenter locations, fiber connections, BGP setup, Internet Exchanges, own RIPE IP spaces and ASN
   • Setup of high availability webhosting/database clusters

9. Information Trends B.V.

   2008 – 2021

   Managing Director (owner)

   • Analyzing the needs of clients and writing the project documentation
   • Responsible for all technical documentation
   • Development for several large clients as well as a lot of SMB clients, based on ASP/.NET/PHP/Python/Ansible
   • Worked for large clients: TMG Distributie B.V., DistriQ Transport, Mondi International, Rabobank, Unicef Netherlands