Technical Field Manager

Jul 2019 - Aug 2021

• Coaching of 100+ consultants by having regular conversations with them, to optimize their work and self-being.
• Assisting with selecting proper training for our consultants.
• Looking for the best matches from leads and our people.
• Assisting trainee’s during their first experiences in the field.
• Assisting our consultants with writing a personal education plan (POP), which follow the developments on the market and match their personal goals.
• Preparing consultants for an intake at a potential client by doing preintakes, to raise the succes of the eventual intake.
• Constantly optimizing and improving resume’s for our consultants.
• Assisting our sales department by helping find potential leads and directing them to the Sales staff.
• Assisting our recruitment department by helping find potential engineers or trainee’s and connecting them to our recruitment staff.
• Guiding on internal (improvement) projects and setting up of new products with our junior and senior engineers.
• Contacting clients and getting the requirements straight to optimize and raise the quality of our consultancy.
• Obtaining feedback for consultants and convert them into measureable goals to further improve our consultants.

Linux and Network/Security Administrator at Gemeente Woerden, Woerden

Oct 2017 - Jun 2019

• Maintenance and support of the Unix environment.
• Enhancement of the puppet environment. Writing CMDB Module. Automatic deployment of changed code via gitlab hooks.
• Setup of Gitlab to centrally manage configurations (Puppet) and backup of configurations (etckeeper, rancid)
• Designing and setting up OpenVAS Appliance.
• Writing parsers to fetch information from the Storage and store it in InfluxDB. Create graphs from stored data in Grafana.
• Upgrading Puppet3 to Puppet6
• Deploying various changes to fix reported issues on faalkaart.nl.
• Deployment of Keycloak SSO and implement various SSO connectors like TopDesk.
• Writing enhanced bash based dialog scripts.
• Migrated an Zarafa mail environment to Kopano actively used by 1000+ clients.
• Advanced usage of NGINX forwarding.
• Setup collectd and netdata to gather system data and understanding trends
• Updated the Samba Fileserver (major change), Updated the Samba AD server (major change). Contact with the backend support party.
• writing custom migration scripts for Zarafa to Kopano.
• Writing a custom Rancid script to read the alcatel and hillstone firewalls.
• Migrated the networking environment from legacy Alcatel to new Alcatel. Created STP blocking bridge to ease migrations.
• Setup of Storage facilities on backup location.
• One of the authors of the change management guidelines and implementation of changemanagement in Topdesk. Writing templates to ease change requests.

Linux and Network/Security Engineer at Sue B.V., Geldermalsen

Sept 2016 - Sept 2017

• Various updates and upgrades for the infrastructure
• Updated the Juniper Switching platform
• Research and implementation of Rspamd as external MX gateways.

Networking administrator at Wintershall, Rijswijk

May 2016 - Sept 2016

• Maintaining and build out of existing network infrastructure
• Improved networks offshore with limited capabilities for 24 offshore locations and 2 onshore locations.
• Maintain and update the offshore MikroTik Wifi AP’s.
• Improved the Linux based Proxy and VPN’s that connected the MikroTik AP’s.
• Deployed several Serial to Ethernet connectors, on offshore locations.

Senior Network and Security Engineer / Teamlead Connectivity at Ziggo, Utrecht / Rijswijk

May 2014 - Apr 2016

• Implementing many large projects in the company.
• Doing troubleshooting to assist and aid projects.
• Training of coworkers, writing presentations and extensive documentation.
• Improved the ITIL process within the company. Created various templates.
• Many large changes to the Juniper SRX firewalls. Adding virtual routers, VPN’s, Setup JunOS Space.
• Teamlead for the Connectivity Team. Planning the projects with the team members. Communications with management and projectleaders.
• As Lead Networking Engineer designed a new internal firewall strategy after a company merger. Relocated management networks.
• Setup and assisted with various F5 Loadbalancers, existing and new.
• Assisted with the setup of several large (web)mail platforms based on Dovecot and Open-Xchange.

Senior Network and Security Engineer at Snow B.V., Geldermalsen

Jan 2014 - May 2014

• Firewall migration of the company’s main firewall. Switching from one platform to another
• Designed a new virtualization network for our consultants.
• Authored an article for Linux Magazine: Free or Open?
• Large technical contributions to the FreeBSD Project.

Senior Network and Security Engineer at Ziggo, The Hague / Utrecht / Rijswijk

Nov 2010 - Dec 2013

• Teamlead of my local projectteam, directly managing and supervising 3 people.
• Adopt design to technical documentation
• Setup a migration planning for 1000+ routers and switches
• Write technical documentation
• Communicate with, assist and plan migrations with other teams
• Backup to the projectleader, first point of contact

Sensior Network and Security Engineer at KPN/Getronics, Amsterdam / Rotterdam

Nov 2009 - Oct 2010

• Improve and build out existing network infrastructure
• Wrote technical Design’s for a large Dutch airline
• As Designer responsible for the migration of a large Dutch airline from one building and setup to another.
• Create standarised documentation, standardised network infrastructure designs.
• Troubleshooting issues on firewalls and proxies (Bluecoat). Assisted with troubleshooting a large Dutch insurance company.

Senior Network and Security Engineer at KPN, Rotterdam / Amsterdam

Jan 2009 - Oct 2009

• Main responsibility to migrate a legacy datacenter, to new facilities in Rotterdam. Migrated firewalls, servers, communication lines.
• Communicated with the customer about upcoming migrations and settled on migration dates.
• Implement new features as requested by the customer.

Senior Network and Security Engineer at KPN, Capelle a/d IJssel

Jun 2008 - Dec 2008

• Maintain and build out existing customer environment.
• Design new firewall and migrate from old (Checkpoint) to new (Juniper SSG) firewalls.
• Implement Fortigate firewalls at perimeter boundary.
• Design and implement monitoring system based on NMIS to replace current monitoring
• Implement usage of Rancid for large networking environment based on Cisco and Juniper to backup existing configuration.
• On the job training of colleague’s.

Security and Unix Engineer at a financial institute, The Hague

Oct 2006 - May 2008

• Maintain and build out existing Unix / FreeBSD Machines.
• Design new datacenter network based on Cisco and Checkpoint
• Trained colleague’s on the job.
• Maintain and build out existing VPN environment based on Checkpoint.
• Automated backup of configuration after changes to TFTP services.