Hi I am David

Network & Systems Professional From the Netherlands


Independent government agency

• Migrate IAAS back to private infrastructure. 
• Design and implement new datacenter design.
• Design and implement Palo Alto Firewalls for inter department communications.
• Design and implemented hardening SSL sites internally and externally.
• Network migration from Cisco to Huawei
• Design and implement Azure MFA (Multi-Factor Authentication) for both private and cloud apps.
• Design and implement ISATAP to 'Manage Out' Direct Access Clients i.c.w. external load balancers

Services and support organisation for people with disabilities

Implementation of 1 GigabitEthernet DWDM solution in a ring topology i.c.w. Cisco network components for 10 large branch offices and 2 datacenters to replace MPLS interconnects and for redundancy.

• Design and implement a DWDM infrastructure, configured in a ring topology with a routing configuration based on OSPF

Services and support organisation for people with disabilities

Make improvements to the current DWDM infrastructure for better availability and resiliency. 
This includes a complete redesign of the current DWDM interconnects -configured in a ring topology- taking into account a migration path for 10 large branch offices and 2 Data Centers.


International shipbuilder

• Design engineering network medium location in Ukraine
• Remote network migration medium engineering location in Ukraine
• Design network medium location in South Africa
• Review RFCs from the business and monitoring implementation
  by supplier's
• Design and implement network optimization for Office 365
• Design and implementation WiFi design based on EAP-TLS and NPS
• Design and implementation miscellaneous i.c.w. Citrix NetScaler o.a.:
  • Office 365
  • ADFS 3.0
  • SharePoint 2013

Mental Health and Addiction Care


District Health Authority

Operational management of the ICT infrastructure consisting of 17 branch offices and 25+ MS Windows 2003 & 2008R2 server clusters with Exchange 2003/2007 and Citrix Presentation Server 5.0.
Network based on Cisco and Dell equipment

• Upgrade forest domain from 2003 to 2008R2
  • Change ‘Core’ Switches in Trunk configuration;
  • Management- en production network divided in VLAN’s
  • IP subnet renumbering on HQ from /24 to /23
• Maintain network Cisco DMZ, VLAN’s, VPN’s, WAN