Information Technology Security Specialist

Dylan Poelstra

EMPLOYEE

Technical Security Specialist for one of the biggest Manucipalities of The Netherlands

FREELANCER

Freelancing services such as pentests, web application assessmenst, advisory roles on IT acquisitions and much more.

Since 2019 graduated as an programmer, worked my way up to Security Specialist, acquired multiple certifications and currently studiying OT network security.

EDUCATION & CERTIFICATIONS

DEGREE'S

APPLICATIE ONTWIKKELAAR

MBO4

CompTIA Security+

2021

ITIL 4 Certified

Fundementals & Professional

OSCP Certified

2025

WORK EXPERIENCE

Technical Security Administrator
Manucipality Haarlem

2021 - Present

Accountable for the comprehensive security of the application landscape, including Web Application Firewalls (WAF), Secure Email Gateways (SEG), vulnerability management, web application security, threat monitoring, detection and response. Additionally, I provide strategic advisory support on acquisitions and actively monitor the market to identify and implement innovative security strategies

System Administrator
Sensys Gatso Group

2020 - 2021

Experienced System Administrator with a comprehensive skill set encompassing all critical roles within IT infrastructure, including service desk management, workplace administrationn,systems administration. Automation and Scripting, Strategic Advisory, implementing forward-thinking strategies to drive innovation and operational excellence.

IT HELPDESK
ViVa! Zorggroep

2019 - 2020

First support line for an major healthcare corporation, managing tickets, first line support, basic Widnows Server administration, basic powershell scripting, managing Active Directory, managing databases.

IT HELPDESK
WinSys

2019 - 2019

Microsoft verified reseller helpdesk, managing customers and complaints, microsoft support, managing Azure / Entra ID, first line of support, first point of contact.

IT HELPDESK
WinSys

2019 - 2019

Microsoft verified reseller helpdesk, managing customers and complaints, microsoft support, managing Azure / Entra ID, first line of support, first point of contact.