I seek senior roles securing enterprise or classified environments
Thomas Hendriksen
@thomashendriksen
IT Ops & Security with 20+ yrs securing critical systems. Calm, skilled, and ready to relocate globally.
What I'm looking for
Security and network specialist with over 20 years of experience designing, implementing, and securing Microsoft and Cisco enterprise infrastructures.
Experienced in cloud migration, DevOps automation, and cyber defense for high-security environments. Background includes classified infrastructure projects for the Danish National Security and Intelligence Service and enterprise-scale Azure automation for Mærsk Line.
Recently focused on AI-driven automation and security, integrating Large Language Models (LLMs) and intelligent agents into enterprise workflows while maintaining strict compliance and risk controls. Skilled in developing secure AI integration frameworks that extend corporate security policies to cover AI-assisted automation and data protection.
Experience
Work history, roles, and key accomplishments
Cisco Network/Security Specialist
Lundbeck
Mar 2023 - Oct 2025 (2 years 7 months)
Implemented and trained AI security agents to monitor threats and secured medical PLC/SCADA equipment using Cisco Firepower/FTD; performed daily firewall management, ISE, and policy/equipment lifecycle management.
Cisco Network/Security Specialist
Statens-IT
Nov 2022 - Mar 2023 (4 months)
Implemented customer-requested firewall changes using Cisco Security Manager and Firepower/FTD, and managed daily firewall operations including ISE, TACACS, and RADIUS integrations.
Microsoft Enterprise Administrator
Statens-IT
Feb 2022 - Oct 2022 (8 months)
Administered Windows Server 2000–2022 environments, Exchange, AD, clustering, DNS, SCCM/SCOM, O365/Azure AD and VMware vSphere, and automated tasks with PowerShell to improve operational efficiency.
Cisco Network/Security Specialist
Statens-IT
Mar 2021 - Sep 2021 (6 months)
Executed firewall change requests via Cisco Security Manager and Firepower/FTD and managed daily firewall operations including ISE, TACACS, and RADIUS configuration.
Security Analyst / Auditor
Region Sjælland
Sep 2020 - Nov 2020 (2 months)
Delivered a comprehensive security posture report including red teaming-style audits of medico equipment, PLC controllers and network/security infrastructure and recommended management-level mitigations.
Security Analysis and Infrastructure Audit
Region Sjælland
Sep 2020 - Nov 2020 (2 months)
Conducted infrastructure and medical equipment audits, performed red-team style validation with the SOC and delivered management-facing reports to prioritize and mitigate high-risk findings.
IT-Security Architect
JN Data
Oct 2019 - May 2020 (7 months)
Architected and led implementation of IPAM and DNSSEC using Infoblox, integrated Check Point VSX, Cisco ASA and Nexus equipment, and deployed Hyper-V/Windows Server infrastructure.
DevOps/Infrastructure Consultant
Mærsk-Line
Oct 2017 - Sep 2019 (1 year 11 months)
Maintained global vessel IT fleet and led migration to a new virtualization platform; designed virtual Check Point firewall architecture and automated security policy deployment, reducing on-site engineering needs.
Cyber Security and Virtualization Expert
Ikanobank
Jun 2015 - Nov 2016 (1 year 5 months)
Performed daily security operations and audits for two data centers, managed network/firewall operations and optimized vSphere environments to resolve performance bottlenecks.
Network Security Architect
Ikanobank
Jun 2015 - Nov 2016 (1 year 5 months)
Performed daily datacenter maintenance and security audits, managed network/firewall operations, and optimized virtual infrastructure sizing and performance across vSphere environments.
Datacenter Virtualization Specialist
KMD
Jan 2015 - May 2015 (4 months)
Maintained a large datacenter environment, deployed and managed Windows servers for high-profile clients with strict uptime and ITIL-driven processes.
Cyber Security Specialist
Ezenta
Jan 2015 - May 2015 (4 months)
Maintained and supported large Check Point installations across Danish data centers and implemented new security solutions for enterprise customers.
Datacenter Virtualization Specialist
KMD A/S
Jan 2015 - May 2015 (4 months)
Maintained a large datacenter environment, deployed and managed Windows servers for high-profile clients with strict ITIL uptime and operational processes.
Cyber Security Specialist
Ezenta A/S
Jan 2015 - May 2015 (4 months)
Maintained large Check Point installations and implemented new security solutions across multiple Danish data centers, supporting market-leading Check Point deployments.
Network Security Architect
NNE Pharma Plan
Aug 2014 - Dec 2014 (4 months)
Designed and implemented a multi-site data-center network across three Brazil locations using Cisco Catalyst 4500X (VSS), ASA 5525 firewall clustering, and VMware vSphere for high availability and disaster recovery.
Network Security Architect
NNE Pharma A/S
Aug 2014 - Dec 2014 (4 months)
Designed and implemented a multi-site high-availability data-center network using Cisco Catalyst, ASA firewall clusters and VMware vSphere to ensure redundancy and 24×7 uptime.
Network Security Specialist
Danish National Security and Intelligence Service
Sep 2010 - Jul 2014 (3 years 10 months)
Designed redundant datacenter architectures using Cisco Nexus and VMware, implemented high-speed ASA 5585-X firewall clusters, and migrated and optimized firewall rule sets for maximum throughput and fail-over.
Education
Degrees, certifications, and relevant coursework
Niels Brock Business School
Datanom, Data/Systems Administration
1998 - 1999
Completed Datanom program concentrating on data management and systems administration from 1998 to 1999.
Niels Brock Business School
Informatikassistent, Information Technology
1996 - 1998
Completed Informatikassistent program focused on IT fundamentals and applied computing from 1996 to 1998.
Tech stack
Software and tools used professionally
Availability
Location
Authorized to work in
Social media
Job categories
Skills
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