Looking for a job

Thomas Hendriksen

@thomashendriksen

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IT Ops & Security with 20+ yrs securing critical systems. Calm, skilled, and ready to relocate globally.

Denmark

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What I'm looking for

I seek senior roles securing enterprise or classified environments

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 Firepower FTD Cisco ISE Firewall Management PLC SCADA Security AI Security Agents Policy Lifecycle Management Network Security

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.

Cisco Security Manager Cisco Firepower FTD Firewall Management Cisco ISE TACACS RADIUS Network Change Management

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.

Microsoft Office Windows Server Active Directory Microsoft Exchange SCCM SCOM Azure AD PowerShell O365 VMware VSphere

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.

Cisco Security Manager Cisco Firepower FTD Firewall Management Cisco ISE TACACS RADIUS Network Operations

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 Auditing Red Team PLC Medico Equipment Security Risk Analysis Report Writing Vulnerability Assessment

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.

Infrastructure Assessments Security Audits Red Teaming SIEM Validation Medical Device Security Risk Reporting SOC Collaboration

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.

IPAM DNSSEC Infoblox Check Point VSX Cisco ASA Cisco Nexus Hyper V Windows Server

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.

Hyper V Check Point GAiA PowerShell Automation Virtualization Migration SQL Server Azure WSUS Trend Micro

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.

Data Center Security vSphere Optimization Firewall Management Security Auditing Virtualization Network Security

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.

VSPhere Security Auditing Network Operations Performance Tuning

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.

Windows Server Virtualization ITIL Deploying High Availability Systems Administration

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.

Network Engineering Incident Response

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.

Datacenter Operations Windows Server Virtualization ITIL Server Deployment Systems Administration

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.

Check Point Network Engineering Data Center Operations Firewall Management security implementation Checkpoint

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.

Cisco Catalyst VSS Cisco ASA Firewall Clustering Data Center Design High Availability VMware VSphere

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.

Cisco Catalyst ASA 5525 5585 X Firewall Clustering VMware VSphere High Availability Disaster Recovery

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.