Curriculum Vitae

Stefan Reelsen, CCIE, CISSP, CISM, PMP

Senior Information Technology Advisor

Professional Profile

I am a results-driven Senior IT Advisor specializing in designing and implementing secure, scalable, and cutting-edge network and communication solutions. With 25+ years of experience, I have helped global enterprises navigate complex technological landscapes, streamline communications, and enhance security. My expertise spans across information security, network architecture, unified communications and cloud/hybrid computing—all backed by internationally recognized certifications such as CCIE, CISSP, and PMP.

Core Competencies

  • Strategic IT Consulting: Driving IT transformations in global organizations with a focus on secure communication, cloud solutions, and network optimization.
  • DevSecOps & Blockchain: Expertise in deploying and managing DLT and oracle networks, ensuring secure, scalable infrastructures.
  • Cybersecurity Leadership: Proven track record in advising and implementing robust cybersecurity frameworks for large enterprises.
  • Unified Communications: End-to-end solutions from Cisco UCC to Microsoft Teams, supporting global digital transformation initiatives.
  • Global Project Management: Managing large-scale IT projects with a focus on network refreshes, LAN/WAN upgrades, and secure communication frameworks.

Professional Experience

DevSecOps DLT/Oracles Nodes

Systems Development (2022 – 2023)
Emerging Technologies Specialist

  • Deployed and managed DLT masternodes to enhance network security and efficiency for decentralized applications.
  • Delivered comprehensive security management solutions for oracle networks.
  • Implemented oracle systems leveraging diverse APIs to enable seamless, secure integration.

Security Advisor, Distributed Ledger Technology

Global Security Consultant (2021 – 2022)
Consulting for Decentralized Autonomous Organizations (DAOs)

  • Advised on DLT-based loyalty programs, enabling secure and transparent customer engagement.
  • Architected smart contract platforms for staking and Web3 wallet integration, enhancing user experience.
  • Provided security insights that ensured the seamless execution of blockchain-based applications.

Senior Advisor, Solution Architecture & Tendering

Global Logistics Group, Germany (2020 – 2021)
Technical Network & Security Architect

  • Engineered a scalable, secure network infrastructure for critical communication services across global locations.
  • Spearheaded the development of a comprehensive network security framework and managed the entire tendering process from specification to evaluation.
  • Achieved seamless alignment of technical designs with cross-divisional teams, enhancing operational efficiency.

Technical Lead, Global Communications Solution

European Engineering Group, Germany & UK (2018 – 2019)
Cloud Communications Specialist

  • Led the transformation of the company’s communications platform from Cisco UCC to Microsoft Teams, streamlining global operations.
  • Coordinated with service providers and optimized network, security, and client infrastructures for cloud integration.
  • Delivered a modern, cloud-based global communications solution, improving internal and external collaboration.

Technical Project Manager, LAN/WAN & Unified Communications

Global IT Services Provider, Germany (2014 – 2017)
Global Infrastructure Refresh

  • Directed a global infrastructure refresh, upgrading LAN/WAN and communication platforms to a unified solution based on Cisco Systems.
  • Led the engineering and implementation of a Software Defined WAN (SD-WAN), improving network performance across global locations.
  • Designed and deployed a secure and harmonized LAN/WAN environment, enhancing overall business continuity.

Unified Communications Architect

European Food Industry Leader, Germany (2012 – 2014)
Group-wide Collaboration Infrastructure

  • Managed the implementation of a standardized, secure UCC infrastructure for factories and offices across Europe.
  • Designed and deployed a Microsoft Lync platform, transforming internal communication and collaboration capabilities.
  • Drove strategic vendor selection and project delivery, balancing technical, operational, and commercial considerations.

Education

  • Microsoft Certified Master
    Microsoft, Redmond, WA, USA (2012)

  • Cisco Certified Internetworking Expert (CCIE)
    Cisco Systems, Dallas, TX & San Jose, CA, USA (2008 & 2009)

  • Information Technology Specialist (State Certified)
    CMB, Gütersloh, Germany (1997 – 2000)

Certifications

  • CCIE Emeritus #25833 (Voice/Collaboration)
    Cisco Systems

  • CISSP (Certified Information Systems Security Professional)
    (ISC)²

  • CISSP-ISSMP (Information Systems Security Management Professional)
    (ISC)²

  • CISM (Certified Information Security Manager)
    ISACA

  • PMP (Project Management Professional)
    Project Management Institute (PMI)

  • MCM (Microsoft Certified Master)
    Microsoft

Contact

For more information or to discuss how I can assist your organization, please reach out at contact@digitanimus.com