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About Klemen Mark

Aviation Operations & Strategy Consultant

I support airlines, operators, MRO's, ATO's, OEM's and aviation groups in stabilising operations, improving performance, and executing strategic change during growth, transition, or turnaround phases.

With 25+ years in airline operations and executive leadership, including COO and Accountable Manager roles, I work hands-on with leadership teams on:

- Airline operations management and performance optimisation
- Cost efficiency, fleet and network optimisation
- Safety, compliance, and IOSA readiness
- Organisational build-up, governance, and executive decision support

Interim leadership and project-based executive assignments

I have led airlines through operational restructuring, regulatory audits, fleet transitions, and complex stakeholder environments, combining regulatory rigor with commercial pragmatism.

Clients value my ability to step in quickly, assess issues objectively, and deliver practical solutions that work in real-world airline operations — not just on paper.

Available for consulting, interim executive roles, and short-term advisory engagements across Europe, the Middle East, and international markets.
  • Slovenian

    Native or bilingual

  • Croatian

    Fluent

  • English

    Fluent

  • German

    Conversational

  • Italian

    Conversational

  • French

    Basic

Can work on-site
Zurich (up to 50km)

Experience

  • Chair Airlines AG
    Chief Operating Officer and Accountable Manager
    AVIATION AND AEROSPACE
    April 2021 - November 2025 (4 years and 7 months)
    Zürich, Switzerland
    Executive responsibility for end-to-end airline operations as COO and Accountable Manager. Led flight and ground operations, OCC, safety, compliance and CAMO. Delivered operational stabilisation, cost efficiency, IOSA readiness, and executive decision support in a complex airline environment.
    • •
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    • •
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    • •
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    Executive & Interim Leadership Airline Operations Management Safety, Compliance & IOSA Readiness Operational Performance Improvement Cost & Efficiency Optimisation
  • Chair Airlines AG
    Head of Flight Operations
    April 2019 - April 2021 (2 years)
    Zürich, Switzerland
    Senior operational leadership for daily flight operations and irregularity management
    • •
    • •
    • • Oversight of OCC, crew planning and scheduling, network execution Flight Operations
  • Germania Flug AG
    Head of Compliance - Compliance Monitoring Manager
    April 2017 - March 2019 (1 year and 11 months)
    Zürich, Switzerland
    • •
    • •
    • • actions Regulatory liaison and audit preparation Safety management, emergency response and security oversight Contribution to IOSA certification

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Education

  • Bachelor of Science
    University of Ljubljana
    2002
    Bachelor of Science

Skill set

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