Thomas Winther Mardahl

Leading Rejoose | Driving innovation in IT carbon data | Empowering teams for sustainable success | Focus on Company growth, and Positive impact

Copenhagen, Capital Region of Denmark, Denmark

About

As CEO and Chairman of the Board at Rejoose, I drive innovation where technology, sustainability, and business growth intersect. Recognized as a thought leader in IT sustainability, I shape industry agendas through active roles such as: - Part of technical taskforce @ EU Code of Conduct on Data Centre Energy Efficiency - Member of the Sustainability Board @ The Danish IT Association - Steering Committee member for the GreenCom project @ DTU (Technical University of Denmark) I bring together deep technical expertise and sharp business insight to help companies transform challenges like carbon accountability and digital infrastructure efficiency into strategic advantages. As a frequent speaker at international events, I advocate for a future where responsible innovation powers sustainable success. Core Competencies: - Business Development and Strategic Growth - Motivational Leadership and Team Empowerment - Project Management, Consulting, and Execution - Deep Data Analysis, Documentation, and Reporting - ICT Solution Expertise and IT Sustainability Strategy With a highly detail-oriented approach and a passion for execution, I turn complex opportunities into scalable results — helping businesses lead with purpose, impact, and resilience.

Experience

  • Founder at Rejoose
    Jul 2018 - Present · 8 yrs 1 mo

    Are you looking for energy and carbon emission data for your IT solutions - cross all vendors and supplier. Then look no further - we can deliver these data today … for your ERP systems and as an online collaboration platform. * Climate and Energy project tool for professionals Used by: - Energy and climate specialists - IT vendors and suppliers - Advisors and Consultants - Hosting and Cloud services

  • Contributor to GreenCOM project at DTU - Technical University of Denmark
    Jul 2023 - Present · 3 yrs 1 mo

    As Rejoose, we are both a member and part of the preparatory steering committee. Mainly focused on systems, standard and certification models for ICT products and services. We are working alongside a lot of other involved and knowledgeable parties.

  • Technical Specialist at EU Code of conduct on data center energy efficiency
    May 2019 - Present · 7 yrs 3 mos

    I'm a part of the EU Code of Conduct - Technical taskforce, working on defining standards and measurements for documenting: Datacenter Energy efficiency and sustainability

  • Managing Director & Founder at e|optimo
    Mar 2010 - Present · 16 yrs 5 mos

    E Optimo delivers documentation, analysis and consulting skills on the 3 core areas of ’Green Economy’ – Energy, Environment and Economy. E Optimo delivers overview and insight on energy usage and optimization potentials. Our specialists cover all areas of the Company, from IT to production and identifies the best practise solutions for each project.

  • Contributor to DTU EnCOM project at DTU - Technical University of Denmark
    Jan 2021 - Oct 2022 · 1 yr 10 mos

    Was a part of the initial IT Certification program run by DTU. Purpose was to lead the way for later set programme GreenCOM.