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Leon Ließem

Student Assistant

Leon Ließem aims to bring his knowledge from his work in ESG investment into the world of science. He strives to bring the two worlds of economics and ecology closer together and is therefore always open to new perspectives or concepts. Therefor he always approaches challenges positively and with an open mind. At IÖW he supports the research team of the projects “Wärmespeicher Berlin” and “Suburban Heat Shift 2” mainly in questions concerning the heat transition.

During his Master's degree in "Integrated Natural Resource Management", he is acquiring the necessary specialist knowledge to be able to play an even better role in the world of research.

Main focus

  • Natural Resource Management
  • Heat Transition in Germany
  • Transformation of financial sector (ESG Investment)


  • Since 12/2023: Student assistant in the heat transition project at IÖW
  • 02/2022 – 01/2023: Junior ESG Analyst at Union Investment
  • 2019 – 2022: Working student at Union Investment


  • Since 10/2023: Master in Integrated Natural Resource Management at the Humboldt University 
  • 2019 – 2022: Bachelor in Business Administration at the University of Cologne

Commitment and committees

  • 03/2021 – 02/2022: Executive Board Projects at Bundesverband Deutscher Volks- und Betriebswirte e.V. (bdvb)