Klaus-Dieter worked from 1987 until 2020 at the European Commission, including four years at the European Court of Justice. During his 33 years at the European Commission, Klaus-Dieter Borchardt was instrumental in many major developments in EU Law and EU Agriculture and Energy Law and Policy. During his time in the Commissions Directorate for Energy, Klaus-Dieter Borchardt was the central EU official in the reform of the European electricity market design as part of the Clean Energy for all Europeans package. He chaired the Connecting Europe Facility's evaluation committee as well as the European gas, electricity and infrastructure fora. When he retired in September 2020, he was Deputy Director-General for Energy responsible for the coordination of the Policy Development, Internal Energy Markets, Renewable Energy and Energy Efficiency as well as for the Energy Dialogues with third countries. From October 2020 until July 2024 Klaus-Dieter Borchardt worked as a Senior Energy Advisor at the European Competition Law Practice in the Baker McKenzie office in Brussels. Since October 2025 Klaus-Dieter Borchardt is the Coordinator of the CESEC High Level Group.
Mr. Borchardt is a Teaching Professor at the Bavarian Julius-Maximilians- University - Würzburg, Germany (since 2001), Adjunct Professor at the Copenhagen Business School (since 2022) and Senior Research Fellow at the Oxford Institute for Energy Studies.