Catharina Sikow-Magny joined the European Commission in 1997 and is currently the Director responsible for Internal Energy Market and the Acting Head of Unit in charge of retail markets, consumers and local initiatives in the Directorate General for Energy. Before that, she was the Head of Unit in charge of networks and regional initiatives. She has as well worked on international transport, trans-European network policy and financing, internalisation of external costs, and strategic policy research.

Before joining the Commission, Catharina Sikow-Magny was a team leader and chief economist in the private sector in Finland. She has also worked for the United Nations Development Programme in Port-au-Prince, Haiti. She holds a Master of Economics degree from the Aalto University, Finland.