Toncescu has been director of corporate governance at Transelectrica since December 2014.
The interim executive board pointed Friday consists of Bogdan Toncescu, Ionut-Bogdan Grecia, Adrian Moraru, Catalin-Constantin Nadolu, and Marius-Viorel Stanciu.
Transelectrica has a stock market capitalization of RON1.8 billion and is 58.7% owned by the Romanian state.