Markus Tacke has been named chief executive of merged Siemens Gamesa Renewable Energy.

Sian Baldwin takes over as chief executive officer of Xoserve, where she had previously been a non-executive director, from 5 June.

Lesley Rudd has taken over as chief executive of the Sustainable Energy Association (SEA) from Dave Sowden. Sowden will work as a strategic adviser to the SEA, and has also been appointed non-executive chairman of Ecuity Consulting.