SunEdison Inc.’s spinoffs TerraForm Global Inc. US:GLBL and TerraForm Power Inc. US:TERP have shifted charge of day-to-day operations to a newly formed “office of the chairman” following the abrupt departure of their chief executive, the companies said Wednesday.

No reason was given for CEO Brian Wuebbels’ departure, and it was unclear whether he remained employed at SunEdison US:SUNE , where he has most recently held the title of chief financial officer and executive vice president.