Rainer Nõlvak is an Estonian entrepreneur and nature protector who is Chairman of the board of Estonian Nature Fund.
Rainer Nõlvak has advocated for the Estonian energy industry to move away from oil shale and move towards renewable energy systems. He has published the "Green Energy" program.
He was among the organizers of Let's Do It 2008, a civic action with 50 000 volunteers participating in cleaning up the countriside of Estonia in one day. Because of this he received the 2008 Estonian Volunteer of the Year national award.
He founded the following companies: Microlink Baltics, Curonia Research, Celecure.