LONGMONT, Colo.--(BUSINESS WIRE)--UQM Technologies, Inc. (NYSE MKT: UQM) today announced that its board of directors has promoted Joseph Mitchell to the position of Chief Operating Officer with additional responsibilities of interim President and CEO, effective immediately, as the board sets out to identify a permanent CEO through a disciplined search process. Eric Ridenour, UQM’s former Chief Executive Officer, President and Director, has left the company to pursue other interests. John Sztyki