Vinita/ Michael Kiefner, the Grand River Dam Authorityís Chief Operating Officer (COO), has been named interim Chief Executive Officer/Director of Investments. The GRDA Board of Directors named Kiefner to the post at its July 13 meeting in Chandler, Oklahoma.

Kiefner first joined GRDA in March 2004, to serve the organizationís General Counsel. He was appointed to the GRDA COO post in January 2006. Prior to joining GRDA, he served as Oklahoma State Senate Staff Attorney.

Kiefner earned his Juris Doctor at Oklahoma City University and is a member of the Oklahoma Bar Association. In March 2011, he also received certification as a North American Electric Reliability Corporation (NERC) Reliability Coordinator.

He will fill the interim post while the GRDA Board continues its search to replace former Chief Executive Officer Kevin Easley, who announced his resignation in April.