AUSTIN, Texas--(BUSINESS WIRE)--CIM Group and Seaholm Power LLC announced today that they have reached an agreement with athenahealth to lease 100 percent of the approximately 103,000-square-foot office space at Seaholm Power Plant, which is currently undergoing renovations. athenahealth, a leading provider of cloud-based services for electronic health record (EHR), practice management, and care coordination, is expanding its operations nationally, including within Austin at the iconic Seaholm Power Plant.