Before joining Aetna, Callen was managing director and co-head of US health care investment banking at Credit Suisse First Boston (CSFB) and was co-head of the health care investment banking group at Donaldson, Lufkin & Jenrette prior to its acquisition by CSFB. In his banking capacity, he focused exclusively on providing strategic and financial advice to leading health care companies. Callen earlier served on the board of Sunrise Senior Living, Inc. He received his MBA from the Harvard Business School and a B.S./B.A. from Boston University.

Kohrt recently retired as president and chief executive officer of Battelle Memorial Institute (Battelle). While with Battelle, Kohrt oversaw six US National Laboratories for the Department of Energy, and was responsible for the management of 23,000 staff members and $4.8 billion in annual research and development. Before his time with Battelle, Kohrt served as executive vice president, assistant chief operating officer and chief technical officer for Kodak. Kohrt is lead director of the Scotts Miracle-Gro Company. Kohrt earned a B.S. from Furman University, a Ph.D. from the University of Chicago, and M.S. from MIT.

“We are very pleased that Craig and Carl have agreed to serve on KCI’s Board of Directors,” said Ronald W. Dollens, chairman of the board of KCI. “Craig and Carl both bring a great deal of finance and management experience to our Board. They also understand the critical importance of innovation to our health care system.”