The inquiry of Army Col. Robert W. Saum's conduct comes just a few months after his predecessor abruptly resigned. Lawmakers had criticized the office for not moving quickly enough to improve care for troops with brain injuries and psychological trauma, the signature wounds of the wars in Iraq and Afghanistan.
Saum was traveling in London and could not be reached for comment, his executive assistant said. He was appointed acting director of the Defense Centers of Excellence for Psychological Health and Traumatic Injury in late June when Army Brig. Gen. Loree Sutton left the post. The office's rapid turnover and the current investigation are likely to draw more criticism from Capitol Hill.
In an e-mailed statement, Pentagon spokeswoman Cynthia Smith said "there was recently a complaint against Col. Saum relating to personnel management," but she provided no further details. The complaint "was very promptly referred for appropriate investigation, which is proceeding," she wrote. Smith also said the process for selecting a new director is proceeding.
A Defense Department official familiar with the case said Saum has been accused by an employee in the office of unwanted sexual advances and creating a hostile workplace. The complaint was filed in August with the department's inspector general, said the official, who requested anonymity in order to discuss sensitive information related to an ongoing investigation.
Gary Comerford, a spokesman for the Pentagon inspector general's office, said that as a matter of policy the office does not confirm or deny the existence of investigations.
Saum is a highly decorated officer with a doctorate in cognitive studies, according to his official military biography.