The decision about whether an architect of Bush-era interrogation tactics will keep his license as a psychologist is in the hands of a Texas government agency.

A complaint against Dr. James E. Mitchell is now before the Texas State Board of Psychologists, alleging that he violated the profession’s rules of practice in helping the C.I.A. develop “enhanced interrogation techniques” for use in its so-called black prison sites during the Bush administration’s war on terror. Along with Dr. Bruce Jessen, a fellow military psychologist, Dr. Mitchell was a primary developer of post-Sept. 11 C.I.A. interrogation methods that are currently under a criminal torture investigation by the Department of Justice.

Dr. Mitchell, who did not respond to repeated requests for comment for this article, parlayed his experience in training American soldiers to survive as prisoners of war into a lucrative consulting business with the C.I.A. He orchestrated  and, according to the complaint, participated in  the harsh interrogation of terror suspects using sexual humiliation and the drowning technique called waterboarding.

Joseph Margulies, a Northwestern University law professor, and Dicky Grigg, an Austin lawyer, worked with a Texas psychologist, Jim L. H. Cox, to bring the complaint, which documents in lurid detail Dr. Mitchell’s role in the questioning of prisoners.