The headmaster of Charleston's Porter-Gaud School resigned Tuesday after less than two years on the job. His resignation was accepted by the school's board of trustees.

Dr. Christian Proctor took over in September 2007. He offered his resignation during the school's last board of trustees meeting for the year.

"He decided to move on, and we accepted that decision," Dwayne Green, chairman of the board, said afterward.

Green said the board was "very happy" with some of the accomplishments Proctor achieved in the past two years. The decision to part ways was mutual, he said. "We got to the point where we wanted to move on," he said, adding, "We wish him the best."

Proctor, 46, said his resignation came during the annual evaluation and contract process, but that he remained committed to Charleston.

Mark Stephens, a former Porter-Gaud parent, moved his son to another school last year because of what he said were problems he associated with Proctor. Specifically, he was told there would be two certified teachers in every first-grade classroom, but that turned out not to be the case, he said.

Proctor was the fifth headmaster in the school's history. He served as headmaster at St. Martin's Episcopal School in New Orleans for two years prior and at Grace Episcopal School before that.

A search advisory committee for a new headmaster has been assembled. DuBose Egleston, assistant head for finance and operations, will assume Proctor's responsibilities.