Roberts, a Towson resident who took over as principal at Perry Hall in 2008, has improved the school greatly since his arrival, Marks said.
But what distinguished Roberts this year was his leadership on the first day of classes, when 15-year-old Robert Gladden shot classmate Daniel Borowy on Aug. 27.
"George Roberts would stand apart even if the shooting never occurred on Aug. 27," Marks said in a statement.
Marks said Roberts is "one of the best principals" in his alma mater's history, "but the shooting really demanded a special type of leader."
"There were many individuals who provided extraordinary assistance that day, from the heroic faculty who restrained the gunman to our public safety professionals, but Mr. Roberts set the tone of leadership that was needed on Aug. 27 and the days afterward," Marks said.
Roberts will be given a resolution from the County Council in recognition of the honor.