He gave up that job last month after a former student accused him of having an inappropriate relationship with her when she was a 14-year old freshman.
"My client's been a good family man, he's been an exemplary teacher at the school for the past ten years and his record is unblemished. So he categorically denies any of the allegations that were made against him," Clugston's attorney, Martin Mullaney.
Clugston resigned in March to "protect the school" said Mullaney.
Court documents outline a secret "inappropriate" relationship that Clugston and the student allegedly carried out during the 2002-2003 school year. The two would meet in the school's newspaper office and with lights off and blinds drawn, they would kiss, Clugston would remove the girl's top and the two would fondle each other, according to court documents.
The victim came forward last month and talked to school officials about the allegations.
School officials reported to police that Clugston, 44, confessed to them about the relationship, calling it a colossal mistake.
"My client never confessed to the charges and he was absolutely broadsided with the allegations against him," said Mullaney.
Clugston is charged with indecent assault, child endangerment and corruption of a minor.