PROVIDENCE — A veteran Rhode Island State Police trooper has pleaded no contest to assaulting an off-duty Providence police sergeant at a fundraiser for a fallen officer last month.

Trooper Edward J. Stenovitch appeared in District Court on Wednesday and entered his plea on the misdemeanor count before Judge Madeline Quirk. She agreed to file the case for a year, meaning that the conviction will be erased from his record if he stays out of trouble for the next 12 months.

Quirk also ordered Stenovitch to have no contact with the victim, Sgt. Bernard “Teddy” Gannon and he must undergo anger-management counseling.

John D. Lynch, Stenovitch’s lawyer, said that he and Stephen Ryan, an assistant city solicitor for Providence, agreed on the settlement and penalty.

“It is a resolution that is apparently fair to everybody,” said Lynch, adding that Stenovitch enrolled in the anger-management program several weeks ago.

The trooper’s problems in the court system may be over, but he is far from out of the woods.

State Police Col. Brendan P. Doherty said that an internal investigation into Stenovitch’s actions will press on and he will move to have him terminated.

“He can no longer serve in the division of the state police,” Doherty said. “I take the matter very seriously and I will act accordingly in the very near future.”

Stenovitch, 41, a trooper for 15 years, was arrested last month for punching Gannon in the face at the Providence police union hall off Manton Avenue on Sept. 5. The police said the assault was unprovoked and took place around 3:30 a.m.

Stenovitch arrived at the union hall about 30 minutes earlier with his wife and a couple from North Providence.

Gannon suffered a broken nose and required hospital treatment, while Stenovitch was suspended from the state police with pay. Lynch said that the suspension remains in effect, while the state police continue an internal probe into the trooper’s behavior.

Lynch said that Stenovitch was assaulted in the union hall’s parking lot and suffered injuries including cracked ribs and a black eye. The trooper could not identify his assailants and no one has been charged with striking him.

The donnybrook occurred in the final hours of a fundraiser to raise money for the widow of Peter Rocchio, a Providence police officer who died of an apparent heart attack while driving in the city’s Mount Pleasant neighborhood last summer.

Police Chief Dean M. Esserman and his administrative staff took immediate action against the union hall, a watering hole for off-duty police officers. They filed a formal complaint with the city’s Board of Licenses for serving liquor well past the closing time of 1 a.m.

Two weeks ago, the board suspended the union hall’s liquor license for one day.

bmalinow@projo.com