A Windham town employee has been arrested for an alleged sexual assault after the victim reported the crime to a victim’s advocate.

Robert Dobson, 55, of 5 Princeton St., Windham, was arrested the afternoon of Friday, Sept. 19, Windham Police Chief Gerald Lewis said.

Dobson was charged with aggravated felonious sexual assault for the incident, which court records alleged happened between July and September 2008.

Dobson works at the town’s transfer station/recycling center, and has for about 20 or 25 years, said David Poulson, the station’s manager. Poulson would not comment further on Dobson’s arrest.

According to court records, Windham police Sgt. Wendy Foley met with a guidance counselor at Windham Middle School on Tuesday, Sept. 16. The guidance counselor, identified in court records as Julie Lichtmann, told Foley a student had reported being sexually assaulted by Dobson.

Linda Wilmoth of the state’s Division of Children, Youth and Families interviewed the victim at the Child Advocacy Center in Derry, court records show, on Wednesday, Sept. 17.

During that interview, the victim described the alleged assault in detail, naming Dobson as the assailant.

At their weekly meeting on Monday, Sept. 22, the town’s Board of Selectmen discussed Dobson’s arrest in nonpublic session as a personnel matter. Police and town officials have released little else about the arrest.

After his arraignment, Dobson was released on $25,000 personal recognizance bail. He will appear in Salem District Court on Wednesday, Oct. 8, for a probable cause hearing.