The school district has chosen Melissa Dlugolecki to oversee its sports programs. She will be taking over as athletic director for Ted Dever, who was fired by the school district in March. Dlugolecki is an assistant athletic director and a special education teacher at Holliston High School, according to an announcement by Superintendent Kathleen Bodie. The issues leading to Dever’s dismissal included a string of forfeitures by Arlington High teams that the district said were the result of ineligible players being allowed to participate on a dozen teams during the 2011-2012 school year. Dever’s lawyer, Rick Grundy, said he has filed a grievance to fight the district’s decision. At the time of his firing, Dever was on paid administrative leave in connection with an ongoing criminal investigation about which police have disclosed few details. Robert DiLoreto, the high school’s dean of students, was serving as interim athletic director after Dever was put on leave, and was praised by the Massachusetts Interscholastic Athletic Association for uncovering and acting on the athletic rule violations. As the school system’s athletic director, Dlugolecki will receive an annual salary of $78,000 to $88,000, with the final details of her contract still under negotiation, Bodie said.