Northampton could have a new Central Services director by the end of the month. Mayor Gina-Louise Sciarra has appointed Angie Gregory to the job, pending City Council approval. Gregory currently works at Mount Holyoke College and has experience in sustainability, infrastructure and project management. She would replace Katie Deppen, who left in July for UMass Amherst. The council is expected to take up Gregory’s appointment September 17, with her first day scheduled for September 28.