 Chalmers moved on loan to Conference championship chasing Oxford United on 5 March 2010 for the rest of the season, joining fellow Shots player John Grant who made the same move a week earlier.He made his debut a day later coming on for Chris Hargreaves in the 2–1 home defeat to Hayes & Yeading.Chalmers was released by Aldershot at the end of the 2009–10 season and subsequently signed for Macclesfield Town in June 2010, initially on a one-year contract.