On January 5, 2010 United announced that Olsen would continue to work for United as an assistant coach under head coach Curt Onalfo. On August 5, following a league-worst 3–12–3 start to the season, head coach Curt Onlafo was fired. Subsequently, Olsen was named interim head coach and completed the season with a 3–8–1 record. Although United officials interviewed at least seven candidates, including Hertha Berlin manager Lucien Favre, the club appointed Olsen to the head coaching position. United made a public announcement on November 29, 2010 and held a press conference in the same room Olsen had announced his retirement one year and one month earlier. Olsen signed a three-year guaranteed contract that made him United's seventh head coach in club history and youngest full-time head coach in the league's 15-year history. This occurred despite the fact that United President and CEO Kevin Payne had continuously ruled him out during the months leading up to the decision.