CHICAGO -- The Chicago Bears moved swiftly to begin filling out their coaching staff under new head coach Marc Trestman by reaching an agreement with Aaron Kromer to serve as the team’s offensive coordinator/offensive line coach, sources told ESPN NFL Insider Adam Schefter.

Kromer has been with the New Orleans Saints since 2008 where he handled the running backs for one season before shifting over to coach the offensive line. Kromer was the Saints’ interim head coach for the first six games of the 2012 season with Sean Payton suspended for the entire year and Joe Vitt unavailable for the opening six games. New Orleans went 2-4 with Kromer at the helm.

The working relationship between Kromer and Trestman dates back to 2001 when two men were both on the staff of the Oakland Raiders. Trestman arrived in Oakland as the quarterbacks coach that year before being promoted to offensive coordinator the following season when the Raiders reached the Super Bowl. Trestman left Oakland after the 2003 campaign. Kromer spent 2001-04 with the Raiders where he coached the offensive line his final three years with the organization.

Kromer also had a stint with the Tampa Bay Buccaneers and worked collegiately at Northwestern University and Miami University.