Billy Scott, a race engineer with MWR since 2008 and exclusive to the No. 55 the past two seasons, will take an elevated role in car set up and race weekend preparations.
Vickers will drive the No. 55 in the remaining 2013 races except at Talladega when two-time Daytona 500 champion Michael Waltrip climbs behind the wheel. Vickers won the July 14 race at New Hampshire Motor Speedway in the No. 55. The team is 19th in the car owner standings.
Miller is a 20-year motorsports veteran who joined MWR before the 2012 season and played a major role in bringing the team its first two Chase berths last year. He has served as crew chief for several teams during his career.