Middlesbrough first team coach Steve Harrison has left the club after seven years at the Riverside Stadium.
The 59-year-old joined from Aston Villa to work alongside former manager Steve McClaren in 2001, but has suffered with health problems in recent seasons.
Previously Harrison had a spell coaching England under Graham Taylor and also coached Watford, Millwall, Crystal Palace, Wolves and Preston.
Steve Agnew steps up from reserve team to take over as first team coach.