The 49-year-old highly-rated coach joins from Queens Park Rangers, where he has been working as assistant manager to Ian Holloway since 2016.

Former Republic of Ireland international Fleming brings a wealth of experience, having enjoyed previous coaching and assistant managerial roles with Crystal Palace, Bolton Wanderers, Livingston, and Hartlepool United, where he worked alongside another ex-Boro favourite, Craig Hignett.

Fleming is well-known to Boro fans, having made over 300 appearances during a 10-year career that saw him win three promotions to the Premier League and be a part of the squad that reached the League Cup final twice and the FA Cup final in 1997.

Fleming will further strengthen the backroom team assembled by Tony Pulis since his arrival on Boxing Day.

His time at QPR came to an end on Saturday with a 1-0 win against Barnsley, and he will need little introduction when he meets the Boro squad at Rockliffe on Monday.