David Weir is set to leave his Everton coaching role to take up the manager's job at League One side Sheffield United.
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The former Scotland captain, 43, has been reserve-team manager at Goodison Park since February 2012.
Weir was interviewed for the job at Bramall Lane last Friday, and is understood to have spent the weekend having further talks.
United have been looking for a permanent manager since the departure of Danny Wilson on April 10. Wilson left the club after a run of two wins in eight games effectively ended their automatic promotion challenge. They went on to lose to Yeovil in the League One play-off semi-finals.
Weir was one of three internal candidates interviewed for the Everton job in May following David Moyes' decision to leave for Manchester United.
Roberto Martinez was appointed as manager at Goodison Park on a four-year contract last Wednesday, and indicated that he wanted to retain Weir on the coaching staff.
The former centre-back, who played for Everton between 1999 and 2007, only retired as a player in 2012, having left Scottish club Rangers at the age of 41.
Following his Ibrox departure, he spent a brief period training with Sheffield United before returning to Everton as a coach.
Martinez is expected to bring assistant manager Graeme Jones, chief scout Kevin Reeves, goalkeeping coach Inaki Bergara and conditioning expert Richard Evans to Everton from his former club Wigan.
Everton assistant manager Steve Round, goalkeeping coach Chris Woods and chief scout Robbie Cooke are expected to follow Moyes to Old Trafford to take up coaching roles, as is Phil Neville, who has brought an eight-year playing stint at Goodison Park to an end.