Following
Milton Keynes Dons' appointment of
Karl Robinson as manager in 2010, the club created a recruitment division and named Mitchell as the club's first Head of Recruitment.
[17] He was notably responsible for the signing of former England international
Alan Smith.
[18]
In January 2012, Mitchell joined
Championship club
Southampton as Head of Recruitment.
[19] The club gained promotion to the
Premier League in his first season and Mitchell began working with
Mauricio Pochettino following his appointment in January 2013. He oversaw the signings of players including
Nathaniel Clyne,
Maya Yoshida,
Paulo Gazzaniga and
Steven Davis.
[20][21][22][23]
Following Pochettino's move to
Premier League rivals
Tottenham Hotspur, Mitchell completed his switch in November 2014 to link up with the manager.
[24] He helped the club sign players such as
Dele Alli,
Son Heung-min,
Kieran Trippier and
Toby Alderweireld.
[25][26][27] In August 2016, reports suggested Mitchell was to leave the club "after his dream job turned into a nightmare" and he had fallen out with chairman
Daniel Levy.
[28] In December, it was revealed Mitchell was serving his 16-month notice period.
[29]
In February 2018, Mitchell was named Head of Recruitment and Development by
Bundesliga club
RB Leipzig.
[30] In his first transfer window with the club, Mitchell helped sign
Matheus Cunha and
Nordi Mukiele, as well as
Arsenal youth prospect
Emile Smith Rowe on loan. Mitchell attracted interest from several Premier League clubs throughout 2019 and was heavily linked to a move to
Manchester United.
[31][32] Reports suggested he could be offered an expanded role as Technical Director to oversee Red Bull's global football – including
FC Liefering,
Red Bull Salzburg and the
New York Red Bulls[33]
In June 2020, Mitchell joined
Monaco as sporting director.
[34][35]