Justin Cochrane will join Frank at Tottenham as the Dane’s assistant, despite efforts from the Bees to keep hold of the England coach.
Frank has also brought head of performance Chris Haslam and first-team analyst Joe Newton with him from Brentford, while another assistant coach, Andreas Georgson, arrives from Manchester United.
Frank first joined Brentford as an assistant in 2016, before taking over from Dean Smith as head coach in October 2018.
In 2019-20 his side reached the Championship play-off final but suffered a 2-1 defeat by Fulham.
They reached the Championship play-off again the following season and beat Swansea City to reach the Premier League, with Frank becoming the first Brentford manager in 86 years to win promotion to the top flight.
Since then, Frank has established the Bees as a competitive Premier League club, recording 13th, ninth, 16th and 10th-place finishes.
Last season Brentford’s tally of 66 goals in the Premier League was the joint fifth best in the division.
Of the 152 top-flight games Frank has overseen, he has won 54 and lost 60 – claiming 200 points from a possible 456.
