Andy Scott wrote a heartfelt message on Twitter to Brentford fans after starting work at Watford.
The former player, assistant manager, manager and latterly head of recruitment has been associated with the Bees, on and off, for 20 years.
And he paid tribute to the current squad as well as owner Matthew Benham, co-directors of football Phil Giles and Rasmus Ankersen plus the football department of Dean Smith, Richard O'Kelly, Thomas Frank, Rob Rowan and all other members of staff.
Scott wrote on Twitter: “The last few years have been an amazing experience and I believe the players in the Brentford squad can go on to achieve whatever they wish.
“I'm proud of what we've accomplished and signings we've made but without Matthew's belief in me, the support of Phil and Ras, the enthusiasm of Dean, Richard, Thomas and Rob as well as every member of staff I wouldn't have been in a position to be offered such an incredible role, so thank you.
“The fans, as ever, accepted my return and have always been generous in their support, for that I'll always be grateful.
“Working in the Premier League is everyone's ambition and to be able to join another forward thinking club with an exciting manager, with the responsibility of this role was one I couldn't refuse.
“20 years ago I became, not only a BFC player, but a fan too and that won't change. The dream is to meet in the Premier League. Until then it'll be the next result I always look for.”