Ian Holloway adds Gibbs to backroom teamNigel Gibbs has joined Millwall as a first team coach.
The 49-year-old, who has extensive coaching experience, will support assistant manager Marc Bircham and boss Ian Holloway with the senior squad.
A right-back in his playing days, Gibbs spent his entire career with Watford and made over 450 appearances across a 19-year spell with The Hornets.
After hanging up his boots in 2002, Gibbs stayed at Watford in a coaching capacity, working mostly in the club's youth set-up and with their reserve sides.
Gibbs left Vicarage Road ahead of the 2005/6 season and took time boosting his coaching qualifications before taking a job as youth team manager at Reading in 2006. He impressed in that role and was promoted to the position of first team assistant manager, helping The Royals to promotion to the Premier League under Brian McDermott in 2011/12.
A former England U21 international, Gibbs left Reading in March 2013 following McDermott's departure as manager, but the pair were back working together just a month later at Leeds. Gibbs remained at Elland Road until February of this year.
Gibbs will begin work at Calmont Road immediately as the team prepare for Friday's Sky Bet Championship match against Bolton Wanderers at The Den.