He later played for Notts County, Northampton Town, Sheffield Wednesday and Peterborough United before joining then Football Conference side Barnet in 2003, having been on loan there six months previously.

Joining up with his mentor Peter Shreeves, who has coached him at Tottenham and Sheffield Wednesday, he captained the club in their return to the Football League in his second season, and remained a key player for four years.

At the end of the 2006–07 season, Hendon was initially not offered a new playing contract by Barnet, but was given the chance to join Paul Fairclough's coaching staff.

[1] As a player Hendon featured in the PFA Third Division Team of the Year three times, once each with Leyton Orient (1996–97), Notts County (1997–98) and Northampton Town (1999–00).

Performances improved under Hendon, and some adept loan signings including Paul Furlong, Matt Lockwood, Jake Cole and Yannick Bolasie helped to drag The Bees away from the relegation battle and to mathematical safety with four games to spare.

[12] On 28 May 2015, it was announced Hendon would be returning to Brisbane Road as Leyton Orient's new manager, replacing Fabio Liverani following the club's relegation to League Two.