Harlequins defence coach and academy manager Tony Diprose has signed a two-year contract extension.
The 39-year-old will now stay at the Twickenham Stoop until the end of the 2014-15 season.
He said: "I feel as though I am developing and learning hugely within our first-team coaching environment.
"I am looking forward to helping us build on this season's successes and also continuing to develop Harlequins Academy players."
Diprose, who retired from playing in 2006 after a 15-year career, took over as academy manager in 2008.
Quins director of rugby Conor O'Shea added: "Tony's contribution to Harlequins, both in developing the next generation of young players and his work with the first team, is nothing short of exceptional.
"I'm looking forward to working with him to develop us further as a coaching and playing group."