Conor O'Shea and his backroom staff have agreed new contracts at Aviva Premiership side Harlequins.
The Irishman has committed his future to the club as director of rugby along with head coach John Kingston and skills coach Collin Osborne.
The decision of the trio to extend their deals to the end of the 2015-16 season gives the club a settled rugby management team after first XV coach and academy manager Tony Diprose and backs coach Mark Mapletoft signed new contracts last year.
The current coaching staff have overseen the most successful period in the club's history, delivering four trophies in three seasons - the Amlin Challenge Cup in 2011, the Aviva Premiership title in 2012 and the Aviva A League and LV= Cup in 2013 - to The Stoop.
In a statement on the Quins' website, chief executive David Ellis said: "We are delighted to have retained the services of the coaching team that has delivered the most successful period in the professional history of this great club.
"Their extensive experience of managing players at the top end of the game in this country has been fundamental to Harlequins' recent progress.
"I am confident that will continue given the quality of young English talent we have coming through our player development programme."
O'Shea said: "I am very privileged to be asked to continue as director of rugby at Harlequins and would like to thank the club's owners and the board for this opportunity.
"Every day I go into the club I meet a group of coaches, players and support staff that wants to be the best they can be and wants to bring success to a club that belongs at the top of the game.
"We are ambitious to ensure that what we are building here is a lasting legacy, that we play rugby in a style that our supporters enjoy and is true to the tradition of this club, a club that will celebrate its 150th anniversary in 2016."