Head coach Mark Anscombe has followed former director of rugby David Humphreys out of Ulster having left the province with immediate effect.
Former Ireland fly-half Humphreys stunned Ulster by quitting his position at the beginning of June to succeed Nigel Davies in the same role at Gloucester.
New Zealander Anscombe had moved to Belfast from Auckland ahead of the 2012/13 campaign, on a two-year contract, and in his first season in charge led Ulster to the final of the RaboDirect PRO12 and the Heineken Cup quarter-finals.
The Irish province again reached the last-eight of the Heineken competition last term but lost a thriller 17-15 to Saracens at Ravenhill.
Ireland assistant Les Kiss will take up the position of Ulster's interim director of rugby on July 19 ahead of a review of the province's coaching structures by the Irish Rugby Football Union.
Kiss is to continue assisting Ireland head coach Joe Schmidt and will combine his duties with the international side with his new role at Ulster.
Ulster Rugby chief executive Shane Logan said: “I would like to pay tribute to the contribution that Mark Anscombe made over the past two seasons and to thank him for his hard work and dedication. Everyone at Ulster Rugby wishes him well for the future.”
“Les Kiss will have an expanded remit for the province’s director of rugby and will lead the coaching staff, assisted by Jonny Bell and Neil Doak and will manage first team selection. His appointment allows us time to recruit for long-term success."