Hunslet director Darren Williams has resigned from his post and will leave the club at the end of the month.
Williams filled served in the role of director of rugby, while also working behind the scenes at the club as general manager.
Chairman Neil Hampshire admits that his departure will be a huge loss to Hunslet.
He said: “He has been the backbone of the Club for the last nine years and commands huge respect across the game from administrators, coaches and players alike.
“Knowledge and experience such as his is extremely difficult to replace.
“The club is currently looking at a new ownership model and, following a difficult last 12 months for the business, as well as changes in his personal life, having recently become engaged, Darren sees this as an opportune moment to step aside and allow the new regime to move the club forward.
“It’s important that we support and respect that decision.”
Williams said: “After much soul-searching, I’ve decided that the time is right to look for a fresh challenge.
“The last 12 months have been a difficult period for the club, and me personally, to say the least, and it’s definitely made me reflect on what the future holds for myself.
“Due to a change in personal circumstances I will also be relocating.”
The club says it exploring its options following Williams’ departure and that plans will be shared at an ownership meeting at the end of this month.