Castleford Tigers chief executive Steve Ferres has made the decision to leave the club with immediate effect.
Ferres said: “In the short time I have been at the club, a successful membership scheme, fast approaching 4,000, has been launched which has seen season ticket sales increase on the previous year by 25 per cent.
“It has brought in much needed revenue to the club and in doing so, provided a model which can and should be the catalyst to help sustain a viable business.
“As CEO I believe I have a moral obligation to everyone associated to the Tigers from its staff to the players and right through to its loyal fans. Since the board is not in a position to support the multitude of changes that I believe must take place now in order for Castleford to continue to compete at Super League level, I feel I have no option other than to offer my resignation.
“I am an extremely proud man and a proud Castleford man at that so please rest assured that this decision was not made lightly.
“I would like to thank the fans for their fantastic support and indeed the staff for their hard work in implementing the new membership scheme. The club requires significant investment in order to continue and I truly hope the board can secure the necessary financial support in the coming months.
“I have informed the board that I am willing to offer my support in an advisory capacity should it be required.”