Castle, who has has been in the role for four years, said it was time for her to consider her "next challenge".

The former New Zealand netball boss is one of the most influential women in the game and is expected to remain in sports administration.

"Raelene has made a significant contribution over the last four years," said Bulldogs chairman Ray Dib.

"She has strengthened all areas of the club and will leave us in a strong position for the new chief executive to take over.

"We are appreciative of her professionalism in signalling this early enough for us to find a replacement in time for next season."

In a press release, Castle added: "I have loved every moment of my time at the Bulldogs and after four years in the role, the time is now right to look for my next challenge. I wish the club and the team every success for the future.

"I am pleased that together with the board we could give the club leadership continuity and a professional transition to new leadership."

Castle's resignation comes two weeks after reports of tension with Dib following an email Castle sent to rival clubs complaining about a breach in protocol by the players' union.

The Rugby League Players' Association was alleged to have met with a select group of club chairmen that was set up by Dib, over the ongoing collective bargaining agreement talks.

It is believed Castle forwarded the complaint, which was written by NRL salary cap negotiator Dean Kino to the RLPA, to club bosses.

Her decision also comes after the club this year controversially extended the contract of coach Des Hasler, and lured big names Aaron Woods and Kieran Foran for 2018.

It is widely tipped the Bulldogs, who were last week fined $61,474 for salary cap breaches in 2016, would have to offload some players to fit the star pair into their books next year.

with AAP