Brisbane coach Kevin Walters has called on the NRL to provide more mental health care resources for those working in the game.

Brisbane coach Kevin Walters has urged the NRL to offer more mental health support to players, coaches and staff following the sudden death of Paul Green.

The rugby league world has been in mourning since North Queensland's premiership-winning coach was found dead at his Brisbane home on Thursday morning.

Walters is among leading NRL figures finding it difficult to come to terms with Green's death.

A former teammate of Green's at State of Origin level, Walters said more needed to be done.

"It's important that we check on each other each day, particularly with the mental health side of things," Walters said.

"It's something that I believe the NRL need to put more focus on, particularly around our players and our coaches and our support staff - everyone involved in the game.

"We've just got to make sure that there's someone there if you want to reach out."

Manly's Des Hasler played against Green in the 1990s and coached against him.

"He always struck me as very friendly, at coaches conferences or different times we caught up after the game, he was always available for a chat," he said.

"It's a real shock."

The NRL offers a free and confidential counselling to its players and staff and also works with mental health organisations to offer specialist referrals.

Hasler said Green's death had brought mental health to the top of the NRL agenda.

"When it happens close to you, it brings that whole issue home," he said.

"It's obviously something that we need to be mindful of and the awareness and the community aspect are really important.

"We really need to be watchful and careful of each other."

When he arrived at the Sydney Roosters in 2013, coach Trent Robinson hired Green as an assistant, having been impressed by a CV that boasted two Queensland Cup premierships with Wynnum Manly and an apprenticeship under Wayne Bennett.

"I still remember his first session," Robinson said.

"We were getting all of our systems in play but he got straight into the coaching.

"He was really confident about his knowledge and he got into it in his own style with his really forthright approach and the players really loved him for that."

That season, Green relayed messages from Robinson to the team during games, scouted oppositions and worked with players in the spine on the run to the Roosters' 2013 grand final victory.

Green left the club after the premiership win to coach the Cowboys but remained close with Robinson and the staff at the Roosters.

"He was just an amazing coach and an amazing guy," Robinson said.

"His humour and brutal honesty were really important and his vision as a coach was special.

"(Green's death) highlights the personal side of what we do and the need for support.

"Sometimes, you need to reach out."

Lifeline 13 11 14

beyondblue 1300 22 4636