One of three candidates interviewed for the role on Thursday, along with David Furner and interim coach Dean Young, the former Brisbane and Penrith mentor got the nod.

The 54-year-old became the favourite for the role once priority candidate Craig Fitzgibbon spurned interest to see out his contract as assistant to Trent Robinson at the Roosters.

It will see Griffin resume the career that's seen him coach173 first grade games with Brisbane and Penrith, the latter sacking him in 2018 despite edging towards a top-four finish.

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The quest for a new coach had reportedly divided the board, but CEO Ryan Webb said it was ultimately an unanimous decision to go with Griffin.

"Anthony is an experienced operator with a proven track record across his previous seven seasons as a head coach," Webb said.

"The board of directors were unanimous in their decision on Monday afternoon in appointing Anthony ahead of the other candidates.

"Anthony has missed finals football only once which speaks to the strong discipline and ability to develop young talent of which he has exhibited both throughout his career.

"The next steps for the Dragons are now determining the correct framework and structures to put around Anthony and the football department to ensure his tenure as coach is a successful one."

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Current interim coach Young is tipped to stay on as an assistant - and possible long-term successor - to Griffin, a relationship that's brought success with Tonga at Test level.

"There is no doubt that St George Illawarra is one of the biggest and proudest clubs in the game and I am excited to commence my role as coach later in the year," Griffin said.

"While results may not have gone in the club's favour in recent years, I see many a positive in the playing squad and the current crop of juniors currently coming through the ranks.

"My goal is a simple one, to ensure the Dragons are a club that every member, partner and fan can be proud of moving forward."

The Dragons' squad will feature Gerringong trio Tariq Sims, Korbin Sims and Jackson Ford, Albion Park-Oak Flats' Adam Clune and Shellharbour's Trent Merrin in 2021.