According to The Daily Telegraph's David Riccio, the Chooks are nearing a two-year deal with the 26-year-old.
— David Riccio (@DaveRic1) July 22, 2021
Unsigned past this season, the New Zealand international has gained interest in the past, being linked to Cronulla, St George Illawarra and North Queensland earlier this season.
Atoni has been a valuable asset for the Bulldogs in 2021, playing 12 matches in his fourth year at Belmore.
The Canterbury forward is one of 13 players yet to be re-signed under coach Trent Barrett from 2022, while a host of high-profile backs have been recruited to join the club at season's end.
Barrett's recruitment drive had seen a lack in arriving forward options, with that call for concern put to rest with the signing of released Bronco Tevita Pangai Junior from 2022.
However, the potential loss of Atoni is only set to open holes in Barrett's attack once again.
The club has been linked to delisted Dragon Paul Vaughan, but a move may now be hindered following due to the impending arrival of Pangai Junior.
According to Riccio's report, the two-year deal is set to pocket Atoni close to $150,000-per-season.