The Sydney Roosters duo have both been linked with exits from Bondi, with Volkman already signing on with the Warriors for 2023 in a highly-touted move for the NRL's New Zealand-based club.
While Volkman has signed until the end of 2025, Lussick is only on a contract with the Warriors until the end of 2022.
After a short loan stint at the St George Illawarra Dragons last year, the hooker will join the Warriors where he will likely play second fiddle to Wayde Egan - although Taniela Otukolo is also in the squad.
Volkman's position is far more certain given the club's likely future plans for him on a new deal, however he will have to battle with Chanel Harris-Tavita and Daejarn Asi to see first-grade time this year - as well as the arriving Luke Metcalf in 2023.
Both players have already joined Warriors training in Redcliffe on Monday, with general manager of football Craig Hodges saying the club are thrilled with the signings.
“We’re thrilled to be able to add Ronald and Freddy to our squad right now,” Hodges said.
“We were keen to have Ronald onboard for the rest of this season rather than waiting for 2023. It’s beneficial for him and for us to have him settled into the club sooner rather than later.