One week after being denied a return to the NRL, Lomax has now officially linked with the WA outfit for the rest of the 2026 season as well as next year.
That will allow him enough time to attempt to crack the Australian squad for next year's home Rugby World Cup, before a return to rugby league is allowed in 2028.
"Like any player, the dream of one day representing the Wallabies on a truly international stage and potentially competing at a Rugby World Cup is a powerful motivation," Lomax said.
"This is a huge opportunity and a challenge I'm really looking forward to embracing. Stepping into a new code will push me as a player and that's something that genuinely motivates me.
"The chance to be part of what the Western Force are building and to test myself at the highest level of rugby union is something that really excites me."
The NSW State of Origin star had attempted to sign with Melbourne for this year's NRL campaign, after leaving the Eels in October to join the abandoned R360 competition.
However a clause in his Parramatta release meant he could not join another club until the end of 2028 without the Eels' written consent.
Lomax's push to play for the Storm regardless was set for a NSW Supreme Court hearing last week, before the parties agreed to a deal that allowed him to return to the NRL in 2028.
Court documents in that case also revealed he had received an initial offer from Rugby Australia last December that was below the $700,000 a year he was receiving at Parramatta.
A revised offer from Rugby Australia four days later also fell below the mark, but the Force confirmed on Monday they had remained in contact with Lomax ever since.
The 26-year-old's code swap comes after Joseph-Aukuso Suaalii did likewise at the end of 2024, while Blues teammate Angus Crichton is bound for the NSW Waratahs.
Crichton, who played the 15-man game growing up, said he had felt for Lomax through the Eels ordeal but backed him to make it in rugby.
"He put himself in that position so I'm not going to say I felt sorry for him, but as a person you do have care for people," Crichton said.Â
"He was in a pretty compromised position but it's good to see that he's come out of it because he's a quality player.
"He'll be good (at rugby). He's a great athlete, he's a good player. He'll go well wherever he is."
Crichton's backing comes after Suaalii labelled Lomax a "special player", capable of cracking the Wallabies set up.
"I think a lot of rugby people would love for him to come across," Suaalii said last week.
"He can definitely play the game, I believe.
"Zac has the aerial ability, he can kick a ball, he's strong, he's fast. He's a very good rugby league player."
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