Guerra will join the Knights from the Sydney Roosters, where he has currently played 140 NRL matches since his debut in 2010.
The 29-year-old forward is a key signing for the Club.
“Aidan will be a great addition to our young side,” CEO Matt Gidley said this week.
“Aidan is a representative and premiership-winning player who will bring athleticism, experience and leadership to our team from a very successful career to date.”
While pleased with Guerra’s signing, recruitment remains ongoing at the Club.
“The Club will continue to monitor the player market and recruit players who can complement the emerging players in our roster,” Gidley added.
Knights 2021 Player Movements
Tyson Frizell (St George Illawarra Dragons, 2023), Dominic Young (2023)
Herman Ese'ese (Gold Coast Titans), Tim Glasby (retired), Blake Green (Canterbury-Bankstown Bulldogs), Aidan Guerra (retired), Andrew McCullough (Brisbane Broncos)
Mitch Barnett (2023), Jirah Momoisea (2022), Kalyn Ponga (2024), Daniel Saifiti (2022), Jacob Saifiti (2022), Pasami Saulo (2022), Enari Tuala (2021), Connor Watson (2021)
|Off Contract 2020|
Brodie Jones, Josh King, Mason Lino, Tautau Moga, Chris Randall, Tyronne Roberts-Davis