[2] He played his junior rugby league for the Ellerslie Eagles and attended Marcellin College, Auckland before moving to Ipswich, Queensland in October 2013.

On 26 April, after starting 2019 as a development player, Mulitalo signed a contract extension and was immediately elevated into Cronulla's top 30 squad.

[6] A day later, he made his NRL debut against the Brisbane Broncos as a late replacement for Josh Dugan, who was injured during the warm-up.

[8] In Round 19 against North Queensland, Mulitalo scored his first try in the top grade as Cronulla won the match 16-14 at Shark Park.

[9] In Round 24 against Canberra, Mulitalo scored 2 tries as Cronulla lost the match 15-14 in Golden Point extra-time at Shark Park.

[11] Mulitalo played for Cronulla's feeder side Newtown in their Canterbury Cup NSW grand final victory over the Wentworthville Magpies at Bankwest Stadium, scoring a try in a 20-15 win.

[12] The following week, Mulitalo played for Newtown in the NRL State Championship victory over the Burleigh Bears at ANZ Stadium.

[18] He played 16 games for Cronulla and scored 10 tries in the 2021 NRL season which saw the club narrowly miss the finals by finishing 9th on the table.

[27] Mulitalo played a total of 23 games for Cronulla in the 2023 NRL season and scored 21 tries as the club finished sixth on the table.

[32] Mulitalo played 23 games for Cronulla in the 2024 NRL season and scored 18 tries as the club finished 4th on the table and qualified for the finals.