Tameilau is the son of Moses Similai, who played rugby internationally.
[3] Tameilau attended San Francisco City College, then went on a religious mission, then played American football with the NCAA Division II West Texas A&M Buffaloes.
[4] In early 2016, he signed for the San Francisco Rush, North America's first professional rugby competition.
Tameilau was drafted to Currie in the Scottish Premiership for the 2018-19 season.
[6] In 2020 Tameilau played in the California Rugby League for the East Palo Alto Razorbacks.