Malifa’s talents were noticed by selectors while playing for Ponsonby and then the Eden Club in Auckland.

During his professional career, Malifa played flyhalf for the USA Hawks match against Canada West in the 2007 North America 4, notching all of his team's points through two converted tries and two penalty goals from two attempts.

Malifa played flyhalf for the United States national team since his debut against the England Saxons in 2007.

[5] Malifa played flyhalf for the United States national rugby sevens team, and was known for his excellent drop kick.

[6] Malifa led the U.S. in scoring during the 2009-10 IRB Sevens World Series with 120 points, helping the U.S. to its best ever 10th-place finish.