[1] Malosi was raised in Bluff and Invercargill in the South Island of New Zealand.

Malosi's parents were immigrants from Samoa; her father, Tusi, worked on wharves and her mother, Jane, was a hospital cleaner.

[3] In 1994, together with La-Verne King and Aliʻimuamua Sandra Alofivae, Malosi founded a law firm in South Auckland, a partnership of three Maori and Pacific Island women lawyers.

[5] From May 2013 to July 2014 Malosi served as Samoa's first Samoan female Supreme Court Judge.

She also began the work to found the Alcohol and Other Drug Treatment Court.