After attending the American Samoa Community College, he earned a Bachelor of Arts degree from the University of Hawaiʻi at Mānoa.

He received a master's degree in public administration from San Diego State University on July 30, 2012, a graduation ceremony held at the Governor H. Rex Lee Auditorium in American Samoa.

[2] Following his retirement, Mauga became the director of Army Instructions and continued to work with American Samoa's JROTC.

[2] In October 2011, gubernatorial candidate Lolo Letalu Matalasi Moliga picked Mauga as his running mate for lieutenant governor of American Samoa in the forthcoming 2012 gubernatorial election on November 6, 2012.

[4] In the 2024 American Samoa gubernatorial election, Mauga and his running mate Talauega Eleasalo Ale sought re-election but were ultimately defeated by Pulaali'i Tuiteleleapaga Iuli Nikolao Pula and Pulu Ae Ae Jr. in the runoff.