Tungi is of high rank in both Tonga and Samoa, having hailed from both Tongan and Samoan Royalty.

Upon the passing of his father Fatafehi 'Alaivahamama'o Tuku'aho, the Honourable Sitiveni Polu Le'uligana inherited the title of HSH Prince Tungi in 2008 which was instated by the late King George Tupou V.[2][1] Tungi's estate consists of Tatakamotonga, Fua'amotu, Navutoka.

[1] Tungi often represents His Majesty King Tupou VI in an official capacity for Tongan functions and events.

In 2008, Tungi was appointed Lord Bearer of the Crown for the late King George Tupou V's coronation.

[3] In 2013, Tungi was a guest of honour for The Queen's Commonwealth Trusts baton relay.