He served as chief and mayor of Moen from 1944 and was a member of both the Truk Congress and the House of Representatives of the Trust Territory of the Pacific Islands.

Born in Mwan in 1902, Mailo was educated at the Protestant Mission School at Anopouou.

[2] In 1965 Mailo was elected to the General Assembly of the new Congress of the Trust Territory of the Pacific Islands as the Moen representative.

The body was later renamed the House of Representatives and Mailo was re-elected in 1966, remaining in office until the 1968 elections.

[2] He died in Truk Hospital in September 1971 at the age of 68, survived by wife Chimako and eleven children.