After a Bachelor of Arts degree Accounting & Economics at the University of the South Pacific in Fiji in 1990, he became the finance manager of the Development Bank of vanuatu in 1992.
In 2001 he became CEO of the Asset Management Unit, a public agency working with the National Bank.
[1] On 23 March 2013, following Sato Kilman's resignation, Parliament elected Moana Carcasses Kalosil as Prime Minister.
Simelum replaced him, while Silas Yatan (Greens MP for Tanna) was given the Justice portfolio.
[3] Like other members of the Vanua'aku Pati, he crossed the floor on 15 May 2014 to help bring down the Carcasses government.