A current Member of Parliament from Gampaha District, he was a former state minister of Mahaveli Development and Environment.
And also He ranked island 9th in Advance Level exam in year 1982 in math stream and entered to University of Moratuwa Sri Lanka.
Mannapperuma joined the United National Party and entered local government politics.
He entered parliament in 2013 from the Gampaha District following the unexpected demise of Jayalath Jayawardena.
He withdrew his candidacy after submitting nominations for 2024 parliamentary election, criticizing party leader Sajith Premadasa for dismissing him as SJB chief organiser for Gampaha electorate.