Plaid Cymru have chosen Vale and town councilor Ian Johnson to stand as their general election candidate on June 8.
He said the incinerator was a key local issue, and that nationally it was important Wales had a strong voice during Brexit negotiations.
Coun Johnson was recently re-elected to the Vale Council and Barry Town Council, finishing first in Buttrills ward in the centre of the town and increasing his vote.
He currently works as a mental health researcher, and has previously taught at Cardiff University and been an award-winning researcher at the Houses of Parliament – as well as a sports reporter for The GEM.
He said: “My experience as a local councillor and working for a mental health charity means that I understand the real world impact of another Conservative government cutting spending and cutting our public services.
“The Labour Party are now in complete chaos and cannot form a coherent opposition, never mind an effective government – just look at the mess they’ve made over the Barry Docks incinerator.
“Plaid Cymru are taking this election seriously. We will continue to fight the incinerator and stand up for the needs of Barry and the Vale, providing a strong voice for Wales in Brexit negotiations in order to protect investment and jobs.”