Liberal MP Adrian Pederick’s first challenger for the 2018 state election has been revealed.
Mat O’Brien will contest the seat of Hammond for Labor.
Mr O’Brien, a Mobilong Prison worker, has previous experience as a candidate: he ran for Labor against Liberal Member for Barker Tony Pasin at the 2016 federal poll.
He won the third-most votes on that occasion, after Mr Pasin and the Nick Xenophon Team candidate.
On a visit to The Bend Motorsport Park on Tuesday, Mr O'Brien said the Labor Party intended to put more effort into its local campaign in 2018.
Hammond's boundaries will change at the upcoming election, drawing in Mannum and Karoonda and losing Goolwa.