 On 14 June 2016, Wallin was chosen as the chairman of the Swedish Parliamentary Group, after the previous chair Anna-Maja Henriksson had been elected as the leader of the party.In February 2018, Wallin announced that he wouldn't take part in the 2019 parliamentary election.In April 2019, soon after the parliamentary election, Wallin was announced as the new CEO of Miltton Networks.