The Trøndelag Labour Party chose Per Olav Skurdal Hopsø as their candidate for county mayor.

[10] After the 2023 local elections, Labour's coalition partner the Centre Party joined the conservative block in order to get the county mayor position, thereby putting an end to Sandvik's term.

[12] Between 23 August and 31 December 2024, he served as acting minister of climate and the environment when Andreas Bjelland Eriksen went on paternal leave.

[15] Sandvik was part of the Norwegian delegation at COP29 in Baku and led negotations at the conference concerning emissions cuts together with his South African counterpart, Dion George.

[16][17] By the end of the conference, he expressed that the countries had reached a solution and explained that Norway would be contributing with 3000 billion NOK in annual funding until 2035.