This will also mean him becoming part of the Social Democrat party's executive committee, joining party leader Stefan Löfven, also from the IF Metall union.
Thorwaldsson was elected by a unanimous congress of union delegates. He spoke to the congress, attacking the centre-right government and Prime Minister Fredrick Reinfeldt, which he accused of destroying Sweden's welfare system, "we want social welfare for all. We don't discriminate." He also promised "we shall break the back of mass unemployment
LO represents the more blue-collar trade unions in Sweden, organising over 1.5 million workers. LO was central to setting up the Social Democratic Party in the early 20th century.
Karl-Petter "Kalle" Thorwaldsson, aged 47
Head of the Social Democrats' youth wing, SSU, between 1990 and 1995
Represents the IF Metall industrial union
Head of the workers' education association ABF
Owns an apartment, via the HSB cooperative, in Enskede, southern Stockholm