In 1945, it affiliated to the Finnish Federation of Trade Unions (SAK), but it left in 1956.
In 1969, it joined the SAK's successor, the Central Organisation of Finnish Trade Unions.
By 1984, it was unhappy with the federation's links to the Social Democratic Party, so it transferred to the Confederation of Salaried Employees (TVK).
However, that year the TVK went bankrupt, and the union transferred to the Finnish Confederation of Professionals (STTK).
[4] As of 2020, the union has about 11,000 members, including 90% of serving police officers in Finland.