Københavns Amt
Besides a very brief career as a trade unionist (2000–2001), Frederiksen has never had any employment outside politics. She was first elected to the Folketing in the 2001 general election, representing Copenhagen County. After the Social Democrats won the 2011 general election, she was appointed Minister of Employment by Prime Minister Helle Thorning-Schmidt. She was promoted to Minister of Justice in 2014. After the Social Democrats' narrow defeat in the 2015 general election, Thorning-Schmidt stood down and Frederiksen won the subsequent leadership election to replace her, becoming Leader of the Opposition.