PM Nilsson has previously been political editor at the newspaper Dagens industri and was also head of editorial at Expressen.
In November last year, he was employed as a state secretary in the government office.
After initially lying about the crime he was convicted of illegal eel fishing, he resigned on 26 January.
At Timbro, PM Nilsson will run climate, environmental, urban and rural issues.
- PM Nilsson deeply understands the connection between business conditions and the design of climate policy.
We are very happy that he chooses to come to us in tough competition with others, says Benjamin Dousa, CEO at Timbro in the press release.