In the mid-1990s, Sten was a founding member of X-PAC, a group of politically minded young citizens, and has participated heavily in the Oregon Bus Project.[2]
Sten was first elected to Position 2 on the Portland City Commission in 1996, defeating Chuck Duffy. He ran successful campaigns for re-election in 1998, 2002, and 2006.[3]
As a Commissioner, Sten was an early supporter of Portland's publicly financed elections system.[4] In 2005, he was named as one of Oregon's 15 most influential people.[5]
He resigned from his position April 4, 2008, and was succeeded by attorney Nick Fish.
After leaving office, Sten relocated to Seattle, Washington. In 2019, it was announced that Sten had joined Strategies 360, a political consulting and lobbying firm, as an advisor.[8]