Since 2003, Berg has been a flight attendant for Endeavor Air. She has also worked as a union organizer and representative. She worked as a union steward for United Steelworkers and the Association of Flight Attendants, and as director of the Minnesota Fair Trade coalition.[4][5]
Berg was elected to the Minnesota House of Representatives in 2020 and was reelected in 2022. She first ran after one-term DFL incumbent Alice Mann announced she would not seek reelection. In the general election, Berg defeated former Republican state representative Roz Peterson, who represented the district before Mann.[9] In 2020, Berg had her election results challenged, but a judge dismissed the case for failing to state a claim and a lack of subject-matter jurisdiction.[1]
Berg is the vice chair of the Labor and Industry Finance and Policy Committee, and sits on the Education Policy and State and Local Government Finance and Policy Committees. She also serves as an assistant majority leader for the DFL House Caucus.[1]
Berg is a member of the Reproductive Freedom Caucus, and is pro-choice.[10] In February 2022, in response to high gas prices, she joined other DFL legislators advocating for a temporary repeal of the state gas tax.[11]