In 2002, Amundson went to work as an English language arts consultant at the Wisconsin Department of Public Instruction. Later, she became assistant director of the content and learning team, and then director of literacy and mathematics under the division for academic excellence. Finally, she was selected as chief of staff to Superintendent Tony Evers.[6]
After Evers was electedGovernor of Wisconsin in 2018, he named Amundson as his pick for Secretary of the Wisconsin Department of Children and Families. At the time of her selection, she was pursuing her Ph.D. in literacy studies.[4] Many of Evers' cabinet appointees never received a vote of approval or disapproval in the Wisconsin State Senate and served in an acting capacity. Amundson did not receive an official vote until February 2020, when her nomination was confirmed by a vote of 32-to-1.[7]
Amundson resigned from her role as secretary of the Department of Children and Families in September 2024.[8]
Amundson has also served on the Boards of Wisconsin Literacy, Cooperative Children's Book Center, Wisconsin Council of Teachers of English, and the Assembly of State Consultants of English Language Arts.[4]