 As of 2015, Seidel is a member of the Scandinavian American Theater Company, a theater company which has introduced several Scandinavian plays to the United States.In 2017, Seidel played Martha, a mysterious, free-spirited German stranger, in the Netflix mini-series "Godless", starring alongside Michelle Dockery and Jeff Daniels.In 2019, Seidel played the role of Hannah, mistress of Bob Fosse (Sam Rockwell) in FX television series Fosse/Verdon.