[3][4] In 2021, she won the gold medal in the women's +87 kg event at the Pan American Weightlifting Championships held in Guayaquil, Ecuador.

[6] In September 2023, Theisen-Lappen won the silver medal in the women's +87 kg event at the World Weightlifting Championships held in Riyadh, Saudi Arabia.

[1][2] In October 2023, she won the gold medal in the women's +81 kg event at the Pan American Games held in Santiago, Chile.

[7] In December 2023, Theisen-Lappen won the gold medal in the women's +87 kg at the 2023 IWF Grand Prix II in Doha, Qatar, with a total of 283kg.

[8] In August 2024, she finished in 5th place in the women's +81 kg event at the 2024 Summer Olympics held in Paris, France.