Maddalena got her start in competitive precision shooting on the state team as a California Grizzlies junior team member, competing in service rifle and being team captain. She credits this team for teaching her leadership and teamwork. She attended her first Civilian Marksmanship Program Highpower National Match at Camp Perry, Ohio during the summer of 2010. Sagen was awarded Distinguished Rifleman by the Civilian Marksmanship Program in 2011.
Maddalena competed on the University of Alaska Fairbanks Rifle Team[8] 2013–2018.[9] During that time she redshirted her first year and then competed the next four years. Maddalena is a four-time NRA First Team All-American in Air Rifle (2014–15, 2015–16, 2016-17 & 2017–18), three-time NRA First Team All-American in Smallbore (2015–16, 2016-17 & 2017–18), three-time CRCA First Team Aggregate All-American (2016, 2017 & 2018), and NRA Second Team All-American in Smallbore (2015). She Won Two Gold medals at 2021 President Cup in Wrocław[10] and Won Bronze Medal at 2022 President Cup in Cairo[11] Madalena Won Two Silver Medal and one Bronze Medal at 2022 World Cup.[12][13][14] She Won Silver Medal at 2021 World Cup in New Delhi.[15]
Maddalena won a silver medal at the 2024 Paris Olympics in the 50m rifle three positions event.[16]