FFC Frankfurt II, 2015 Nadaner declared for the
2014 NWSL College Draft but was not selected. She joined the
FFC Frankfurt II reserve team during the
2014–15 2. Bundesliga.
Boston Breakers, 2016–2017 Nadaner returned to the United States after a season in Germany and joined the
Boston Breakers Reserves having previously played on the Breakers' college academy team during her time at BU. On July 15, 2016, she was called up to the first team as an amateur national team replacement player and made her Breakers debut two days later as a 61st-minute substitute in a 3–2 defeat to
Sky Blue FC. She was signed to a professional contract on August 29, 2016, and finished the season with seven appearances including three starts. Nadaner did not make any appearances in the 2017 season before being released on June 30, 2017, in order to clear a roster spot for
Katie Stengel.
Sparta Prague, 2017–2019 In August 2017, Nadaner signed a professional contract with
Czech Women's First League team
Sparta Prague. In her first season with the team, she helped Sparta win their first league title in five years. Sparta also won their ninth
Czech Women's Cup, beating
Slovácko 3–1 in the final in which Nadaner was named
Most Valuable Player. She was also named as the
2017–18 Czech Women's First League player of the season and club player of the season. In May 2018, Nadaner signed a one-year extension ahead of the
2018–19 season. The team defended both the league and cup as Nadaner was voted as Sparta's player of the season for the second consecutive season. During the 2019 cup final, Nadaner scored Sparta's only goal in a 1–1 draw with rivals
Slavia Prague but failed to convert her penalty in the ensuing
penalty shoot-out. In June 2019, she signed another one-year contract with Sparta Prague.
Atlético Madrid, 2019–2021 In August 2019, Nadaner was bought from Sparta Prague by Spanish
Primera División side Atlético Madrid for an undisclosed fee. She scored her first goal for the club on September 26, 2019, during the second leg of the
2019–20 UEFA Women's Champions league round of 32. With Atlético trailing the game 1–0 to Serbian side
Spartak Subotica, Nadaner scored an equalizer in the 83rd-minute to send Atlético through 4–3 on aggregate. After two seasons, Nadaner left upon the expiry of her contract.
Orlando Pride, 2021–present On July 5, 2021, Nadaner signed a two-year contract with
Orlando Pride. In June 2023, Nadaner was named to
NWSL Best XI of the Month, for the month of May. On December 7, 2023, Nadaner signed a three-year contract with Orlando Pride. As vice captain of the Pride, Nadaner made 25 appearances (24 starts) in the 2024 regular season as the team claimed the
NWSL Shield with the best record in the league. Her partnership with
Emily Sams helped set an NWSL record with 13 shutouts in the season; both center backs were among the five players nominated for
NWSL Defender of the Year, and Sams won the award. Nadaner played every minute of the playoffs as the Pride won their first
NWSL Championship with a 1–0 victory over the
Washington Spirit. On June 13, 2025, Nadaner played in her 100th match for the Pride. == International ==