She is also a mid-level practitioner at Cascade Valley Hospital in Arlington, Washington, United States.

[5] In April 2020, CONCACAF recognized Koroleva for her service as a frontline healthcare worker during the COVID-19 pandemic.

[6][7] Koroleva began officiating at the age of 15 in order to help pay for youth soccer fees in the Midwest Regional League.

[9][10] In August 2016, Koroleva was appointed to be a referee at the 2016 FIFA U-17 Women's World Cup in Jordan.

[17][18] Koroleva was born in the Soviet Union, and her family migrated to Denmark, then to Iowa.