Ekaterina 'Katja' Koroleva

Ekaterina "Katja" Koroleva is an international soccer referee for the Professional Referee Organization (PRO), which she joined in 2013. Born in the Soviet Union, she represents the United States. She is also a mid-level practitioner at Cascade Valley Hospital in Arlington, Washington, United States. In April 2020, CONCACAF recognized Koroleva for her service as a frontline healthcare worker during the COVID-19 pandemic. Wikipedia