Ethan Dobbelaere was born in Seattle, WA. He started his soccer career with Seattle Sounders FC, where he joined the academy at the age of 11. He signed his first professional contract with the Sounders in 2020, becoming a Homegrown Player. He made his MLS debut in the same year, and went on to make 17 appearances for the club.
He also played for Tacoma Defiance in the lower divisions. In 2022, he was loaned to Czech club MFK Vyškov for a short spell. He returned to Seattle in 2023, but was picked up by D.C. United on waivers at the end of the season.