He played scholastic hockey with St. Andrew's College in Aurora, Ontario from 2017–2019, collecting 60 goals and 68 assists for 128 points in only 93 CAHS league games.
Before commencing his collegiate career, Stienburg joined the Sioux City Musketeers of the United States Hockey League (USHL) at the tail end of the campaign and registered 1 point in 3 games.
[2] In committing to Cornell University of the ECAC Hockey conference, Stienburg as a freshman in the 2019–20 season contributed in a depth forward role with 5 goals and 10 points through 27 appearances.
[4] In making his professional debut with the Eagles, he posted 1 assist through 4 regular season contests and matching his output in the Calder Cup playoffs.
[7] He recorded his first career fight against former Avalanche, Nikita Zadorov, helping spark Colorado to mount an comeback in an eventual 5–3 defeat to the Boston Bruins.