2010-11: Danton Heinen appeared in six games — including two playoff contests — with the Valley West Hawks in British Columbia midget major hockey as a 15-year-old and played for the Langley Eagles midget team. He scored 1 goal with 2 assists for the Hawks.
2011-12: Heinen was the third-leading scorer for the Valley West Hawks in his first full season. He scored 19 goals with 24 assists and 6 penalty minutes in 37 regular season games and had 2 goals in two playoff games.
2012-13: Heinen appeared in two BCHL games with the Merritt Centennials and was the third-leading scorer for the Pacific Junior Hockey League champion Richmond Sockeyes. Heinen had 2 assists in his brief stint with the Centennials. In 43 regular season games with the Sockeyes he scored 21 goals with 28 assists and he scored 6 goals with 8 assists in 15 PJHL playoff games. Richmond captured the Cyclone Taylor (BC) and Keystone Cup (Western Canada) championships and in ten games Heinen scored 6 goals with 9 assists and 2 penalty minutes.
2013-14: Heinen moved from the PJHL to the BCHL and was a team captain and the leading scorer for the Surrey Eagles. In 57 regular season games he scored 29 goals with 32 assists and 8 penalty minutes. The Eagles finished fourth in the Mainland Division and were defeated by Langley in a first-round playoff series. Heinen scored 2 goals with 5 assists and 2 penalty minutes in six playoff games. In March he committed to playing college hockey at the University of Denver in 2013-14. Not among the 210 North American skaters in Central Scoutings final rankings in his second year of draft eligibility, Heinen was selected by Boston in the fourth round (116th overall) in the 2014 NHL Draft.
2014-15: Heinen burst onto the college hockey scene, leading the University of Denver in scoring as a freshman along with undrafted 19-year-old sophomore Trevor Moore. He scored 16 goals with 29 assists and was +19 with 10 penalty minutes. Denver finished fourth in the NCHC, earning an at-large bid to the NCAA Tournament after defeating North Dakota, 5-1 in the NCHC third-place game. The Pioneers topped Boston College, 5-2 before a 4-1 loss to eventual national champion Providence in the East Regional final.
Heinen is a dangerous scorer with great hockey sense and high level of competitiveness. Despite limited skating and technical skills, he is constantly looking to create scoring chances and plays hard in all three zones. He will drive to the net despite any obstacles yet is reliable in his defensive responsibilities.
Heinen is in his sophomore season at the University of Denver in 2015-16, skating with Trevor Moore and Dylan Gambrell on one of the top lines in the country. Heinen's scoring has drawn attention but it is his two-way game that projects him as an effective second or third line forward.