Alen started competing in ITU events in 2013 where he has gone onto have a number of successful races. As of 2017, Alen has had five podiums, three wins and ranks 9th in the world.

Recent Highlights

- 4th place at the 2017 Yokohama ITU World Paratriathlon Series;
- 6th place at the 2017 Kitzbühel ETU Triathlon European Championships;
- 7th place at the 2017 ITU World Triathlon Grand Final Rotterdam;
- 8th place at the 2017 Iseo - Franciacorta ITU Paratriathlon World Cup; and
- 4th place at the 2016 Rotterdam ITU Paratriathlon World Championships.