He is a member and vocalist of the South Korea-based Filipino boy band Hori7on under ABS-CBN and MLD Entertainment, as a winning contestant of the reality survival show Dream Maker (2022–23).

He was cast in the role of Tristan, the son of Manu and Monique, who are portrayed by Paolo Ballesteros and Solenn Heussaff, respectively.

[6] In 2022, Marcus participated in Dream Maker, a reality competition show broadcast on Kapamilya Channel and A2Z which determined the lineup of an upcoming boy band from a field of 62 contestants, to be jointly managed by ABS-CBN and MLD Entertainment.

[7] His performance on the pilot episode was praised; mentor Bae Yoon-jung commented: "At your age, I didn't expect that you are that good".

[8] Throughout the show, Marcus consistently performed well, staying within the top 7 after each round, allowing him to advance to the finals, where he placed second and made the lineup of Hori7on.