Markanich attended Bradley-Bourbonnais Community High School, where he scored 40 goals and had 14 assists as a senior in 2017, helping the Boilermakers to a third-place finish in the Illinois 3A State Tournament while earning all-state honors.
He later played with Olympiacos Chicago, who won the US Club Soccer 2018 U19 Super Group National Championship.
In four seasons with the Huskies, Markanich made 67 appearances, scoring 17 goals and tallying 24 assists.
[3] While at college, Markanich played with USL League Two side Green Bay Voyageurs between 2019 and 2021, without the 2020 season been cancelled due to the COVID-19 pandemic.
[10] In March 2024, Markanich was reportedly one of the players being recruited by head coach Tom Saintfiet and team manager Freddy Gonzalez to play for the Philippines.