[13] Komolong began playing football at age six while living in Brisbane, Australia before moving back to Papua New Guinea.

Following his performances at the 2011 OFC U-17 Championship, he was offered a scholarship from Liston College in Auckland and finished his high school education there.

In 2013, he was invited to participate in the FIFA Blue Stars World Youth Cup by Wynton Rufer, who heard about Komolong through people who had seen him play while in Auckland and was working for the OFC at the time before becoming head coach of the Papua New Guinea national team a year later.

[11] He played one year of college soccer for the Drovers, making 14 appearances while tallying two goals and two assists, with his team finishing the season ranked 11th overall in the NAIA.

NKU head coach John Basalyga rested Komolong after he captained the Papua New Guinea national U23 team in Olympic Qualifiers in 2015[3] and took a temporary break from his studies to represent his country.

[21] In his third season with the Norsemen, Komolong had 13 further appearances while scoring one goal, a game-tying tally against the IUPUI Jaguars during October of his senior year.

[23] While attending Liston College in Auckland, Komolong played for Waitakere City FC of the NRFL, the second division of New Zealand football, in 2012.

One goal came during a 1–6 defeat to Melville United, a team that featured New Zealand internationals Jesse Edge and Tyler Boyd.

[27] In 2014, he left Port Moresby and joined Madang Fox, also of the PNG top division alongside his brother Felix.

While waiting for a new club in Europe,[44] Komolong returned to Papua New Guinea and suited up for University Inter along with his brother Felix.

[2][48] In July 2015, Komolong was named a hero by the press during the 2015 Pacific Games hosted in Papua New Guinea as he scored the stoppage-time winner off a header in a 2–1 victory over Fiji to win the bronze medal.

[49] Komolong also served as tournament ambassador for Port Moresby 2015[50] and took a temporary leave from his university team and studies to represent his country.

[52] He made his senior international debut on 29 May, playing the full 90 minutes of a 1–1 draw with New Caledonia in Papua New Guinea's opening match of the tournament.

[57] In January 2017 it was announced that Komolong was part of Papua New Guinea's initial 23-man squad for two 2018 FIFA World Cup qualification matches against Tahiti in March.

[58] During the first match, the three Komolong brothers (Alwin, Felix, and Kusuga) played together in a senior international fixture for the first time.