He gained recognition for his roles in the television series Matrimonial Chaos (2018), Designated Survivor: 60 Days (2019), D.P.

[3] In 2005, during his mandatory military service, he volunteered to join the Zaytun Division, a Republic of Korea Army contingent which carried out peacekeeping and reconstruction missions in war-torn Iraq.

[4][5][6] Son began his acting career, playing a minor role in 2014 film Scarlet Innocence and appeared in Black Stone (2016), Sense8 (2017) and Mother (2018).

His portrayal of Mr. Gu, a reclusive alcoholic stranger, earned praise from critics and audiences and he topped the drama performers popularity ranking for five consecutive weeks.

[10][11][12] The same year, he starred as the villain Kang Hae-sung in the crime action blockbuster The Roundup, which became the highest-grossing film of 2022 in South Korea, selling 12 million tickets.