He is notable for his roles in the television series SKY Castle (2018–2019), Hot Stove League (2019–2020), and The Uncanny Counter Season 1 & 2 (2020–2023).

In February 2021, Jo Byeong-kyu was accused of being a former bully back in his school days,[3] which led to a suspension of his career and investigations being made on the veracity of these allegations.

In July 2021, police investigations had concluded that the allegations were fabricated and the accuser had apologised to Jo, who was set to recover his career and in talks to star in a new drama serial.

[4] Jo was judged to be a 4th-grade supplementary service (social service agent) in his first physical examination by the Military Manpower Administration.

Jo had been diagnosed with scoliosis, but decided to apply for a re-examination.