Debuting as a member of the group 2AM in July 2008,[1] he began his acting career in 2012 with the KBS series Dream High 2, playing Jin Yoo-jin.

He, along with Shinee's Onew and Girls' Generation's Seohyun, had the highest national score for their high school SATs exam.

Jinwoon is known to be close to 91-liners, such as Nicole Jung of Kara,[3] Son Dong-woon of Beast,[4] Mir of MBLAQ, Key of Shinee, and Seohyun of Girls' Generation.

To help establish his 'rocker roots', he received mentorship from veteran rock band YB, vocalist Yoon Do Hyun, and bassist Park Tae Hee.

Big Hit Entertainment revealed on November 15, "Jinwoon successfully completed a joint production with Yoon Do Hyun's Band, who he's admired for a long time.

"[12] On February 29, 2012 he released his OST song "We Are The B" for KBS's Dream High 2 together with Kang So-ra, Jinyoung and Kim Ji Soo.

He played Choi Seung-chan, a former rookie rising baseball star, in the South Korean television series called Madame Antoine: The Love Therapist, which was released in January 2016.