He is best known for his performance in the stage play Suck (2008), In the Heights (2015), Chuncheon There (2009, 2015), Waiting for Heroes (2013), Frozen (2015), and The Book of a Thief (2015).

Park has also known for his appearances as a supporting actor in the television series Prison Playbook (2017–2018), My Mister (2018), Lawless Lawyer (2018), and The Penthouse: War in Life (2020–2021).

Park Jung-hwan was born on October 18, 1972, to a father who owned a business called Jimulpo, which provided flooring services.

Park's passion for acting was ignited when he saw a play called Hamlet 4, directed by Ki Guk-seo, during his middle school years.

Despite attending the play alone due to his friends' lack of interest in the title, Park Jeong-hwan was captivated by the actors' performances under the vibrant stage lights.

The experience was distinct from watching performances on television and left a lasting impression on him, solidifying his desire to pursue a career in acting.

While attending Baejae High School in Seoul, he decided to pursue a major in acting and formed a theater club with friends.

This contemporary adaptation of a classic featured the main character singing like a rock singer instead of delivering a traditional speech, under the direction of Michael Marmarinos.

The original work was adapted by Stephen Malatret from Susan Hill's best-selling novel and entered England's West End in 1989.

It was an original work planned by the Ansan Arts Center and contained the will to expand the scope of new forms of production.

[11] In 2014, Park starred in feature film The King of Jokgu, followed by 'The Great Army' (2017), 'The Deokmo: The Age of Rebellion' (2017), and 'Theselfish Man' (2017), and acted in plays and musicals.

In 2017, Park impressed audiences with his supporting role in the drama series Prison Playbook, as Kang Chul-doo (aka "KAIST" of Mullae-dong.