Jang served as an assistant director on the blockbuster period drama Masquerade (2012) before breaking out with the short12th Assistant Deacon (2014) which won Best Film in The Extreme Nightmare section at the 13th Mise-en-scène Short Film Festival, and Best Director Award (Korean Competition For Shorts) at the 15th Jeonju International Film Festival in 2014. Based on the award-winning short, he made his first feature film The Priests (2015) - a supernatural mystery thriller, which was a hit with more than 5.4 million admissions. Jang said "I got a weird feeling when I saw a priest waiting anxiously for someone on the other side of a fast food restaurant window. The Priests started then."[1][2][3][4]
^Lee, Seung-hoon (May 7, 2024). '무빙'→'서울의 봄' 대상..'파묘'는 4관왕 [제60회 백상예술대상][종합] ['Moving' → 'Seoul Spring' Grand Prize..'Buried Grave' wins 4 awards [60th Baeksang Arts Awards] [Comprehensive]] (in Korean). Star News. Archived from the original on May 7, 2024. Retrieved May 7, 2024 – via Naver.
^Hwang, So-young (April 8, 2024). 60회 맞은 '백상예술대상' TV·영화·연극 후보 공개 [60th 'Baeksang Arts Awards' TV, Film and Theater Candidates Revealed] (in Korean). JTBC News. Archived from the original on April 8, 2024. Retrieved April 23, 2024 – via Naver.