He is also professor at the Department of Theater and Film at Digital Seoul Culture Arts University.

In 2011, he turned to the small screen, co-wrote and directed Sign, a medical crime investigation drama starring Park Shin-yang and Kim Ah-joong.

After completing his studies, Jang managed to secure a job as the youngest writer at a broadcasting station.

In a surprising twist, a script that Jang had previously written was adopted, leading to a promotion to the role of Field Director.

[5] On March 4, 2022, Jang donated 30 million won to the Children's Fund in Ukraine, along with his wife Kim Eun-hee, to help Ukrainian victims in Russian invasion.