A Company Man (2012)
The film stars So Ji-sub as Hyung-do. Hyung-do is white collar worker employed at the corporate office of a metal works company. He's a loyal mid-management type who's married to his job, and, he goes about his daily 9-5 routine as so many other people do in this world. He also happens to be a professional assassin, as is, apparently, everyone else at the entire office he works at. This a legit company with typical business concerns, but they also kill people. There are several dozen people or so that work for this company, and everybody working here is well aware of the company's dual purpose. From the chairman on down to the receptionist at the front desk, everybody has their part to play in making sure the company is a success on both fronts.