Learn the Korean Corporate Titles

to start with, before working at my current company now, i actually had an internship at a company with kind of a global vibe. So we called all our coworkers "매니저" (manager) followed by their name or even their English name if they had one. But now I’m working at a 'real' Korean company where I have to address everyone by their family name or full name along with their title (직급). At first, I was really confused trying to remember all the titles and couldn’t really tell the differences between them. But now, I think I’ve gotten pretty good at it and I'm used to calling everyone by their proper titles haha. Let me break down the Korean corporate titles as below: 회장: Chairman 부회장: Vice Chairman 사장: President or CEO 대표이사: Also President or CEO, but often translated as the head representative 부사장: Vice President 상무: Managing Director 이사: Director 부장: Department/Section Head 차장: Senior Manager or Deputy Head of a Department 과장: Manager 대리: Assistant Manager 사원: Staff There are actually more, but this is what it looks like in my company. One team usually consists of 사원 to 차장, and in my case, the 차장 is usually the team leader (팀장). What about your company, guys?