noun
assistant section manager; assistant department manager
A corporate title for a deputy or assistant manager of a section or department. The exact rank varies by company, but it is typically one step below 部長 (department manager).
彼は今年、出席部長に昇進した。
He was promoted to assistant department manager this year.
出席部長として、会議の準備を担当しています。
As assistant section manager, I am in charge of preparing for meetings.
Compound of 出席 (attendance, presence) and 部長 (department manager). The exact origin of the title is uncertain, but it likely refers to a manager who attends meetings or represents the department in the absence of the 部長.