1.
section chief; subsection head
a junior management position in Japanese companies, between supervisor and manager
Usage
係長 is typically the first official management position in traditional Japanese companies. The title comes from 係 (charge, duty) + 長 (chief, head).
Cultural note
A common ladder in Japanese companies (titles and order vary by company):
平社員 → 主任 → 係長 → 課長 → 部長
(Regular employee → Supervisor → Section chief → Manager → Department head)