Engineers generally don't take over the manager's responsibilities unless they're technical or reporting responsibilites. Generally it's another manager. Most c

Engineers generally don't take over the manager's responsibilities unless they're technical or reporting responsibilites. Generally it's another manager. Most companies require management involvement in P0 incident response for an example. At most companies I've worked at an engineer generally wouldn't be an acceptable substitute. A peer or the manager's boss usually takes it in their absence. It's not unusual that a significant portion of management responsibilities aren't visible to their individual contributor direct reports.