What is an on call systems engineer?

On Call Systems Engineers are IT professionals responsible for monitoring, maintaining, and troubleshooting computer systems and networks outside regular business hours. They are typically available during nights, weekends, or holidays to respond to urgent technical issues, system outages, or security incidents. Their main goal is to ensure system reliability and minimize downtime by quickly addressing and resolving problems as they arise. On Call Systems Engineers often work as part of a rotating team and must be skilled in problem-solving, communication, and various technical domains.