A SAP Basis Manager typically oversees the overall health and performance of SAP environments, manages system installations, upgrades, backups, and ensures system security and compliance. They lead teams of SAP Basis administrators, coordinate with business units to assess and implement technical requirements, and act as the primary point of contact for escalated system issues. Regular tasks include system monitoring, troubleshooting, and performance tuning, as well as planning for disaster recovery and system landscape changes. Collaboration with IT, application, and business teams is essential, making this a dynamic and highly interactive role.