• Work within an IBM and Unisys mainframe OS and environment to support customer processing, applications, and configurations. • Conduct tape service support for external tape systems in the z/OS Mainframe environment, including tape movement from silo to silo and preparing/updating tape administration documentation. • Provide status and activity reports on items of team activities. • Attend and participate in meetings. • Evaluate the customer’s mainframe processing requirements (e.g. scheduling requests, capacity concerns, and performance requirements) and comprehend/effectively communicate these requirements to customers and government employees (both orally and in writing). • Troubleshoot problems to minimize interruptions in the customer's critical business activities. • The contractor shall proactively identify and resolve system performance bottlenecks. • Notify the customer of the following: acceptance, receipt of upgrades, and interruptions in service for upgrades/system patches. • Provide follow-up during incident management including ITSM ticket updates, system documentation, and what steps were taken to fix the issue, especially concerning items that are reportable. • Contacting the customer via phone/email may be required during incident management. • Contact customer for required system reporting such as: unannounced outages, service interruptions, and system restoral. These must fall within customer requirements/standards/service level agreement (SLA). • Provide the latest updates to any ongoing issues, possible workarounds, and incident resolutions to DISA Ecosystem, C2 cell, to the customer. • Receive and disseminate appropriate notifications for ASI, product upgrades, software updates, and COOP exercises. This is done to inform both internal and external customers of potential changes in operational service. • Support customer performance requirements and customer support policies/procedures in order to ensure that the customer’s SLA objectives are being achieved.