System Administrator Iii (Karnataka)

Work Schedule OtherEnvironmental Conditions Office As part of the Thermo Fisher Scientific team you ll discover meaningful work that makes a positive impact on a global scale Join our colleagues in bringing our Mission to life every single day to enable our customers to make the world healthier cleaner and safer We provide our global teams with the resources needed to achieve individual career goals while helping to take science a step beyond by developing solutions for some of the world s toughest challenges like protecting the workplace making sure our food is safe or helping find cures for cancer Job Summary The Senior Mainframe Operator provides advanced operational support for mission-critical mainframe environments ensuring high availability performance and reliability of enterprise systems This role acts as a technical escalation point within operations mentors junior operators and collaborates closely with system programmers application teams and infrastructure support groups to maintain stable production processing Key Responsibilities Lead day-to-day operation and monitoring of IBM z OS mainframe systems in a 24x7 production environment Serve as the primary escalation point for complex operational incidents and system abnormalities Monitor and manage batch processing online regions and system resources to meet SLAs Analyze console messages job failures abends and performance alerts take corrective action or escalate appropriately Execute and oversee IPL procedures system restarts and recovery activities following approved runbooks Coordinate closely with system programmers during maintenance windows upgrades and incident resolution Manage and optimize workload scheduling using tools such as CA7 and CSAR Ensure successful execution of backup recovery and disaster recovery processes Maintain and improve operational documentation runbooks and shift handover procedures Mentor and guide junior operators provide on-the-job training and operational best practices Enforce adherence to change management security audit and compliance requirements Participate in problem management root cause analysis and continuous improvement initiatives Required Skills Qualifications Bachelor s degree in Information Technology Computer Science or equivalent professional experience 5 years of hands-on experience in mainframe operations Strong working knowledge of IBM z OS JCL JES2 JES3 TSO ISPF Batch scheduling and automation tools Proven ability to troubleshoot production issues under pressure Strong understanding of operational controls SLAs and incident escalation processes Excellent written and verbal communication skills Preferred Qualifications Experience supporting large-scale high-availability mainframe environments Working knowledge of mainframe storage DASD tape SMS concepts Familiarity with mainframe security tools such as RACF and ACF2 Experience with ITIL-based operations incident problem change management Exposure to automation scripting or workload optimization initiatives Work Environment 24x7 shift-based operations including on-call responsibilities High-impact role supporting business-critical applications Requires strong decision-making skills during incidents and outages .