Mainframe Z/Os Administrator
hace 26 días
Bracknell
Our client, an award-winning Car Hire Rental company is looking for a Mainframe Z/Os Administrator This role is responsible for implementing, maintaining and optimizing z/OS Operating environment and involves managing system configuration, upgrades, applying maintenance (PTFs/RSUs), monitoring system performance and ensuring high availability. The engineer will oversee hardware components such as CPCs, LPARs, DASD, tape systems, HMC/SE, and IOCP/IODF configurations. Your responsibilities: • Plan, prepare, and execute z/OS operating system upgrades, • Apply IBM PTFs and APARs to maintain system integrity and resolve reported issues, • Monitor z/OS system health, performance, and resource utilization using tools like RMF, SMF, TMON and SAS, • Install, configure, upgrade, and maintain a wide range of ISV products (e.g., Broadcom/CA, BMC, IBM, Rocket Software, etc.), • Have good understanding and experience on Hardware Configuration Definitions / IOCP and HMC Management and WLM management., • Collaborate with vendors for problem resolution, licensing, and technical support., • Ensure compatibility and integration of ISV products with the z/OS environment., • Manage and maintain critical system datasets (e.g., SYSRES, Page datasets, SMF datasets)., • Provide expert-level support for mainframe incidents, including problem determination, diagnosis, and resolution in a timely manner., • Analyze system performance data to identify bottlenecks and recommend improvements., • Tune various z/OS components, WLM (Workload Manager), and ISV products to optimize resource utilization and application performance., • Support DR planning, setup, IPL testing, replication technologies (e.g., GDPS), and DR event execution., • Analyze system logs, sysout, dumps, and diagnostic data for complex issues, • Participate in on-call rotation for 24/7 support of critical systems. Essential skills/knowledge/experience: • In-depth knowledge and hands-on experience with z/OS operating system installation, configuration, and maintenance., • Proven experience with major z/OS upgrades, • Extensive experience with the installation and support of various ISV products from vendors such as Broadcom/CA, BMC, IBM, and Rocket Software, • Hands‑on experience with IBM Z mainframe hardware including CPCs, LPAR configuration, HMC/SE operation, IOCDS/IODF management, FICON channels, OSA, Coupling Facility structures, and hardware upgrades or migration Desirable skills/knowledge/experience: • Understanding of automation tools such as OPS/MVS, System Automation, Automation Point, and integration of alerts/monitoring across enterprise operations, • Familiarity with ZEKE Scheduler to support operations teams and diagnose JES/workload issues., • Exposure to large enterprises or regulated environments