Find a job 
Featured Companies 
Featured Universities 
For Companies At a Glance
- Tasks: Manage and optimise z/OS environments while ensuring system performance and high availability.
- Company: Join a leading tech firm in Bracknell with a focus on innovation.
- Benefits: Competitive pay, professional growth, and a chance to work with cutting-edge technology.
- Why this job: Be at the forefront of mainframe technology and make a real difference.
- Qualifications: Experience with z/OS and mainframe hardware is essential.
- Other info: Dynamic role with opportunities for 24/7 support and career advancement.
The predicted salary is between 36000 - 60000 £ per year.
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 oversees 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.
Your Profile
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.
Mainframe Z/Os Administrator in London employer: Stackstudio Digital Ltd.
Contact Detail:
Stackstudio Digital Ltd. Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Mainframe Z/Os Administrator in London
✨Tip Number 1
Network like a pro! Reach out to your connections in the mainframe community, attend meetups, and engage in online forums. You never know who might have the inside scoop on job openings or can refer you directly.
✨Tip Number 2
Show off your skills! Create a portfolio or a personal project that highlights your z/OS expertise. This could be a blog, a GitHub repository, or even a presentation. It’s a great way to demonstrate your knowledge beyond just a CV.
✨Tip Number 3
Prepare for interviews by brushing up on common z/OS scenarios and troubleshooting techniques. Practice explaining your thought process clearly and confidently. We want to see how you tackle real-world problems!
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, we love seeing candidates who take the initiative to connect with us directly.
We think you need these skills to ace Mainframe Z/Os Administrator in London
Some tips for your application 🫡
Tailor Your CV: Make sure your CV is tailored to the Mainframe Z/Os Administrator role. Highlight your experience with z/OS, ISV products, and any relevant hardware knowledge. We want to see how your skills match what we're looking for!
Craft a Compelling Cover Letter: Your cover letter is your chance to shine! Use it to explain why you're passionate about this role and how your background makes you a perfect fit. We love seeing enthusiasm and a personal touch.
Showcase Relevant Experience: When filling out your application, be sure to showcase your hands-on experience with z/OS installations and upgrades. Mention specific tools and technologies you've worked with, as this will help us see your expertise in action.
Apply Through Our Website: Don't forget to apply through our website! It’s the best way for us to receive your application and ensures you’re considered for the role. Plus, it’s super easy to do!
How to prepare for a job interview at Stackstudio Digital Ltd.
✨Know Your z/OS Inside Out
Make sure you brush up on your z/OS knowledge before the interview. Be ready to discuss your hands-on experience with installations, configurations, and upgrades. Highlight specific projects where you've optimised system performance or resolved issues using tools like RMF or SMF.
✨Showcase Your Problem-Solving Skills
Prepare to share examples of how you've tackled complex mainframe incidents in the past. Discuss your approach to diagnosing issues and the steps you took to resolve them. This will demonstrate your ability to provide expert-level support and your familiarity with critical system datasets.
✨Familiarise Yourself with ISV Products
Since you'll be working with various ISV products, make sure you know the ins and outs of those from vendors like Broadcom/CA, BMC, and IBM. Be ready to talk about your experience installing and maintaining these products, and how they integrate with the z/OS environment.
✨Prepare for Technical Questions
Expect technical questions related to hardware configuration, WLM management, and DR planning. Brush up on your knowledge of HMC/SE operations and IOCP/IODF management. Being able to confidently answer these questions will show that you're well-prepared and knowledgeable about the role.
