mainframe operator jobs in Greater London

You will bring deep expertise in mainframe technologiesand enterprise IT systems, combining hands-on technical capability with strategic thinking. Whether you focus on designing architectures, leading transformation projects, or implementing and optimising critical systems, your work will make a real difference.

Join us at Barclays as a Mainframe DB2 System Specialist, where you'll help build and maintain resilient infrastructure platforms supporting vital applications and data systems. Apply cutting-edge engineering and automation to ensure reliability, scalability, and security across our core technologies. Read the overview of this opportunity to understand what skills, including and relevant soft...

Start: 11/24/2025 End: 05/29/2026 Inside IR35 Nottingham Mainframe System Automation Engineer (OPSMVS) required for an initial 12 - 18-month role with our blue-chip Financial Services client. The right candidate must have demonstrable experience in Mainframe Automation & Operations, OPSMVS, REXX and ideally some experience in CA-View & CA-Deliver. The role must be engaged via an FCSA...

Mainframe Migration Delivery Consultant, ProServe Mainframe Center of Excellence Join to apply for the Mainframe Migration Delivery Consultant, ProServe Mainframe Center of Excellence role at Amazon Web Services (AWS)Mainframe Migration Delivery Consultant, ProServe Mainframe Center of Excellence 3 days ago Be among the first 25 applicantsJoin to apply for the Mainframe Migration Delivery...

You will play a key role in supporting and enhancing legacy systems critical to banking operations. The ideal candidate will have strong technical expertise in Assembler and related mainframe technologies, combined with solid experience in high-volume, regulated environments.

Join us at Barclays as a Mainframe DB2 System Specialist, where you'll help build and maintain resilient infrastructure platforms supporting vital applications and data systems. Apply cutting-edge engineering and automation to ensure reliability, scalability, and security across our core technologies. To be successful as a Mainframe DB2 System Specialist, you should have experience with:...

Join us at Barclays as a Mainframe DB2 System Specialist, where you'll help build and maintain resilient infrastructure platforms supporting vital applications and data systems. Apply cutting-edge engineering and automation to ensure reliability, scalability, and security across our core technologies. To be successful as a Mainframe DB2 System Specialist, you should have experience...

You will be required to provide off hours support for the implementation of software changes and support for other projects requiring software expertise and be part of an on-call rota - Set and achieved challenging short, medium and long term goals which exceeded the standards in their field

You will enjoy a comprehensive, locally competitive benefits package.

You will enjoy a comprehensive, locally competitive benefits package.

A leading bank is looking for a senior mainframe engineer, specialised in Cobol to provide support and fix problems for their complex production and technical issues. Required Skills: Hands on Cobol developer experienceIMS DatabasesJCLProduction Support experience *3 days on site based out of their Chester or Bromley offices Job Title: Mainframe Engineer Location: Bromley, UK Job Type:...

Our valued client is looking for a Senior Mainframe Performance and Capacity Management Engineer to oversee real-time monitoring, anomaly detection, and capacity optimization for a large-scale, mission-critical z/OS mainframe environment. The ideal candidate will use advanced tools and deep technical expertise to detect and resolve performance bottlenecks, optimize infrastructure resources, and...

Who We Are At Kyndryl, we design, build, manage and modernize the mission-critical technology systems that the world depends on every day. So why work at Kyndryl? We are always moving forward – always pushing ourselves to go further in our efforts to build a more equitable, inclusive world for our employees, our customers and our communities. The Role Mainframe Engineers at Kyndryl are...

The Amazon Web Services Professional Services (ProServe) team is seeking a skilled Delivery Consultant – Mainframe Migration to join our team at Amazon Web Services (AWS). In this role, you'll work closely with customers to design, implement, and manage AWS solutions that meet their technical requirements and business objectives. You'll be a key player in driving customer success through their...

You will be required to provide off hours support for the implementation of software changes and support for other projects requiring software expertise and be part of an on-call rota - Set and achieved challenging short, medium and long term goals which exceeded the standards in their field

You will enjoy a comprehensive, locally competitive benefits package.

You will bring deep expertise in mainframe technologiesand enterprise IT systems, combining hands-on technical capability with strategic thinking. Whether you focus on designing architectures, leading transformation projects, or implementing and optimising critical systems, your work will make a real difference.

Join us as a Mainframe Performance Specialist, to support the z/OS Performance team in monitoring and improving the performance of Barclays’ mainframe systems. You’ll work across a broad range of Mainframe technologies to support system performance and reliability. This includes investigating infrastructure issues, using performance tools and platform features, contributing in-house code, and...

Join us as a Mainframe Performance Specialist, to support the z/OS Performance team in monitoring and improving the performance of Barclays’ mainframe systems. You’ll work across a broad range of Mainframe technologies to support system performance and reliability. This includes investigating infrastructure issues, using performance tools and platform features, contributing in-house code, and...

You will have the opportunity to be the standard-bearer in a new organization and industry-leading brand, where you can leverage your unstoppable growth potential and start building what can become your legacy.

You will be the trusted advisor, accountable for delivering highly complex, multi-disciplined consulting engagements that provide lasting and measurable value to our esteemed customers.

Join us as a Mainframe Performance Specialist, to support the z/OS Performance team in monitoring and improving the performance of Barclays’ mainframe systems. You’ll work across a broad range of Mainframe technologies to support system performance and reliability. This includes investigating infrastructure issues, using performance tools and platform features, contributing in-house code, and...

Join us at Barclays as a Mainframe DB2 System Specialist, where you'll help build and maintain resilient infrastructure platforms supporting vital applications and data systems. Apply cutting-edge engineering and automation to ensure reliability, scalability, and security across our core technologies. Read the overview of this opportunity to understand what skills, including and relevant soft...