IBM Mainframe Architect

0201 CSC Computer Sciences Ltd; Greater London; Hybrid; GBP 90,000 - 130,000; Full time

Benefits offered by this job

Flexible working arrangements

Pension scheme

Learning & development

Car scheme

Job summary

DXC Technology is seeking an experienced IBM Mainframe Architect to lead architectural direction and modernization of a large mainframe estate in the UK. This role focuses on remediation, secure data movement, and integration with modern platforms while ensuring regulatory compliance.

You will collaborate across infrastructure, application, and data teams, drive architecture decisions, and document migration paths for audit and governance in a global technology environment.

Qualifications

• Extensive experience as an IBM Mainframe Architect or Senior Mainframe Technical Lead.
• Strong knowledge of IBM z/OS, CICS, DB2, RACF, JES3 and Mainframe storage technologies.
• Understanding of COBOL and PL/1 application development within mainframe environments.

Responsibilities

• Lead Legacy Remediation — Identify risks, inefficiencies and modernisation opportunities across mainframe systems.
• Define Architecture & Design — Build robust solutions transitioning from legacy data movement tools to modern, secure, scalable alternatives.
• Modernise Data Integration — Evaluate and replace Attunity-based pipelines with contemporary integration platforms.
• Optimise Performance & Reliability — Ensure high availability and data integrity during and after remediation.
• Strengthen Security & Compliance — Address vulnerabilities in outdated tools; ensure regulatory compliance.
• Collaborate with Stakeholders — Partner with infrastructure, application and data teams to align with business goals.
• Govern & Document — Maintain detailed remediation plans, architectural decisions and migration paths for audit and governance.

Skills

IBM Mainframe

z/OS

CICS

DB2

RACF

JES3

COBOL

PL/1

TOGAF

DevOps

Leadership

AWS

Tools

Attunity (Qlik)

AWS

Job description

Job Description:

Job Title – IBM Mainframe Architect Location – UK (Remote) Type – Full-Time, Permanent

DXC supports one of the largest and most complex technology estates in the London Insurance Market — over 120 interconnected applications spanning distributed, cloud and IBM Mainframe platforms. The Mainframe remains a strategic pillar of this estate, powering critical business services, core processing, data integration and regulatory workloads. We’re looking for an experienced IBM Mainframe Architect to lead the architectural direction, technology refresh and transformation of this ecosystem as part of a multi-year modernisation programme.

What you’ll Do:

• Lead Legacy Remediation — Identify risks, inefficiencies and modernisation opportunities across mainframe systems


• Define Architecture & Design — Build robust solutions transitioning from legacy data movement tools to modern, secure, scalable alternatives


• Modernise Data Integration — Evaluate and replace Attunity-based pipelines with contemporary integration platforms


• Optimise Performance & Reliability — Ensure high availability and data integrity during and after remediation


• Strengthen Security & Compliance — Address vulnerabilities in outdated tools; ensure regulatory compliance


• Collaborate with Stakeholders — Partner with infrastructure, application and data teams to align with business goals


• Govern & Document — Maintain detailed remediation plans, architectural decisions and migration paths for audit and governance

What you’ll bring:

• Extensive experience as an IBM Mainframe Architect or Senior Mainframe Technical Lead


• Strong knowledge of IBM z/OS, CICS, DB2, RACF, JES3 and Mainframe storage technologies


• Understanding of COBOL and PL/1 application development within mainframe environments


• Experience with Attunity (now Qlik) and legacy data integration patterns


• Solid grasp of modern data integration technologies and AWS services integration


• Proven ability to lead complex remediation projects with cross-functional teams


• Familiarity with enterprise architecture frameworks (e.g. TOGAF) and DevOps practices in mainframe contexts

Why DXC?

Work with cutting-edge insurance technology. Be part of a global team driving the transformation of outwards/ceded reinsurance software solutions. Enjoy flexible working arrangements and career development opportunities.

Our Commitment to You

DXC Technology is committed to building diverse teams. We actively encourage applications from women, underrepresented groups, and neurodivergent candidates. We're proud to offer:

• Equal opportunities and inclusive recruitment practices


• Reasonable adjustments throughout the recruitment process


• Supportive networks and mentorship programs


• Flexible working arrangements to support work-life balance

What We Offer You:

• Competitive Compensation & Pension Scheme – Rewarding your expertise while securing your future.


• Comprehensive Benefits Package – Including DXC Select, Perks at Work, and incentive programs for exclusive savings and rewards.


• Continuous Learning & Development – Access to upskilling opportunities, career growth resources, and industry-leading training.


• Lifestyle Perks – Enjoy options like the Salary Sacrifice Car Scheme and more.

At DXC Technology, we believe strong connections and community are key to our success. Our work model prioritizes in-person collaboration while offering flexibility to support wellbeing, productivity, individual work styles, and life circumstances. We’re committed to fostering an inclusive environment where everyone can thrive.

Recruitment fraud is a scheme in which fictitious job opportunities are offered to job seekers typically through online services, such as false websites, or through unsolicited emails claiming to be from the company. These emails may request recipients to provide personal information or to make payments as part of their illegitimate recruiting process. DXC does not make offers of employment via social media networks and DXC never asks for any money or payments from applicants at any point in the recruitment process, nor ask a job seeker to purchase IT or other equipment on our behalf. More information on employment scams is available here.

DXC Technology (NYSE: DXC) is a leading enterprise technology and innovation partner delivering software, services, and solutions to global enterprises and public sector organizations — helping them harness AI to drive outcomes at a time of exponential change with speed. With deep expertise in Managed Infrastructure Services, Application Modernization, and Industry-Specific Software Solutions, DXC modernizes, secures, and operates some of the world's most complex technology estates. Learn more on dxc.com.