Platform Architect – Mainframe (z/OS)

Platform Architect – Mainframe (z/OS) Join a Global Leader in Enterprise Infrastructure Services Our client is a global technology services provider specialising in mission-critical IT infrastructure for some of the world’s most complex and high-profile organisations. We're currently seeking an experienced Platform Architect with deep expertise in mainframe systems to join their UK architecture team. This is a unique opportunity to work on large-scale infrastructure transformation programmes, helping enterprise clients modernise their legacy environments, improve resilience, and integrate with cloud-native technologies. As a Platform Architect, you'll be responsible for shaping and guiding the architecture of z/OS-based platforms across multiple client engagements. You'll play a senior role in platform strategy, design, and governance, working closely with cross-functional teams to ensure infrastructure is secure, scalable, and aligned to evolving business needs. Key Responsibilities Define end-to-end architecture strategies for enterprise mainframe platforms (z/OS, CICS, DB2, MQ, RACF). Lead platform design and integration with distributed/cloud systems using modern APIs and messaging frameworks. Act as the technical SME for all things mainframe, providing leadership across engineering and delivery teams. Support architectural governance and ensure alignment with compliance, risk, and security standards. Collaborate with both internal teams and external clients to translate business requirements into robust infrastructure solutions. Experience Background in large-scale mainframe environments (z/OS, CICS, DB2, RACF, IMS, MQ). Demonstrated experience in enterprise architecture or platform leadership roles. Proven ability to integrate mainframe platforms with modern cloud/distributed architectures. Deep understanding of mainframe performance, availability, security, and resilience. Excellent stakeholder communication, both technical and non-technical. Interested in leading architecture that powers the platforms the world depends on? Apply now or get in touch with our team for a confidential conversation.