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Infra Mainframe Onsite Tech Lead
Choosing Capgemini means choosing a company where you will be empowered to shape your career in the way you’d like, where you’ll be supported and inspired by a collaborative community of colleagues around the world, and where you’ll be able to reimagine what’s possible. Join us and help the world’s leading organizations unlock the value of technology and build a more sustainable, more inclusive world.
Job Description
Language Requirement: Bilingual (English and Japanese)
About the Role
We are seeking a highly skilled Mainframe / Infra Tech Lead to architect, manage, and optimize enterprise mainframe and infrastructure environments. This is a hands-on technical leadership role, responsible for driving modernization, automation, and high availability across both mainframe and distributed systems.
Key Responsibilities
· Oversee and optimize mainframe infrastructure (IBM z/OS, CICS, DB2, IMS, RACF) and core IT systems (Windows, Linux, VMware, networking, storage).
· Lead technical troubleshooting and root cause analysis for complex incidents.
· Monitor system health and performance using enterprise-grade mainframe tools: Omegamon, CA OPS/MVS, BMC MainView.
· Analyze and forecast resource utilization (CPU, I/O, storage), ensuring SLA compliance.
· Design and maintain automated job scheduling workflows (CA-7, Control-M, IBM Tivoli Workload Scheduler).
· Implement automation and Infrastructure-as-Code (IaC) using Ansible, REXX, JCL, Python, Shell.
· Architect and maintain high availability and disaster recovery solutions (GDPS, Sysplex Concepts, Parallel Sysplex).
· Drive mainframe modernization: DevOps (Git, Jenkins, UrbanCode Deploy), hybrid cloud integration (AWS, Azure, IBM zCloud), and open source on Z (Python, Node.js, Java, OpenShift).
· Leverage AI/ML tools (IBM Watson) for analytics and real-time detection on z/OS.
· Mentor and guide engineering teams, ensuring best practices in performance, capacity, and security.
Most Critical Skills
· Deep expertise in IBM mainframe systems: z/OS, CICS, DB2, IMS, RACF.
· Mainframe monitoring tools: Omegamon, CA OPS/MVS, BMC MainView.
· Infrastructure management: Windows Server, Linux (RHEL, SUSE), VMware vSphere, Hyper-V, networking (TCP/IP, SNA), SAN/NAS storage.
· Automation & scripting: Ansible, REXX, JCL, Python, Shell.
· Job scheduling: CA-7, Control-M, IBM Tivoli Workload Scheduler.
· High availability & DR: GDPS, Sysplex, Parallel Sysplex, failover testing.
· DevOps & Modernization: Git, Jenkins, UrbanCode Deploy, hybrid cloud (AWS, Azure, IBM zCloud), open source (Python, Node.js, Java, OpenShift).
· AI/ML on Z: IBM Watson, machine learning for analytics and fraud detection.
· Security & compliance: RACF/ACF2/Top Secret, SOX, GDPR.
· Leadership: Proven ability to lead technical teams and manage large-scale infrastructure projects.
· Bilingual communication: English and Japanese, with strong technical documentation skills.
Preferred Qualifications
· 8+ years of hands-on experience with IBM mainframe and enterprise infrastructure.
· Experience with ITIL processes, change management, and incident response frameworks.
· Strong analytical, troubleshooting, and mentoring skills.
Capgemini is a global business and technology transformation partner, helping organizations to accelerate their dual transition to a digital and sustainable world, while creating tangible impact for enterprises and society. It is a responsible and diverse group of 340,000 team members in more than 50 countries. With its strong over 55-year heritage, Capgemini is trusted by its clients to unlock the value of technology to address the entire breadth of their business needs. It delivers end-to-end services and solutions leveraging strengths from strategy and design to engineering, all fueled by its market leading capabilities in AI, generative AI, cloud and data, combined with its deep industry expertise and partner ecosystem.
Tokyo, JP
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