IBM Mainframe Infrastructure Specialist
IBM Mainframe Infrastructure Specialist
Job type:
Haken
Specialization:
Infrastructure
Language Level:
English Level - High Intermediate (TOEIC 730),Japanese Level - High Intermediate (JLPT Level 2)
Location:
Sumida-Ku
Salary:
0.00
Job Reference:
501352
A world’s leading Insurance service provider is looking for an IBM Mainframe Infrastructure Specialist. The ideal candidate is a senior IBM Mainframe Infrastructure Specialist with extensive experience supporting enterprise IBM z/OS environments. They should possess strong troubleshooting skills, infrastructure expertise, and the ability to lead technical discussions across multiple vendors and internal teams. The role consists of approximately 70–80% technical infrastructure support and troubleshooting and 20–30% project management and technical coordination.
Responsibilities:
- Provide technical support for IBM Mainframe infrastructurerelated issues raised by application development teams
- Act as the primary technical bridge between application development vendors and infrastructure vendors to resolve complex infrastructure and platform issues
- Support IBM Mainframe infrastructure setup, configuration, maintenance, and operational activities
- Troubleshoot production issues involving IBM z/OS and associated middleware technologies
- Analyze infrastructure problems and perform root cause analysis to improve platform stability
- Design and support hybrid architectures integrating IBM Mainframe environments with Open Systems platforms
- Support enterprise API integration initiatives utilizing z/OS Connect and related IBM technologies
- Review infrastructure designs and provide technical recommendations for modernization initiatives
- Coordinate technical activities across infrastructure, application development, middleware, networking, and security teams
- Provide technical leadership during enterprise transformation and migration projects
- Support infrastructure planning, implementation, testing, and production deployments
- Track project risks, issues, technical dependencies, and milestones while working with multiple internal and external stakeholders
- Produce technical documentation, architecture diagrams, implementation plans, and operational procedures
- Collaborate with project managers, architects, and engineering teams to ensure successful project delivery
- Contribute to continuous improvement initiatives for IBM Mainframe infrastructure services
Required Skills:
- Bachelor's degree in Computer Science or a related field, with 8+ years of experience delivering enterprise IT solutions
- Strong expertise in IBM Mainframe technologies, including IBM z/OS, z/OS Connect, CICS, IBM MQ, IMS DB, and the broader z/OS ecosystem
- Extensive experience in IBM Mainframe infrastructure administration, including system setup, configuration, production support, troubleshooting, and performance analysis
- Proven ability to design hybrid architectures integrating IBM Mainframe and Open Systems, with expertise in API architecture, REST API integration, and z/OS Connect implementation
- Hands-on experience with enterprise integration technologies, infrastructure migration, incident management, and problem management to ensure high availability and operational stability
- Demonstrated technical leadership in large-scale enterprise infrastructure transformation and migration projects, including vendor management and cross-functional stakeholder coordination
- Strong project management and architecture review capabilities, ensuring infrastructure solutions align with business objectives, enterprise standards, and operational best practices
Why you should apply:
- Work with international engineering teams
- Drive AI innovation and digital transformation
- Gain exposure to modern technologies
- Opportunity to make a significant technical impact within a global organization
Company overview:
As one of the world's leading insurance organizations, this company operates across numerous countries and regions, serving millions of individual and corporate customers worldwide. With a strong global presence and a long-established reputation in the financial services industry, the company continues to invest heavily in digital transformation, process modernization, and technology-driven innovation. Employees have the opportunity to work in an international environment, collaborate with stakeholders across multiple regions, and contribute to large-scale enterprise initiatives that directly impact business operations and customer experience.
Working Style: Hybrid (4 days in office, 1 day remote)
Working Hours: Monday–Friday, 9:00–17:00
Holiday: Weekends, Japanese national holidays, Year-end/New Year holidays, Paid annual leave, Special leave
Benefits: Social insurance, Transportation allowance, Overtime pay, Defined contribution pension plan, Professional development support, Training programs, Skill development reimbursement programs, Employee assistance programs, Global working environment with international stakeholders
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