**Introduction** At IBM Infrastructure & Technology, we design and operate the systems that keep the world running. From high-resiliency mainframes and hybrid cloud platforms to networking, automation, and site reliability. Our teams ensure the performance, security, and scalability that clients and industries depend on every day. Working in Infrastructure & Technology means tackling complex challenges with curiosity and collaboration. You’ll work with diverse technologies and colleagues worldwide to deliver resilient, future-ready solutions that power innovation. With continuous learning, career growth, and a supportive culture, IBM provides the opportunities to build expertise and shape the infrastructure that drives progress. The IBM Z Software Performance team is responsible for designing, executing, and analyzing stress workloads and benchmarks on IBM Z and LinuxONE systems to ensure these platforms meet stringent customer expectations for reliability, scalability, and performance. The team develops and maintains a suite of tools and automation scripts to support: * Performance environment setup and configuration * Performance measurements and data capture * Data storage in centralized repositories * Presentation and visualization of performance metrics * Analysis and comparison of captured data across multiple scenarios **Your role and responsibilities** As a z/OS Performance Analyst you will be responsible for: * Design and implement benchmarks and stress workloads for z/OS, ensuring they remain relevant and effective. * Configure and set up benchmarks, stress workloads, and the underlying z/OS / IBM Z environment. * Automate performance measurements and streamline data collection processes for benchmarks and stress workloads. * Develop and enhance tools for data collection and performance analysis. * Execute performance benchmarks and stress workloads to validate system efficiency. * Analyze performance metrics and collected data to identify bottlenecks and resolve performance issues. * Collaborate with development teams across the stack (IBM Z Hardware, z/OS Operating System, Middleware, Applications) to guide and support performance optimization efforts. USP : Expertise in IBM Mainframe Operating System (z/OS) performance analysis, managing complex systems that run critical workloads with zero downtime and a fully secured operating environment. **Required technical and professional expertise** Experience: 8-12 years of experience as a Software Developer, Tester, or Performance Analyst. Technical Skills: Strong knowledge of zOS platform and administration, including DB2 administration, COBOL programming, and JCL scripting. Proficiency in programming languages such as C/C++, Golang, Java, and Python. Solid understanding of Operating System fundamentals and Computer Architecture concepts. Basic experience in performance analysis of applications/systems and familiarity with performance tools. Hands-on experience in functional and performance testing of multi-tiered applications. Additional Skills: Exposure to Agile methodologies and ability to apply agile concepts effectively. Strong presentation skills and ability to communicate technical concepts clearly. Collaborative team player with excellent interpersonal and communication skills. **Preferred technical and professional experience** * Strong knowledge of IBM Z Systems physical architecture. * Experience in z/OS functional or performance testing. * Basic understanding of z/OS components and their interactions. * Proficiency in z/OS System Programming and Software Development, including: * USS / 3270 terminal operations * MVS programs * Dataset management * JCL scripting and job execution * TSO, ISPF, JES2, RMF, SMF * z/OS / parmlib configuration * Ability to learn and interpret detailed internal IBM Z performance metrics. IBM is committed to creating a diverse environment and is proud to be an equal-opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, gender, gender identity or expression, sexual orientation, national origin, caste, genetics, pregnancy, disability, neurodivergence, age, veteran status, or other characteristics. IBM is also committed to compliance with all fair employment practices regarding citizenship and immigration status.