Mainframe Modernization Jobs in California (NOW HIRING)

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CVS Health is seeking a Senior Mainframe Capacity & Performance Engineer to join our Enterprise Infrastructure organization. The Senior Mainframe Capacity & Performance Engineer will serve as a critical technical leader responsible for ensuring the performance, scalability, reliability, and efficiency of our enterprise mainframe environment supporting mission-critical healthcare, pharmacy, and retail applications. As a Senior Mainframe Capacity & Performance Engineer, you will play a key role in capacity planning, workload analysis, performance engineering, and infrastructure optimization across one of the nation's largest and most complex mainframe ecosystems. This position is responsible for proactively monitoring shared mainframe resources, evaluating system utilization trends, identifying performance risks, and providing actionable recommendations to improve overall system health and operational efficiency.

The Senior Mainframe Capacity & Performance Engineer will partner closely with Application Development, Mainframe Systems Programming, Infrastructure Engineering, Architecture, Database Administration, Operations, and Business teams to analyze workload behavior, assess resource consumption, identify top consumers, and optimize application performance. This role requires deep expertise in z/OS performance analysis, capacity forecasting, workload management, and real‑time diagnostic troubleshooting to support critical business services and maintain enterprise service levels. In addition, the Senior Mainframe Capacity & Performance Engineer will lead strategic capacity planning initiatives by evaluating current and future infrastructure requirements, conducting trend analysis, developing growth forecasts, and supporting long‑range planning efforts. The role will be instrumental in driving MIPS reduction initiatives, maximizing platform efficiency, and identifying opportunities to improve infrastructure utilization while controlling operational costs.

The Senior Mainframe Capacity & Performance Engineer will also support performance testing, design reviews, quality assurance activities, infrastructure upgrades, and technology modernization initiatives. This individual will provide expert guidance during major business events, including Open Enrollment, Welcome Season, and other high‑volume processing periods, ensuring the mainframe platform remains resilient, performant, and capable of meeting evolving business demands. Success in this role requires exceptional technical expertise, analytical thinking, problem‑solving capabilities, and strong interpersonal skills. The ideal candidate is a highly collaborative performance engineering professional who thrives in a complex enterprise environment, works effectively across multiple teams and time zones, and can translate technical findings into meaningful business recommendations. This position includes participation in an on‑call rotation and requires the ability to provide real‑time application and system performance support during production incidents, performance degradations, and critical business events.

• Serve as the primary Senior Mainframe Capacity & Performance Engineer responsible for monitoring, analyzing, and optimizing enterprise mainframe resource utilization, performance, and capacity across IBM z/OS environments.
• Conduct capacity planning, forecasting, trend analysis, and real‑time performance diagnostics to identify bottlenecks, mitigate risks, and ensure platform scalability and reliability.
• Partner with application, infrastructure, database, and systems programming teams to identify high‑resource consumers, troubleshoot performance issues, and implement optimization strategies that improve efficiency and reduce MIPS consumption.
• Develop and deliver utilization reports, performance assessments, and capacity recommendations to support infrastructure investments, application initiatives, technology upgrades, and peak‑business readiness activities such as Open Enrollment and Welcome Season.
• Provide technical leadership for performance engineering activities including testing, quality assurance reviews, production support, critical incident response, and participation in an on‑call rotation supporting enterprise application performance.

• 5+ years supporting enterprise IBM mainframe environments, including z/OS and IBM Z architecture.
• 5+ years in capacity planning, performance engineering, root cause analysis, and production troubleshooting within large‑scale environments.
• 3+ years analyzing utilization trends, forecasting capacity needs, and driving workload optimization initiatives.
• 3+ years leveraging enterprise mainframe monitoring and performance management tools to identify and resolve performance bottlenecks.
• 2+ years utilizing Microsoft Office applications, including advanced Excel reporting and data analysis.

• Experience supporting and tuning critical mainframe subsystems, including DB2, CICS, and/or MQ.
• Proficiency with performance and capacity management tools such as OMEGAMON, RMF III, SAS, and MXG.
• Knowledge of capacity forecasting, workload management, and performance optimization methodologies within enterprise environments.
• Strong analytical, communication, and collaboration capabilities, with a demonstrated ability to partner effectively across cross‑functional and geographically distributed teams.
• Familiarity with Healthcare, Pharmacy, Retail, or other highly regulated industries.

Bachelor's degree from accredited university or equivalent work experience (HS diploma + 4 years relevant experience).

Bring your heart to CVS Health Every one of us at CVS Health shares a single, clear purpose: Bringing our heart to every moment of your health. This purpose guides our commitment to deliver enhanced human‑centric health care for a rapidly changing world. Anchored in our brand - with heart at its center - our purpose sends a personal message that how we deliver our services is just as important as what we deliver. Our Heart At Work Behaviors™ support this purpose. We want everyone who works at CVS Health to feel empowered by the role they play in transforming our culture and accelerating our ability to innovate and deliver solutions to make health care more personal, convenient and affordable. We strive to promote and sustain a culture of diversity, inclusion and belonging every day.

CVS Health is an affirmative action employer, and is an equal opportunity employer, as are the physician‑owned businesses for which CVS Health provides management services. We do not discriminate in recruiting, hiring, promotion, or any other personnel action based on race, ethnicity, color, national origin, sex/gender, sexual orientation, gender identity or expression, religion, age, disability, protected veteran status, or any other characteristic protected by applicable federal, state, or local law. We proudly support and encourage people with military experience (active, veterans, reservists and National Guard) as well as military spouses to apply for CVS Health job opportunities.

Qualified applicants with arrest or conviction records will be considered for employment in accordance with all federal, state and local laws.

40

Full time

The typical pay range for this role is:

$40.11 - $106.96

This pay range represents the base hourly rate or base annual full‑time salary for all positions in the job grade within which this position falls. The actual base salary offer will depend on a variety of factors including experience, education, geography and other relevant factors. This position is eligible for a CVS Health bonus, commission or short‑term incentive program in addition to the base pay range listed above.

We take pride in offering a comprehensive and competitive mix of pay and benefits that reflects our commitment to our colleagues and their families.

This full‑time position is eligible for a comprehensive benefits package designed to support the physical, emotional, and financial well‑being of colleagues and their families. The benefits for this position include medical, dental, and vision coverage, paid time off, retirement savings options, wellness programs, and other resources, based on eligibility.

Additional details about available benefits are provided during the application process and on Benefits Moments.

We anticipate the application window for this opening will close on: 10/30/2026