Senior Infrastructure Engineer- Mainframe Performance Analyst at American Express (Phoenix, AZ)

| Phoenix – Mesa – Scottsdale, AZ
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You Lead the Way. We've Got Your Back. At American Express, we know that with the right backing, people and businesses have the power to progress in incredible ways. Whether we're supporting our customers' financial confidence to move ahead, taking commerce to new heights, or encouraging people to explore the world, our colleagues are constantly redefining what's possible - and we're proud to back each other every step of the way. When you join #TeamAmex, you become part of a diverse community of over 60,000 colleagues, all with a common goal to deliver an exceptional customer experience every day.

Millions of customers depend on our infrastructure,

we depend on you.

The success of our entire company rests on our systems, networks, and people. Our Infrastructure engineers know that delivering on that promise takes a robust, scalable and efficient Infrastructure. So if you're an expert on infrastructure and know the value of supporting technology and the people who depend on it, build you career here.

Build a strong infrastructure and a solid career.

The best infrastructure isn't built in a day or even a year and it's certainly not built without a team. Here's just some of what you'll do:

  • Contribute to the analysis of business, application, and technical infrastructure requirements.
  • Design, build, enhance and integrate the infrastructure required to support various platforms and our business portfolio
  • Support initiatives that deliver workable end-to-end infrastructure solutions
  • Participates in test planning and execution


Mainframe & Data Center Infrastructure's mission is to engineer, operate and support highly available and scalable infrastructures at the enterprise level, which includes mainframe and middleware systems, database operations, data centers and security services. It is our commitment to deliver a frictionless enterprise centric environment.

The Sr. Infrastructure Engineer will assist with the engineering and performance measurement of critical American Express mainframe infrastructure in conjunction with troubleshooting, tuning and debugging of infrastructure applications utilizing the mainframe platform. The Sr. Infrastructure Engineer will report to the Director of Mainframe Application Services.

Qualified applicants will be a subject matter expert in defining and evaluating performance data as well as establishing trends and workload forecasts improving infrastructure an application throughput with epmpashis on cost control. They must also be well-versed in writing policies and defining classes for Work Load Management, have a working knowledge of real time monitoring tools, and experience developing and presenting complex data analytics.

  • Researches, designs, builds, optimizes and maintains reliable, efficient and accessible data systems, data pipelines, machine learning pipelines, and/or models. Can support, with guidance, the analytic and/or operational use of data.
  • Build historical trend analysis, help identify anomalies in infrastructure and application performance relative to steady state.
  • Evaluation of options and performance of tradeoff and cost benefit analysis.
  • Plays multiple roles (e.g. individual contributor, lead, teacher, mentor).
  • Designs, builds, tests and manages complex hardware and/or software systems over their life cycles. Sample system domains include but are not limited to: Operating Systems, Transaction Managers (i.e. TPF, CICS, IMS), Middleware, Hardware, Storage, and Virtual Infrastructure.
  • Collaborates with business owners to optimize data collection, storage and usage to maximize the value of information within supported systems.
  • Collaborates with engineering leadership, product teams and other engineering teams, to uncover pain points and opportunities to accelerate delivery.
  • Provides Systems Life Cycle Management; monitors system utilization and performance and conducts system calibration and tuning to ensure system is stable and operating at desired efficiency.
  • Aligns closely with Enterprise partners in data science, architecture, governance, infrastructure, and security to apply standards and optimize production environments and practices.
  • This role would suit a candidate with a strong Data Science background

As part of our diverse tech team, you can architect, code and ship software that makes us an essential part of our customers' digital lives. Here, you can work alongside talented engineers in an open, supportive, inclusive environment where your voice is valued, and you make your own decisions on what tech to use to solve challenging problems. Amex offers a range of opportunities to work with the latest technologies and encourages you to back the broader engineering community through open source. And because we understand the importance of keeping your skills fresh and relevant, we give you dedicated time to invest in your professional development. Find your place in technology on #TeamAmex

  • Must have a Bachelor or Master's degree in a Data Analytics field, Math, Information Technology, Electronic Engineering, Physics, Data Science or related Data Analytics field.
  • Expertise in Data Analytics and tooling, Splunk, Jupyter Notebook, Data Science technologies, SPARK, etc.
  • Comfortable on Linux systems and proficient at programming languages such as Python with math libraries
  • Proficient at building MS Powerpoint presentations, and using excel when needed.
  • 4+years data science and performance engineering experience in a complex environment in the Financial Services industry
  • Experience with mainframe infrastructure performance, specifically zTPF, zOS, and zLinux would be beneficial but not essential
  • Working knowledge of real time monitoring tools Dynatrace, Supervision, Continueous Data Collections, Omegamon, SMF, RMF, Splunk
  • Z-based performance data MQ, DB2, TPFDF, IMS, CICS, storage
  • Demonstrated exemplary personal integrity and ability to build trust and collaborate across an organization
  • A superior ability to motivate and inspire team members to deliver on commitments
  • Excellent verbal and written communication skills with the ability to adapt a message to the appropriate audience
  • Strong strategic thinking and decision making skills

We back our colleagues with the support they need to thrive, professionally and personally. That's why we have Amex Flex, our enterprise working model that provides greater flexibility to colleagues while ensuring we preserve the important aspects of our unique in-person culture. Depending on role and business needs, colleagues will either work onsite, in a hybrid model (combination of in-office and virtual days) or fully virtually.

If the role you are applying for is designated as hybrid or onsite, you will be required to demonstrate that you have completed your primary COVID-19 vaccination series (i.e., 2 doses for Moderna/Pfizer and 1 dose for J&J) in order to work in or visit any of our offices. This requirement is subject to legally required accommodations.

Employment eligibility to work with American Express in the U.S. is required as the company will not pursue visa sponsorship for these positions.

American Express is an equal opportunity employer and makes employment decisions without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, protected veteran status, disability status, age, or any other status protected by law.
More Information on American Express
American Express operates in the Fintech industry. The company is located in New York, NY and New York, NY. American Express was founded in 2022. It has 73317 total employees. It offers perks and benefits such as Flexible Spending Account (FSA), Disability Insurance, Dental Benefits, Vision Benefits, Health Insurance Benefits and Life Insurance. To see all 198 open jobs at American Express, click here.
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