Senior Systems Engineer, Mainframe API Services

US Bank

Confirmed live yesterday High trust

Closes tomorrow Hybrid

Quick summary

Work type: Hybrid
Location: Saint Paul, MNAtlanta, GACupertino, CANew York, NYChicago, ILGresham, ORCincinnati, OHEnglewood, COCharlotte, NCBrookfield, WIIrving, TXEarth City, MO
Salary: $105,400–$124,000 / yr
Employment: Full-time
Posted: 3 days ago
Freshness: Confirmed live yesterday
Closes: Nov 6, 2026 (soon)
Nearby: 99+ roles within 25 mi

Market check

Salary context

Below market

How this pay compares to similar roles

Similar $167k

This role $115k

$94k $210k

below market most similar roles pay here above market

This role pays less than 90% of similar roles. Most pay $136,386–$198,581 — the blue band above. At the midpoint, this role pays about $115k versus about $167k for comparable roles.

Based on 240 similar postings.

Employer

About US Bank

U.S. Bank (U.S. Bancorp) is the fifth-largest bank in the United States, providing retail banking, corporate and commercial banking, wealth management, and payment services to millions of customers. Industry: Banking & Financial Services

US Bank currently has 40 open roles on FindRole.

Listed pay typically runs $119,765–$140,900 across 24 roles with salary data.

Most-posted roles

View all roles at US Bank

At a glance

TL;DR · Senior Systems Engineer, Mainframe API Services

Role Posting Log in to save

The Sr. Systems Engineer – Mainframe API Services joins the team to support highly available mainframe API platforms and modernization initiatives. This role involves configuring, administering, and supporting IBM z/OS Connect and Liberty within enterprise mainframe environments. The engineer will manage REST APIs integrating with CICS and z/OS applications, while troubleshooting network, TLS, security, and performance issues. Key responsibilities include administering services within Unix System Services, configuring RACF/SAF authentication, and monitoring system health. The position requires hands-on expertise with IBM z/OS, JSON, HTTP/HTTPS, and TCP/IP. Candidates must utilize tools such as Jenkins, Git, Python, Java/Groovy, REXX, and shell scripting to automate deployment and operational processes. The work focuses on maintaining production resiliency, disaster recovery, and high-availability infrastructure for core mainframe services.

What does a Systems Engineer earn in California?

Median $192200 from 97 postings across 22 companies.

See salary data

Skills

IBM z/OS Connect IBM z/OS Liberty REST APIs Unix System Services (USS) CICS Python Java Groovy REXX Shell Scripting Jenkins Git RACF SAF TLS SSL JSON TCP/IP DNS Datadog JCL SDSF z/OS Sysplex DevOps

What you'll do

Configure, administer, and support IBM z/OS Connect and Liberty in enterprise mainframe environments.
Support REST APIs integrating with CICS and z/OS applications and services.
Troubleshoot API, network, TLS, security, performance, and connectivity issues.
Administer z/OS Connect services within Unix System Services (USS).
Configure RACF/SAF, authentication, authorization, TLS certificates, and key rings.
Monitor API availability, performance, system health, and resiliency.
Automate deployment, configuration, monitoring, and operational processes using Jenkins, Git, and various scripting languages.
Support z/OS upgrades, software maintenance, disaster recovery, and 24x7 on-call rotations.

What we're looking for

Bachelor’s degree or equivalent work experience.
At least 5 years of experience within a total information technology (IT) environment.
At least 10 years of experience with the design, development and support of technology.
Extensive experience with IBM z/OS and mainframe infrastructure (preferred).
Hands-on expertise with IBM z/OS Connect, Liberty, and USS (preferred).
Strong knowledge of REST APIs, JSON, HTTP/HTTPS, CICS, TCP/IP, DNS, and TLS/SSL (preferred).
Experience with RACF/SAF, key rings, digital certificates, authentication, and authorization (preferred).
Experience with Jenkins, Git, Python, Groovy/Java, REXX, and shell scripting (preferred).

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