> Markdown version of [/jobs/ext/2282190-mainframe-system-administrator](https://www.wearedevelopers.com/jobs/ext/2282190-mainframe-system-administrator). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# Mainframe System Administrator

- **Company:** Intersources Inc.
- **Location:** Cypress, CA, United States (Remote available)
- **Salary:** $26,000.0
- **Contract:** Temporary contract
- **Skills:** JIRA, COBOL (Programming Language), Data Centers, IBM DB2, Disaster Recovery, Issue Tracking Systems, Mainframes, Performance Tuning, Z/OS, Data Storage Technologies, Omegamon, Servicenow
- **Published:** August 28, 2026
- **Apply:** https://www2.jobdiva.com/portal/?a=62jdnw10t7d77ytz0lbaey9qxonk3b05a9tqw96rb7z6hlfo7xj79l9g6mp6aj2o&compid=0/jobs/32926600#/jobs/32926600

## About the Role

Applications: Written in COBOL - familiarity is helpful but not core
Server: Single-server mainframe environment
Ticketing Systems: Jira preferred, but ServiceNow or similar is acceptable, Native z/OS system administration experience
Strong knowledge of IBM Omegamon
Working knowledge of Db2
Solid change management experience (ITIL-aligned preferred)
Experience with mainframe + storage integration
Comfortable running ad hoc queries, optimizing performance, and supporting mainframe-based systems

Soft Skills & Qualities (Critical):
Excellent communication skills - must be proactive and confident
Must have a positive attitude, be independent, and able to "stand on their own two feet"
Should not be quiet/reserved - this is a highly collaborative and visible role
No specific industry experience required

Current & Upcoming Projects:
Mainframe performance optimization
Security and compliance enhancements
Upcoming data center move, Communication
Change Management
Native z/OS
IBM Omegamon
Db2
Ticketing systems (Jira preferred)
Mainframe + storage administration (Hitachi SAM, Data Domain)

## Description

The Mainframe System Administrator is responsible for the administration, maintenance, and optimization of the Client's mainframe computing environment. This role ensures availability, performance, and integrity of mission-critical systems including z/OS, subsystems like Db2, and enterprise-level monitoring and storage platforms.
The administrator supports daily operations as well as project-based activities, such as modernization initiatives or disaster recovery planning. The ideal candidate will demonstrate strong hands-on experience with tools including Omegamon, Db2, IBM Workload Manager (WLM), and Hitachi Data Storage and Data Domain systems.


## Related Videos

- [Data Fabric in Action - How to enhance a Stock Trading App with ML and Data Virtualization](https://www.wearedevelopers.com/videos/253-data-fabric-in-action-how-to-enhance-a-stock-trading-app-with-ml-and-data-virtualization)
- [Improving quality with Agentic AI with Rovo Dev and Xray](https://www.wearedevelopers.com/videos/2005-improving-quality-with-agentic-ai-with-rovo-dev-and-xray)
- [Building with IBM Bob](https://www.wearedevelopers.com/videos/100275-building-with-ibm-bob)
- [Integrate your Cognitive Assistant with 3rd-party DBs and software](https://www.wearedevelopers.com/videos/249-integrate-your-cognitive-assistant-with-3rd-party-dbs-and-software)
- [Collaboration Quantified: Lessons from Open Source Developer Networks](https://www.wearedevelopers.com/videos/1422-collaboration-quantified-lessons-from-open-source-developer-networks)
- [".Net is too slow" was not an option](https://www.wearedevelopers.com/videos/100176-net-is-too-slow-was-not-an-option)

## Related Articles

- [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again)
- [93 Java Interview Questions You Should Prepare For](https://www.wearedevelopers.com/magazine/14-93-java-interview-questions-you-should-prepare-for)
- [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated)
- [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers)
- [Top Big Data Technologies That You Need to Know](https://www.wearedevelopers.com/magazine/108-top-big-data-technologies-that-you-need-to-know)
- [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers)