Senior Systems Administrator

What success looks like in this role: Administer and support ClearPath OS2200 environments across installation, configuration, daily operations, and lifecycle management. Monitor system health, performance, availability, and capacity to maintain stable, secure, and efficient operations. Lead system upgrades, patching, maintenance, and environment changes using controlled ITIL change management practices. Configure and support core platform services including TCP/IP networking, batch processing, printing, storage, tape, and security controls. Analyze system performance trends, troubleshoot complex technical issues, and implement tuning improvements to optimize throughput and resilience. Support integration with database, middleware, transaction, and application workloads across customer environments. Develop and maintain automation, monitoring, scripts, and operational tooling to improve efficiency and reduce manual effort. Respond to incidents, participate in on-call support, and provide escalation management during critical outages or service disruptions. Create and maintain technical documentation, runbooks, operational procedures, and knowledge transfer materials. Partner with internal teams and customers to deliver reliable managed services, support disaster recovery readiness, and drive continuous service improvement. Support installation of Plateau / Firmware, upgrades and IC's. Able to create or update an SCMS II config. You will be successful in this role if you have: Strong expertise in: ClearPath OS2200 system administration Mainframe OS installation, configuration, and monitoring Experience with: TCP/IP networking and certificates, system configuration Workload automation tools (OpCon, Control-M, AMS) Tape and storage management (STAR, Disk, VTL) RDMS/DMS database environments and integration Batch and transaction processing systems ECL, SSG, IPF, etc. Must be authorized to work and residing in the United States Benefits Unisys offers an outstanding benefits package, featuring unlimited paid time off, a 401(k) match, comprehensive healthcare, HSA matching, ongoing learning opportunities, and more! We're committed to supporting work-life balance and investing in your future success. Video Interview At Unisys, we incorporate video interviews as a key part of our hiring process. This allows us to get to know you better and provide a more engaging and convenient interview experience. We appreciate your understanding and look forward to connecting with you virtually! #LI-MT1 This role may require access to export-controlled commodities and technology. Therefore, to conform to U.S. export control regulations, applicant should be eligible for any required authorizations from the U.S. Government. Unisys is proud to be an equal opportunity employer that considers all qualified applicants without regard to age, caste, citizenship, color, disability, family medical history, family status, ethnicity, gender, gender expression, gender identity, genetic information, marital status, national origin, parental status, pregnancy, race, religion, sex, sexual orientation, transgender status, veteran status or any other category protected by law. This commitment includes our efforts to provide for all those who seek to express interest in employment the opportunity to participate without barriers. If you are a US job seeker unable to review the job opportunities herein, or cannot otherwise complete your expression of interest, without additional assistance and would like to discuss a request for reasonable accommodation, please contact our Global Recruiting organization at or alternatively Toll Free: (Prompt 4). US job seekers can find more information about Unisys' EEO commitment here.