Mainframe Systems Admin (remote)

job summary: Here is a summary of the positions job duties:

Administer and support IBM z/OS mainframe environments, including job scheduling configuration, LPAR performance, and IPL processes.

Perform daily system health checks, job monitoring, and performance tuning using tools such as Omegamon, RMF, and SMF.

Apply z/OS maintenance and upgrades using System Modification Program, ensuring changes are validated and documented.

Configure and optimize IBM Workload Manager (WLM) to enforce workload prioritization and meet service goals.

Monitor and support IBM Db2 for z/OS, including subsystem configuration, job tracking, performance tuning, and collaboration with DBAs.

Manage Hitachi mainframe-compatible storage systems, including volume allocation, data set migration, HSM policy enforcement, and storage analysis.

Implement and maintain Data Domain backup technologies and snapshot-based recovery solutions to support DR, archival, and restore processes.

Administer RACF (or equivalent) security settings, conduct access audits, enforce compliance, and support incident investigations.

Support SSL and related security protocols across mainframe subsystems to ensure secure communication and compliance with encryption standards.

Troubleshoot and resolve system and performance issues, including CPU utilization, storage bottlenecks, and misconfigured WLM policies.

Maintain and support middleware integrations with CICS, MQ, IMS, FTP, and distributed systems via TCP/IP, VTAM, and SNA.

Participate in and validate disaster recovery, backup, and restore procedures; maintain operational runbooks and documentation.

Implement and track changes through ITIL-aligned change management processes, ensuring controlled and auditable system modifications.

Support mainframe modernization and re-platforming efforts, providing expertise on system dependencies, data flows, and migration planning.

location: Telecommute job type: Contract salary: $75 - 85 per hour work hours: 9am to 5pm education: No Degree Required

responsibilities: 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.

qualifications: Critical Success Factors

Demonstrated experience administering z/OS environments with integrated monitoring, database, and storage solutions.

Proactive performance tuning and system health oversight using tools like Omegamon and IBM WLM.

Collaboration with cross-functional teams while maintaining confidentiality and compliance standards.

Expected availability window (e.g., 8am-5pm Pacific) with flexibility outside of that for after-hours maintenance and project activities.

Responds to high-severity issues within 1-hour, routine items within same business day.

Ability to maintain high availability of mainframe systems during contract term.

Reliability and accountability in a contract-based role with minimal oversight.

Timely and secure implementation of system changes and updates.

Strong analytical skills and the ability to respond quickly to system incidents.

Strong documentation, knowledge transfer, and communication skills.

Confirm experience with Microsoft Teams and Jira ticketing system.

Regular timesheet approvals and biweekly progress updates.

skills: Data Storage,disaster recovery,Db2,Mainframe,mainframe computing,Omegamon,administration,maintenance

Equal Opportunity Employer: Race, Color, Religion, Sex, Sexual Orientation, Gender Identity, National Origin, Age, Genetic Information, Disability, Protected Veteran Status, or any other legally protected group status.

At Randstad Digital, we welcome people of all abilities and want to ensure that our hiring and interview process meets the needs of all applicants. If you require a reasonable accommodation to make your application or interview experience a great one, please contact HRsupport@randstadusa.com.

Pay offered to a successful candidate will be based on several factors including the candidate’s education, work experience, work location, specific job duties, certifications, etc. In addition, Randstad Digital offers a comprehensive benefits package, including: medical, prescription, dental, vision, AD&D, and life insurance offerings, short-term disability, and a 401K plan (all benefits are based on eligibility).

This posting is open for thirty (30) days.

It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.

Qualified applicants in San Francisco with criminal histories will be considered for employment in accordance with the San Francisco Fair Chance Ordinance.

Qualified applicants with arrest or conviction records will be considered for employment in accordance with the Los Angeles County Fair Chance Ordinance for Employers and the California Fair Chance Act.

We will consider for employment all qualified Applicants, including those with criminal histories, in a manner consistent with the requirements of applicable state and local laws, including the City of Los Angeles’ Fair Chance Initiative for Hiring Ordinance.

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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.

Data Storage,disaster recovery,Db2,Mainframe,mainframe computing,Omegamon,administration,maintenance