Lead zOS Mainframe Systems Engineer
Reston, VA
Experience: 0
Category: Information Technology
Contractor Work Model: Hybrid
Brand: System One
Job ID: 383277
Date Posted: 11/13/2026
Shortcut: http://jobs.systemone.com/b0uw1g
Lead z/OS Mainframe Systems Engineer
Location: Remote (Candidates must reside in DC, MD, VA, WV, PA, DE, NJ, or NC)
Rate: $87.12/hour W-2
Interview Process: Second-round onsite interview required in Reston, VA or Washington, DC
About the Role
We are seeking an experienced Lead z/OS Mainframe Systems Engineer to support the maintenance, modernization, security, and optimization of a large-scale IBM z/OS environment. This role is heavily focused on mainframe security, encryption, RACF administration, CyberArk integration, and platform resiliency while providing technical leadership across infrastructure initiatives.
Key Responsibilities
- Lead the design, implementation, and support of IBM z/OS mainframe infrastructure.
- Manage and enhance mainframe security, including RACF, CyberArk integration, and vulnerability remediation.
- Support data encryption initiatives for data at rest and data in transit.
- Optimize and maintain SYSPLEX environments, system resiliency, and platform availability.
- Troubleshoot complex system issues, perform root cause analysis, and support incident resolution.
- Collaborate with managed service providers and internal teams to improve operational performance and scalability.
- Provide technical guidance and leadership to cross-functional teams.
Required Qualifications
- 8+ years of experience supporting IBM z/OS environments in a SYSPLEX infrastructure.
- Strong experience with:
- RACF Security Administration
- z/OS Systems Programming
- CICS TS Systems Programming
- IBM MQ Systems Programming
- DB2 administration/support
- IBM System Automation
- Control-M Batch Scheduling
- ISV product installation and implementation
- 5+ years of cybersecurity experience, including mainframe security and ransomware mitigation.
- Experience with CyberArk integration, encryption technologies, and security compliance initiatives.
- Strong leadership, communication, and project coordination skills.
Preferred Qualifications
- Advanced SYSPLEX and ICF configuration/tuning experience.
- Experience with Sysplex decoupling projects.
- Knowledge of TCP/IP networking on mainframe platforms.
- Experience with IBM z16 hardware and Dell EMC storage environments.
- Familiarity with pervasive encryption, key management, and ransomware protection solutions for mainframes.
- Experience with Vanguard Compliance Manager.
If you are a senior mainframe engineer with deep expertise in z/OS security, infrastructure modernization, and enterprise-scale systems support, we encourage you to apply.
Ref: #851-Rockville-S1
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