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# Mainframe System Engineer

- **Company:** Cognizant Technology Solutions Corporation
- **Location:** Atlanta, GA, United States (Remote available)
- **Experience:** Expert
- **Salary:** $75,000.0 - $90,000.0
- **Contract:** Permanent contract
- **Skills:** System Configuration, Data Transmissions, IBM DB2, File Systems, IBM Parallel Sysplex, IBM System Z, Mainframes, Performance Tuning, Z/OS, Transport Layer Security, System Availability, Integration Frameworks, ZFS File System
- **Published:** July 3, 2026
- **Apply:** https://dejobs.org/x/x/01042E2DD43F490D8E21BD60C7104456/job/

## About the Role

We are seeking a highly skilled z/OS Administrator / Mainframe System Engineer to manage and support enterprise mainframe environments. The ideal candidate will have deep expertise in IBM z/OS systems, strong experience in system upgrades, security, performance tuning, and hands-on exposure to advanced mainframe components including encryption, networking, and storage subsystems., * 8+ years of experience in IBM z/OS operating systems

 * Hands-on experience with Parallel Sysplex architecture
 * Proficiency in SMPE (System Modification Program Extended)
 * Experience with RMF (Resource Measurement Facility) and SMF (System Management Facility)
 * Strong knowledge of WLM (Workload Manager)
 * Solid understanding of IBM System z architecture
 * Experience with zOSMF configuration and administration
 * Proven experience in z/OS upgrades, patching, and maintenance
 * Expertise in ISV product installation and lifecycle management

Preferred Skills

 * Experience working in large-scale enterprise mainframe environments
 * Strong troubleshooting skills across networking, security, and storage layers in z/OS
 * Familiarity with encryption technologies and secure communications (ICSF, AT-TLS)
 * Experience supporting file systems and data transfer tools (ZFS, Connect:Direct)
 * Exposure to DB2 ecosystem and integration tools (Precisely)

## Description

* Administer and maintain IBM z/OS environments (z/OS 3.1 and above) ensuring high availability and reliability
 * Perform mainframe LPAR builds, system configuration, and environment setup
 * Execute z/OS upgrades, including installation of patches, fixes, and system enhancements
 * Install, configure, and maintain ISV products
 * Manage system parameters including PARMLIB maintenance
 * Monitor and analyze system performance using RMF and SMF, and provide performance reports
 * Configure and administer z/OSMF (z/OS Management Facility)
 * Support and maintain Parallel Sysplex environments
 * Manage and resolve z/OS-related incidents and production issues
 * Optimize workload management using WLM

Additional Responsibilities

 * Conduct data review analysis, provide summaries, and recommend improvements
 * Manage certificate inventory and renewal for applications across the environment
 * Configure and validate AT-TLS (Application Transparent Transport Layer Security)
 * Perform ZFS (z/OS File System) operational tasks
 * Analyze and resolve Connect:Direct issues, including configuration and troubleshooting
 * Collaborate with DB2 teams on Precisely POC (Proof of Concept) tasks
 * Implement and manage ICSF (Integrated Cryptographic Service Facility) encryption


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