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Mainframe Engineer
Location
United States
Posted
2 days ago
Salary
$10 - $70 / hour
Seniority
Mid Level
Job Description
Mainframe Engineer
TEKsystems
Role Description We are seeking an IBM Mainframe Full Stack Systems Engineer experienced with end to end engineering and modernization of large scale enterprise IBM Z environments. This role requires deep, hands on expertise across multiple z/OS versions, core subsystems, security platforms, storage, networking, virtualization, and performance management in highly regulated, mission critical environments. This role is engineering first, focused on architecture, deep technical analysis, system tuning, and modernization readiness. The engineer will play a critical role in proofing the mainframe platform, ensuring technical compatibility, stability, and performance as the stack evolves. Core Responsibilities - z/OS Platform Modernization & Upgrade Engineering - Engineer for multiple concurrent legacy and current z/OS versions including: - Version interoperability - Incremental upgrade paths - Dependency validation across the stack - Pre upgrade technical assessments - Post upgrade stabilization and tuning - Full Stack Mainframe Engineering (Subsystem Depth) - DB2 for z/OS - Subsystem configuration, performance characteristics, and version interactions - CICS TS - System level behavior, workload tuning, and modernization readiness, TLS enablement impacts - IMS (DB/DC) - Platform interaction, efficient tuning, and coexistence with modern stacks - IBM MQ for z/OS - Queue Manager architecture and configuration, MQ subsystem behavior across z/OS and middleware upgrades, performance tuning, dependency analysis with CICS, DB2 for z/OS, IMS, and distributed platforms - Common enterprise schedulers (e.g., CA-7, Control-M) and other ISV tooling - Compiler and language versions and when recompilations are necessary during upgrades - Common mainframe integrations, including Change Data Capture (CDC) tools, Extract, Transform, and Load (ETL) tools, and DB2 Gateway - Mainframe terminal emulators - Maintain a holistic view of cross subsystem dependencies during upgrades - Storage, Networking & Virtualization Engineering - Mainframe storage behavior, layout, and recovery implications during modernization - Mainframe networking, including SNA, VTAM, and TCP/IP interactions - Design around z/VM and virtualized environments - Identify infrastructure constraints that limit modernization or performance gains - Security Engineering - Review and engineer as needed for RACF and ACF2 security platforms - Partner with risk, audit, and application teams to review and ensure policy alignment and regulatory compliance - Mainframe security best practices, including encrypting data in transit - Leverage SMF, RMF, and operational metrics to analyze system performance - Review and recommend tuning system parameters and subsystem configurations to optimize throughput, response time, and cost efficiency - Help identify trends and risks impacting availability or scalability - Review and recommend operational tasks automation opportunities using REXX, CLIST, JCL, TSO/ISPF - Collaboration & Leadership - Partner with Application teams, Middleware teams, Security & risk organizations, and Vendors (IBM and ISVs) Job Type & Location - This is a Contract position based out of Chicago, IL. Pay and Benefits - The pay range for this position is $10.00 - $70.00/hr. - Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. - Benefits are subject to change and may be subject to specific elections, plan, or program terms. If eligible, the benefits available for this temporary role may include: - Medical, dental & vision - Critical Illness, Accident, and Hospital - 401(k) Retirement Plan – Pre-tax and Roth post-tax contributions available - Life Insurance (Voluntary Life & AD&D for the employee and dependents) - Short and long-term disability - Health Spending Account (HSA) - Transportation benefits - Employee Assistance Program - Time Off/Leave (PTO, Vacation or Sick Leave) Workplace Type - This is a fully remote position. Application Deadline - This position is anticipated to close on Jul 24, 2026.
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