Mainframe System / Network Architect (z/OS)

TechDigital Group; Illinois; Hybrid; USD 120,000 - 180,000; Full time

Job summary

TechDigital Group seeks a seasoned z/OS Mainframe specialist to lead installation, configuration, and upgrades of z/OS environments across development and production systems. You will design sysplex integration and CFRM policies, manage JES3 environments, and ensure high availability and DR readiness.

Responsibilities include performance tuning, capacity planning, security enforcement, and collaboration with application teams to maintain production stability and timely issue resolution.

Qualifications

• Experience with mainframe networking protocols and z/OS system programming.
• Knowledge of Sysplex, CFRM, LPAR, and system integration concepts.
• Hands-on with SMP/E, IOCP, HCD, PARMLIB, and ISV products.
• Familiarity with JCL, batch and online processing environments.

Responsibilities

• Lead installation, configuration, and upgrading of z/OS environments across development and production systems.
• Design and manage z/OS architecture, Sysplex integration, and CFRM policies.
• Handle hardware and software upgrade projects, including datacenter migration and exit planning.
• Perform performance analysis, tuning, capacity planning, and workload management (WLM).
• Monitor system software access, performance, and resource utilization.
• Manage and maintain z/OS, JES3 environments and ISV software.
• Work with application teams to ensure production stability and issue resolution.
• Define and enforce security, access control, and software usage policies.
• Implement backup, recovery, and disaster recovery (DR) procedures.
• Ensure high availability, system reliability, and environment stability.
• Support incident/problem determination and resolution within SLA timelines.
• Provide technical leadership, mentoring, and guidance to teams.

Skills

SNA

VTAM

TCP/IP

OSPF

z/OS System Programming

Sysplex

LPAR

JCL

z/OS CFRM

Tools

SMP/E

IOCP

HCD

PARMLIB

Job description

Mainframe Networking & Infrastructure:

• Manage and support Mainframe Networking Protocols: SNA, VTAM, TCP/IP
• Configure and maintain OSA (Open System Adapter) networking interfaces
• Strong understanding of Enterprise Network Infrastructure and Security
• Knowledge of routing protocols such as Open Shortest Path First (OSPF)
• Manage z/OS network communications, connectivity, and performance optimization

System Programming & Architecture Skills:

• Strong experience in z/OS System Programming and System z architecture
• Expertise in Sysplex configuration, LPAR management, and system integration
• Hands-on with SMP/E, IOCP, HCD, PARMLIB, and system configurations
• Install and maintain z/OS releases, RSU maintenance, and ISV products
• Knowledge of JCL, utilities, batch and online processing environments

Key Responsibilities:

• Lead installation, configuration, and upgrading of z/OS environments across development and production systems
• Design and manage z/OS architecture, Sysplex integration, and CFRM policies
• Handle hardware and software upgrade projects, including datacenter migration and exit planning
• Perform performance analysis, tuning, capacity planning, and workload management (WLM)
• Monitor system software access, performance, and resource utilization
• Manage and maintain z/OS, JES3 environments and ISV software
• Work closely with application teams to ensure production stability and issue resolution
• Define and enforce security, access control, and software usage policies
• Implement and validate backup, recovery, and disaster recovery (DR) procedures
• Ensure high availability, system reliability, and environment stability
• Support incident/problem determination and resolution within SLA timelines
• Provide technical leadership, mentoring, and guidance to teams