Mainframe z/VM & Linux

Computer Task Group, Inc•Phoenix, AZ

1d•Hybrid

About The Position

CTG is seeking to fill a Mainframe z/VM & Linux Systems Programmer position for our client. Responsible for administering, supporting, and optimizing IBM z/VM hypervisor environments and Linux on IBM Z (z/Linux) systems. This role focuses on virtualization management, Linux workload hosting, performance tuning, storage/network integration, and maintaining highly available enterprise workloads on IBM Z infrastructure.

Requirements

IBM z/VM administration and virtualization expertise
Linux on IBM Z (z/Linux) system administration
Enterprise Linux experience (RHEL, SUSE, Ubuntu on Z)
Strong understanding of DASD, SAN, FCP, HiperSockets, OSA, TCP/IP
Performance tuning and capacity planning experience
Scripting/automation: Bash, Python, REXX, or shell scripting
Backup, DR, and high availability concepts
Security integration experience (RACF preferred)
Strong troubleshooting and analytical skills
5+ years of experience with IBM z/VM and Linux on IBM Z environments
Experience in enterprise-scale Linux systems administration
Experience supporting production mainframe infrastructure
Excellent verbal and written English communication skills and the ability to interact professionally with a diverse group are required.

Responsibilities

Administer and maintain IBM z/VM hypervisor environments.
Provision, configure, and support Linux on IBM Z (z/Linux) guest systems.
Manage virtual machines, system resources (CPU, memory, I/O), and workload allocation.
Perform performance monitoring, tuning, and capacity planning across z/VM and Linux workloads.
Troubleshoot issues across z/VM, Linux (RHEL, SUSE, Ubuntu on Z), storage (DASD, SAN, FCP), and networking (HiperSockets, OSA, TCP/IP).
Implement system patching, upgrades, and lifecycle management.
Support backup, recovery, high availability, and disaster recovery processes.
Configure virtual networking, storage pools, and guest provisioning.
Develop and maintain automation scripts using Bash, Python, REXX, or shell scripting.
Collaborate with storage, network, security, and z/OS teams.
Support security and compliance controls, including RACF integration.
Participate in on-call rotation and production support escalation.
Maintain technical documentation, standards, and operational runbooks.