Mainframe z​/VM & Linux

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.

Location: Phoenix, AZ metro area (Hybrid working model)

Duration: 6 months with option to convert after 6 months

Citizenship Requirements: USC, Permanent Resident, or Other EAD holders only (no visa dependent candidates)

• 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 (Hiper Sockets, 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.

• 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, Hiper Sockets, 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

• Bachelor’s degree in Computer Science, Information Technology, Engineering, or related field preferred
• Equivalent combination of education and experience accepted

Excellent verbal and written English communication skills and the ability to interact professionally with a diverse group are required.

CTG will consider for employment all qualified applicants including those with criminal histories in a manner consistent with the requirements of all applicable local, state, and federal laws.

CTG is an Equal Opportunity Employer. CTG will assure equal opportunity and consideration to all applicants and employees in recruitment, selection, placement, training, benefits, compensation, promotion, transfer, and release of individuals without regard to race, creed, religion, color, national origin, sex, sexual orientation, gender identity and gender expression, age, disability, marital or veteran status, citizenship status, or any other discriminatory factors as required by law.

CTG is fully committed to promoting employment opportunities for members of protected classes.