Senior z/OS Systems Engineer

Job Description

Job Overview

The z/OS Systems Engineer is responsible for day-to-day production support and engineering of mainframe systems, as well as project-related activities. This role ensures stability, performance, and security of z/OS environments while collaborating with managed service vendors across engineering, operations, and application support. Responsibilities include managing operating systems, hardware, and software; integrating with distributed/cloud platforms; and performing performance tuning, capacity planning, and disaster recovery testing.

Day-to-Day Responsibilities

• Install, configure, and maintain z/OS and related software components.

• Monitor system performance, conduct capacity planning, and optimize for efficiency.

• Implement and manage security measures (RACF/Top Secret).

• Troubleshoot and resolve complex mainframe issues.

• Collaborate with vendors and internal teams for integration and performance analysis.

• Participate in disaster recovery planning and testing.

• Develop automation scripts using REXX, Python, and tools like Ansible.

• Document configurations, procedures, and troubleshooting guidelines.

• Support application developers in optimizing mainframe applications.

• Occasionally work outside normal business hours for critical tasks.

Key Responsibilities

• Maintain and improve mainframe stability and security.

• Lead integration efforts between mainframe and distributed/cloud systems.

• Act as intake for new project work and lead team efforts when required.

Ensure compliance with enterprise standards and best practices.

Compensation: $85-95/hr Exact compensation may vary based on several factors, including skills, experience, and education. Benefit packages for this role will start on the 1st day of employment and include medical, dental, and vision insurance, as well as HSA, FSA, and DCFSA account options, and 401K retirement account access with employer matching. Employees in this role are also entitled to paid sick leave and/or other paid time off as provided by applicable law.

We are a company committed to creating diverse and inclusive environments where people can bring their full, authentic selves to work every day. We are an equal opportunity/affirmative action employer that believes everyone matters. Qualified candidates will receive consideration for employment regardless of their race, color, ethnicity, religion, sex (including pregnancy), sexual orientation, gender identity and expression, marital status, national origin, ancestry, genetic factors, age, disability, protected veteran status, military or uniformed service member status, or any other status or characteristic protected by applicable laws, regulations, and ordinances. If you need assistance and/or a reasonable accommodation due to a disability during the application or recruiting process, please send a request to View email address on click.appcast.io learn more about how we collect, keep, and process your private information, please review Insight Global's Workforce Privacy Policy:

Skills and Requirements

Must-Have Skills & Technologies

• Technical Expertise:

○ z/OS and components (USS, JES2, VTAM).

○ Programming and scripting: REXX, JCL, COBOL.

○ DB2 database management.

○ CICS transaction processing.

○ Mainframe storage (DASD, tape) and SMP/E for software installs.

○ Networking protocols (VTAM).

○ Security tools (RACF).

• Soft Skills:

○ Excellent communication skills (must-have for vendor and team collaboration).

Strong problem-solving and analytical ability.

Education & Experience

• Bachelor’s or Master’s degree in Computer Science or related field.

Minimum 5 years of experience supporting z/OS environments and working with vendor partners for IaaS/SaaS. Nice-to-Have Skills

• Experience with Parallel Sysplex, GDPS, or advanced mainframe technologies.

• Familiarity with DevOps and automation tools.

• Exposure to cloud integration and hybrid environments.

• Leadership experience in cross-functional projects.