Senior Mainframe Systems Programmer – z/OS

Ensono

. Provide support for ongoing projects requiring installation, testing, and implementation of new z/OS operating systems and other system software .

Posted 10/8/2026full-timeRemote • United StatesSenior💰 $85,000 - $148,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

Expertise in z/OS installation, maintenance, and systems programming, with strong capabilities in problem resolution and incident management. Proven ability to collaborate effectively in a team environment while maintaining high standards of customer service and communication.

Highest-signal resume keywords

Z/OS Installation and MaintenanceMainframe System ProgrammingSMP/E KnowledgeTSO/ISPF and JCL ProficiencyUnix System Services (USS) Management

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Z/OSSMP/ETSO/ISPFSDSFJCLUnix System Services (USS)Z/OS SecurityParallel SysplexCatalog ManagementISV Installations

Soft Skills

Interpersonal SkillsVerbal CommunicationWritten CommunicationTeam CollaborationProblem-Solving

Certifications & Qualifications

Bachelor’s Degree

Industry Keywords

Mainframe EnvironmentLarge EnterpriseSystems SoftwareIncident ManagementChange Management

Tech Stack

Tools & technologies

Unix

About the role

Key responsibilities & impact

Provide support for ongoing projects requiring installation, testing, and implementation of new z/OS operating systems and other system software
Maintain and debug systems software
Monitor and tune systems software
Participate in the on-call schedule
Resolve incidents and problems
Handle incidents, changes, and problems
Configure and customize z/OS and related tools
Set up parameters
Communicate with vendors
Participate and contribute to technical projects
Support problem resolution and implement changes in z/OS environments

Requirements

What you’ll need

Minimum of 10+ years of experience within a mainframe environment within a large enterprise or equivalent combination of education and experience
Bachelor’s degree required and/or equivalent work experience
Knowledge and understanding of z/OS and z/OS installation and maintenance including SMP/E
Working knowledge of TSO/ISPF, SDSF, JCL
Working knowledge of Unix System Services (USS)
Working knowledge of USS file system management and security
Ability to perform the skill set of a Mainframe System Programmer
Ability to perform moderately complex ISV installations
Knowledge of z/OS security
Knowledge of z/OS systems programming functions
Understanding of z/OS services structure, Parallel Sysplex, and Catalog management
Ability to work well as a team member
Stress resistance in major incident and emergency situations
Good interpersonal, verbal, and written communication skills
Customer service skills at management level
Good collaboration and teamwork skills
Self-motivated
Strong analytical skills and problem-solving capabilities
Good planning and organizational skills
Initiative and good learning abilities

Benefits

Comp & perks

Unlimited Paid Days Off
Three health plan options
401k with company match
Eligibility for dental, vision, short and long-term disability, life and AD&D coverage, and flexible spending accounts
Family Forming Benefit including fertility coverage and adoption/surrogacy reimbursement
Paid childbearing and paternal leave
Education Reimbursement, Student Loan Assistance or 529 College Funding
Sabbatical leave
Wellness program
Flexible work schedule
Annual bonus plan based on company and individual performance, depending on eligibility
Equity grant under the Associate Equity Appreciation Program, depending on eligibility
Option to work from home or in Ensono offices when not required at a client site