Senior Mainframe z/OS Engineer — Remote

Ensono; Madison (WI); Remote; USD 85,000 - 148,000; Full time

Benefits offered by this job

Unlimited PTO

401k match

Health plan

Fertility coverage

Education reimbursement

Sabbatical

Wellness program

Flexible schedule

Job summary

Ensono is seeking a Senior Mainframe Systems Programmer to maintain and install z/OS in a large enterprise. This role focuses on system software, tape management, security, and JES2 customization, with on-call duties and strong problem-solving.

You will work with TSO/ISPF, SDSF, JCL and SMP/E, contribute to projects, and collaborate across teams. Ensono offers remote-friendly schedules, benefits, and a pay range reflecting experience.

Qualifications

• 10+ years of mainframe experience in a large enterprise.
• Bachelor’s degree or equivalent experience.
• Deep knowledge of z/OS, SMP/E, and ISV installations.
• Strong TSO/ISPF, SDSF, and JCL skills.
• USS knowledge and security administration.
• Team-oriented with strong communication.

Responsibilities

• Participate in on-call schedule.
• Incident, change, and problem resolution related to z/OS.
• Configure and customize z/OS components and parameters.
• Coordinate with vendors and contribute to technical projects.
• Maintain and debug system software, monitor tuning.
• Support z/OS environments with strong analytical skills.

Skills

z/OS

JCL

SDSF

TSO/ISPF

Problem-solving

Teamwork

Education

Bachelor’s degree

Tools

SMP/E

USS (Unix System Services)

Job description

Ensono is seeking a Senior Mainframe Systems Programmer to maintain and install z/OS in a large enterprise. This role focuses on system software, tape management, security, and JES2 customization, with on-call duties and strong problem-solving.

You will work with TSO/ISPF, SDSF, JCL and SMP/E, contribute to projects, and collaborate across teams. Ensono offers remote-friendly schedules, benefits, and a pay range reflecting experience.