Z/OS Mainframe COBOL Application Developer

State of Illinois

$79K — $146K *
Information Technology
Less than 5 years of experience
Job Overview by Ladders

Qualifications

  • Bachelor's degree in Computer Science, Information Systems, or related field.
  • 4 years of hands-on COBOL programming experience on IBM Z/OS.
  • Proficient with MVS JCL, PROCS, VSAM, DB2, and CICS.
  • Experience in web application administration.
  • Familiarity with IBM Watson X for Z and Generative AI tools.

Responsibilities

  • Analyze, design, and develop COBOL applications on Z/OS platform.
  • Perform debugging and root cause analysis for technical issues.
  • Utilize MVS JCL, PROCS, VSAM, and CICS in daily tasks.
  • Implement Generative AI tools to enhance development productivity.
  • Contribute to the Mainframe Wiki Knowledgebase on SharePoint.
  • Collaborate with business analysts and stakeholders for requirements.

Benefits

  • Eligible for State of Illinois Group Insurance plan including health, dental, vision, and life insurance.
  • Accrue 12 paid sick days annually.
  • Minimum of 12 paid vacation days and 4 paid personal days per year.
  • 14 paid state holidays, prorated based on start date.
  • Monday to Friday work hours, 37.5 hours per week.
Full Job Description
Job Requisition ID: 57520 Opening Date: 07/24/2026Closing Date: 08/14/2026Agency: Illinois Office of ComptrollerClass Title: SENIOR PUBLIC SERVICE ADMINISTR - 92220Salary: $79,530.00 - $146,824.70/year (salary commensurate with education and experience)Job Type: SalariedCategory: Full Time County: SangamonNumber of Vacancies: 1Merit Comp Code: IOC

***A RESUME IS REQUIRED FOR THIS JOB POSTING***

All applicants who want to be considered for this position MUST apply electronically through the illinois.jobs2web.com website. State of Illinois employees should click the link near the top left to apply through the SuccessFactors employee career portal.

Applications submitted via email or any paper manner (mail, fax, hand delivery) will not be considered.

Position Overview

COME JOIN A TRANSFORMATIVE TEAM, with a record of proven, positive impact to the State of Illinois.

The Illinois Office of the Comptroller is seeking applicants for the position of Senior Public Service Administrator - Z/OS Mainframe COBOL Application Developer

Major Function

Under administrative direction of the Deputy Chief Information Officer, the Z/OS Mainframe COBOL Developer uses strong technical expertise and excellent problem-solving skills in mainframe development and operations to analyze, design, develop, code, test and debug COBOL applications on the Z/OS platform. The incumbent will bring deep knowledge of COBOL, JCL, VSAM, DB2, and CICS to collaborate with team members, business analysts, and stakeholders to gather requirements and deliver high-quality solutions. In addition to traditional mainframe development, this role will also engage with emerging technologies, including Generative AI and IBM Watson X for Z, to modernize legacy systems and contribute to building a knowledge-driven environment.

Job Responsibilities

  • Analyze, design, develop, code, test, and debug COBOL applications on the IBM Z/OS platform.
    • Perform root cause analysis, system debugging, and implement solutions to complex technical issues.
  • Work with MVS JCL, PROCS, VSAM, IDCAMS, DB2, SQL, and CICS in day-to-day development and maintenance activities.
  • Learn and apply IBM Watson X for Z capabilities for mainframe modernization and optimization. Work with Generative AI tools to enhance development productivity, documentation, and knowledge transfer.
  • Develop effective prompts for Large Language Models (LLMs) to support system analysis, code refactoring, and modernization.
  • Assist in the creation, maintenance, and enhancement of a Mainframe Wiki Knowledgebase within SharePoint to preserve and share institutional knowledge.
  • Performs other duties as required or assigned which are reasonable within the scope of the duties above.


Minimum Requirements

  • Requires knowledge, skill and mental development equivalent to completion of four (4) years of college, preferably with courses in management or design of information systems, Computer Science, Information Systems, or a related field.


  • Requires prior experience equivalent to four (4) years of progressively responsible hands-on experience in a public or business organization including web application administration and thorough knowledge of COBOL programming on IBM Z/OS, MVS JCL and PROCS, VSAM, IDCAMS, DB2 with SQL, CICS online applications, and TSO, ISPF, SDSF.


Preferred Skills

  • Prefers knowledge of Payroll, Accounting & Financial Systems.
  • Prefers exposure to or interest in Generative AI tools in a development environment.
  • Prefers familiarity with LLM prompting techniques to improve code analysis and documentation.
  • Prefers previous experience with IBM Watson X for Z, or the willingness to learn.
  • Prefers knowledge management experience (e.g., contributing to a SharePoint Wiki Knowledgebase).


Knowledge, Skills, and Abilities

  • Requires a thorough knowledge of business administration principles, modern management practices and effective communication techniques.
  • Requires contribution to a collaborative, team-oriented work environment with clear communication and knowledge sharing.
  • Requires knowledge of office programs and service objectives, activities and operational systems.
  • Requires knowledge of office policies and procedures.
  • Requires ability to analyze administrative programs and adopt an effective course of action.
  • Requires ability to develop, install and evaluate new and revised methods, procedures and performance standards.
  • Requires ability to exercise judgement and discretion in developing, implementing, and interpreting departmental policies and procedures.
  • Requires ability to develop and maintain satisfactory working relationships with office officials and outside organization representatives and to deal effectively with controversial problems.
  • Requires ability to exercise sound judgement in analyzing, evaluating, and solving problems of a difficult procedural, organizational, administrative, and technical nature.
  • Requires ability to devise solutions to difficult and technical problems, many of which may be of a precedent-establishing and research nature.
  • Requires ability to judge project alternatives in terms of cost effectiveness.
  • Requires working knowledge of personal computers and software.
  • May require ability to train a professional staff.
  • May require ability to plan, coordinate and review the activities of personnel to meet defined goals and schedules.


* with or without reasonable accommodation.

Benefits

This position is eligible to be a member of the State of Illinois Group Insurance program which includes health, dental, vision, and life insurance coverage options. Additionally, this position will annually accrue 12 paid sick days, a minimum of 12 paid vacation days, 4 paid personal days, and be afforded 14 paid state holidays, prorated based on start date.

Work Hours: Monday - Friday, 37.5 hours/week
Headquarter Location: 325 W Adams St, Springfield, Illinois, 62704
Work County: Sangamon
Agency Contact: Kammy Ferrigno
Phone #: 217-782-6085
Posting Group: Science, Technology, Engineering & Mathematics

APPLICATION INSTRUCTIONS

Use the "Apply" button at the top right or bottom right of this posting to begin the application process.

If you are not already signed in, you will be prompted to do so.

State employees should sign in to the career portal for State of Illinois employees - a link is available at the top left of the Illinois.jobs2web.com homepage in the blue ribbon.

Non-State employees should log in on the using the "View Profile" link in the top right of the Illinois.jobs2web.com homepage in the blue ribbon. If you have never before signed in, you will be prompted to create an account.

If you have questions about how to apply, please see the following resources:

State employees: Log in to the career portal for State employees and review the Internal Candidate Application Job Aid

Non-State employees: on Illinois.jobs2web.com - click "Application Procedures" in the footer of every page of the website.

The main form of communication will be through email. Please check your "junk mail", "spam", or "other" folder for communication(s) regarding any submitted application(s). You may receive emails from the following addresses:

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