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Mainframe Development Jobs in Illinois (NOW HIRING)

Georgia IT

Mainframe Developer

Chicago, IL · On-site

$50.50 - $65/hr

Atlanta, GA / Vienna, VA / Chicago, IL - First Preference Position Overview We are seeking an experienced Mainframe Developer with 12-15 years of experience in COBOL-based mainframe development and ...

Accenture

Mainframe Specialist

Chicago, IL · On-site

$70K - $196K/yr

Lead the design, development, and modernization of mainframe applications, enforcing best practices and architectural standards. * Evaluate legacy systems and propose actionable modernization ...

Noblesoft Technologies

zOS Technical Developer

Lisle, IL · On-site

$45 - $52/hr

Role - zOS Technical Developer Location -Lisle, Illinois (Onsite, no remote) JD: * 5-8+ years of experience in mainframe development. * Strong proficiency in COBOL, JCL, CICS, VSAM, DB2, IMS, REXX.

Infosys Limited

Senior Mainframe Architect

Chicago, IL · On-site

$125 - $150/hr

Technology|Mainframe Technologies|Mainframe Technologies- ALL Technical Skills 2 Technology ... Provide specialized insights to development team and build collaborative relationships with clients ...

Sonsoft Inc

Mainframe Consultant

Springfield, IL · On-site

Sonsoft Inc. is growing at a steady pace specializing in the fields of Software Development ... Preferred At least 6 years of relevant experience with mainframe- PL/1 language, JCL, and DB2 ...

Sonoma Consulting Inc.

Mainframe EDI Developer

Glenview, IL · On-site

$48.25 - $62.25/hr

... Mainframe COBOL Proficient in DB2 / SQL MVS and JCL TSO / ISPF Good verbal and written ... development life-cycle Good troubleshooting skills Ability to work in team environment as well as ...

Broadcom

Sr Mainframe Technical Consultant

Lisle, IL · On-site

Maintain a deep technical knowledge of the products developed by the mainframe division of Broadcom. * Provide technical specifications and requirements documentation as necessary to support the ...

Atria Group LLC

Mainframe/Cobol developer

Bloomington, IL

$47 - $60.50/hr

Company Description We specialize in Staffing, Consulting, Software Development, and Training along ... Mainframe/Cobol developer * Resource needed with industry knowledge/experience of IBM's Rational ...

Sonsoft Inc

Mainframe PL/1 Consultant

Springfield, IL · On-site

Sonsoft Inc. is growing at a steady pace specializing in the fields of Software Development ... Preferred At least 6 years of relevant experience with mainframe- PL/1 language, JCL, and DB2 ...

CYNET SYSTEMS

DB2 Mainframe Developer

Bloomington, IL · On-site

$45 - $50/hr

Experience with Mainframe technologies including PL/1, IMSDB, DB2, and JCL. * Strong understanding ... Experience in both development and production support environments. * Hands on experience with SAS ...

Sonsoft Inc

Mainframe PL/1 Consultant

Springfield, IL · On-site

Sonsoft Inc. is growing at a steady pace specializing in the fields of Software Development ... Preferred At least 6 years of relevant experience with mainframe- PL/1 language, JCL, and DB2 ...

Infosys

Senior Mainframe Architect

Chicago, IL · On-site

... development team and build collaborative relationships with clients and internal teams, securing ... Required Skill and Experience • Experience working as a Mainframes Architect on large scale ...

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Mainframe Development information

What is the difference between Mainframe Development vs Mainframe Testing?

AspectMainframe DevelopmentMainframe Testing
Primary FocusDesigning, coding, and maintaining mainframe applicationsVerifying and validating mainframe applications for bugs and performance
Required SkillsCOBOL, JCL, DB2, CICSTesting tools, scripting, debugging, knowledge of mainframe environments
Work EnvironmentDevelopment teams, coding in mainframe environmentsQuality assurance teams, testing labs, mainframe systems
CertificationsCOBOL certifications, IBM mainframe certificationsISTQB, mainframe testing certifications

While Mainframe Development involves creating and maintaining mainframe applications, Mainframe Testing focuses on ensuring those applications work correctly and efficiently. Both roles require knowledge of mainframe environments and related skills, but they serve different stages in the software lifecycle.

Is mainframe development a good career?

Mainframe development is a stable career with high demand in industries like finance and government that rely on legacy systems. It requires knowledge of languages such as COBOL and tools like JCL, and often offers competitive salaries and job security due to the specialized skills involved.

Is mainframe development still in demand?

Mainframe development remains in demand in industries such as finance, government, and healthcare that rely on legacy systems for critical operations. Skilled mainframe developers with knowledge of COBOL, JCL, and mainframe environments are sought after to maintain and modernize these systems, ensuring their continued relevance in enterprise IT infrastructure.

What does a mainframe developer do?

A mainframe developer designs, codes, tests, and maintains applications running on mainframe computers, often using languages like COBOL, PL/I, or Assembler. They work in environments that require high reliability and security, and typically collaborate with system administrators and analysts to ensure smooth operation of enterprise systems.

What cities in Illinois are hiring for Mainframe Development jobs?

Cities in Illinois with the most Mainframe Development job openings:

Mainframe Development jobs near you
Infographic showing various Mainframe Development job openings in Illinois as of August 2026, with employment types broken down into 1% As Needed, 66% Full Time, 27% Part Time, and 6% Contract. Highlights an 91% Physical, 3% Hybrid, and 6% Remote job distribution.

Mainframe Developer

Peoria, IL • On-site

Advent Global Solutions, Inc.
IT Services • 201 - 500 employees
Learn more about Advent Global Solutions, Inc.external

$48 - $61.75/hr

Other

Posted 15 days ago

Job description

Mainframe Developer

Location: Peoria, IL Must Relocate
Openings: 2

Required Skills:

  • COBOL Expert
  • JCL Expert
  • DB2 Expert
  • Mainframe Scheduler Expert
  • IMS DB Working knowledge strongly preferred
  • IMS DC Nice to have
  • SAS Good to have

Key Requirement: Strong hands-on Mainframe development experience with COBOL, JCL, DB2, and enterprise scheduling. Candidates must be willing to relocate to Peoria, IL.

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