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Mainframe Jobs in Wisconsin (NOW HIRING)

Apexon

Mainframe Developer

Fitchburg, WI · On-site

$51.75 - $66.50/hr

Develop, enhance, maintain, and support mainframe applications using COBOL and Db2. * Perform production support activities, including troubleshooting, root cause analysis, and issue resolution.

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Deloitte

Mainframe Developer

Milwaukee, WI · Hybrid

$48.25 - $62/hr

As an experienced Mainframe Developer ,you will have the ability to share new ideas and collaborate on projects as a consultant without the extensive demands of travel. The Project Delivery Talent ...

Sonsoft Inc

Mainframe Consultant

Franklin, WI

Preferred At least 6 years of relevant experience with mainframe- PL/1 language, JCL, and DB2 database At least 6 years of experience in software development life cycle. At leave 4 years of ...

Sonsoft Inc

Mainframe Automation Testing

Milwaukee, WI · On-site

Jenkins * 2 yrs of SDET knowledge in PL1 (Mainframe) * 2 yrs of Insurance knowledge * Framework Design and Enhancement * Experience with Insurance domain * Ability to work in team environment and ...

Sonsoft Inc

Mainframe Architect

Milwaukee, WI

Company Description Sonsoft , Inc. is a USA based corporation duly organized under the laws of the Commonwealth of Georgia. Sonsoft Inc. is growing at a steady pace specializing in the fields of ...

Sonsoft Inc

Mainframe Architect

Milwaukee, WI

Company Description SonSoft is an IT Staffing and consulting firm and duly organized under the laws of the Commonwealth of Georgia. We are growing at a steady pace specializing in the fields of ...

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$10

$53

$73

How much do mainframe jobs pay per hour?

As of Jun 11, 2026, the average hourly pay for mainframe in Wisconsin is $53.88, according to ZipRecruiter salary data. Most workers in this role earn between $47.55 and $61.15 per hour, depending on experience, location, and employer.

What are the key skills and qualifications needed to thrive as a Mainframe Developer, and why are they important?

To excel as a Mainframe Developer, a strong background in COBOL, JCL, mainframe operating systems (like z/OS), and database management is essential, often supported by a degree in computer science or a related field. Familiarity with tools such as IBM DB2, CICS, VSAM, and mainframe version control systems is typically required, and certifications like IBM Certified System Programmer can be advantageous. Analytical thinking, problem-solving abilities, and effective communication are important soft skills for identifying issues and collaborating with cross-functional teams. These skills ensure reliable maintenance, development, and modernization of mission-critical legacy systems that support large-scale business operations.

What Is a Mainframe Application Developer Job Description?

The job description of a mainframe application developer is to sustain the central data processing system, or mainframe. Common duties include designing applications, analyzing data, running reports, and deploying mainframe applications. This job requires a great deal of collaboration to keep the mainframe going and a strong understanding of mainframe languages. A key part of this role is to align the design of the mainframe with changing business needs.

What are mainframes and what do they do?

Mainframes are powerful computers used mainly by large organizations for critical applications, bulk data processing, large-scale transaction processing, and enterprise resource planning. They are known for their reliability, scalability, and security, making them essential for industries like banking, healthcare, and government. Mainframes can handle thousands of users and transactions simultaneously, supporting the core operations of many businesses.

What are some typical challenges faced by mainframe professionals when integrating legacy systems with modern technologies?

Mainframe professionals often encounter challenges when integrating legacy systems with newer technologies, such as ensuring data compatibility, managing security protocols, and minimizing downtime during migration. These tasks require a deep understanding of both the existing mainframe architecture and the modern platforms being introduced. Collaboration with cross-functional teams—including application developers, security specialists, and project managers—is essential to ensure seamless integration and to address potential issues proactively. Staying updated on the latest integration tools and best practices also helps in overcoming these challenges efficiently.

What is the difference between Mainframe vs Mainframe Developer?

AspectMainframeMainframe Developer
Primary RoleMaintains and manages mainframe hardware and systemsDesigns, develops, and tests mainframe applications
Skills & CertificationsKnowledge of mainframe hardware, OS, and basic scriptingProficiency in COBOL, JCL, and mainframe programming languages
Work EnvironmentData centers, enterprise IT departmentsDevelopment teams within mainframe environments
Industry UsageUsed by organizations with legacy systemsDevelops and maintains those legacy systems

While Mainframe professionals focus on maintaining the hardware and system infrastructure, Mainframe Developers specialize in creating and updating mainframe applications. Both roles require knowledge of mainframe environments, but their responsibilities differ significantly within the same industry.

More about Mainframe jobs
What are the most commonly searched types of Mainframe jobs in Wisconsin? The most popular types of Mainframe jobs in Wisconsin are:
What are popular job titles related to Mainframe jobs in Wisconsin? For Mainframe jobs in Wisconsin, the most frequently searched job titles are:
What job categories do people searching Mainframe jobs in Wisconsin look for? The top searched job categories for Mainframe jobs in Wisconsin are:
What cities in Wisconsin are hiring for Mainframe jobs? Cities in Wisconsin with the most Mainframe job openings:
Mainframe jobs near you
Infographic showing various Mainframe job openings in Wisconsin as of June 2026, with employment types broken down into 78% Full Time, 4% Part Time, 16% Contract, and 2% Nights. Highlights an 92% In-person, 2% Hybrid, and 6% Remote job distribution, with an average salary of $112,065 per year, or $53.9 per hour.
Mainframe Developer

Mainframe Developer

Apexon

Fitchburg, WI • On-site

$51.75 - $66.50/hr

Other

This job post has expired today. Applications are no longer accepted.

Job description

Key Responsibilities

  • Develop, enhance, maintain, and support mainframe applications using COBOL and Db2.
  • Perform production support activities, including troubleshooting, root cause analysis, and issue resolution.
  • Monitor and support batch processing environments and scheduled jobs.
  • Develop, modify, and maintain JCL scripts for batch execution and data processing.
  • Work with Control-M for job scheduling, monitoring, and batch workflow management.
  • Manage application migrations and deployments using Changeman.
  • Participate in on-call production support activities as required.

Required Skills

  • Strong experience in Mainframe Development.
  • Hands-on experience with COBOL programming.
  • Experience working with Db2 databases, including SQL development and optimization.
  • Proficiency in JCL (Job Control Language).
  • Experience supporting and troubleshooting batch processing systems.
  • Hands-on experience with Control-M job scheduling and monitoring.
  • Experience using Changeman for source code management and migrations.
  • Strong production support and incident resolution experience.



Email id Madhan.ravi@apexon.co

mContact : 248-603-262


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