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Mainframes Developer Jobs in Milwaukee, WI (NOW HIRING)

Ampcus Inc

Cobol / Mainframe Developer

Milwaukee, WI · On-site

$48.25 - $62/hr

They are seeking a Cobol / Mainframe Developer to work within Card Management Systems, focusing on backend business logic and coding experience. The role requires strong expertise in Cobol ...

Wipro Limited

Mainframe Developer

Brookfield, WI · On-site

$60K - $135K/yr

Job Title: Mainframe Developer City: Brookfield State/Province: Wisconsin Posting Start Date: 6/29/26 Wipro Limited (NYSE: WIT, BSE: 507685, NSE: WIPRO) is a leading technology services and ...

ClifyX

Mainframe Developer - Brookfield, WI

Brookfield, WI · On-site

$46.50 - $59.75/hr

ClifyX is seeking a Mainframe Developer to join their team. The role involves full life cycle development of business applications, supporting and modifying existing applications, and driving the ...

Highbrow LLC

Mainframe Sr Developer

Milwaukee, WI · On-site

$90 - $120/hr

Mainframe Sr Developer Job ID: 2024-13158 Job Location: Milwaukee, WI or Lincoln, NE (100% Onsite) Job Travel Location(s): # Positions: 3 Employment Type: W2 Duration:Long Term # of Layers:0 Work ...

New

Accenture

Mainframe Specialist

Milwaukee, WI

$70K - $196K/yr

About the Role Are you a seasoned Mainframe Specialist with deep, hands-on command of COBOL, JCL ... Partner with cross-functional teams-architects, developers, QA, and business analysts-to gather ...

CYNET SYSTEMS

Mainframe Programmer

Brookfield, WI · On-site

$41 - $46/hr

Pay Range: $41hr - $46hr Requirement/Must Have: * 1+ years of experience in Mainframe Technologies COBOL, VSAM, DB2, CICS, JCL. * Knowledge in GIT and IDZ is an additional advantage.​​​​​ ...

CYNET SYSTEMS

Mainframe Programmer

Brookfield, WI · On-site

$41 - $46/hr

Pay Range: $41hr - $46hr Requirement/Must Have: * 1+ years of experience in Mainframe Technologies COBOL, VSAM, DB2, CICS, JCL. * Knowledge in GIT and IDZ is an additional advantage.​​​​​ ...

CYNET SYSTEMS

Mainframe Programmer

Brookfield, WI · On-site

$41 - $46/hr

Pay Range: $41hr - $46hr Requirement/Must Have: * 1+ years of experience in Mainframe Technologies COBOL, VSAM, DB2, CICS, JCL. * Knowledge in GIT and IDZ is an additional advantage.​​​​​ ...

CYNET SYSTEMS

Mainframe Programmer

Brookfield, WI · On-site

$41 - $46/hr

Pay Range: $41hr - $46hr Requirement/Must Have: * 1+ years of experience in Mainframe Technologies COBOL, VSAM, DB2, CICS, JCL. * Knowledge in GIT and IDZ is an additional advantage.​​​​​ ...

CYNET SYSTEMS

Mainframe Programmer

Brookfield, WI · On-site

$41 - $46/hr

Pay Range: $41hr - $46hr Requirement/Must Have: * 1+ years of experience in Mainframe Technologies COBOL, VSAM, DB2, CICS, JCL. * Knowledge in GIT and IDZ is an additional advantage.​​​​​ ...

CYNET SYSTEMS

Mainframe Programmer

Brookfield, WI · On-site

$41 - $46/hr

Pay Range: $41hr - $46hr Requirement/Must Have: * 1+ years of experience in Mainframe Technologies COBOL, VSAM, DB2, CICS, JCL. * Knowledge in GIT and IDZ is an additional advantage.​​​​​ ...

US Bank

z/OS Systems Engineer

Brookfield, WI · On-site

Bank is seeking a z/OS Systems Programmer that has extensive experience in mainframe technologies with an emphasis on installation/upgrading, tuning, and troubleshooting of z/OS and third-party ...

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All JobsMainframes Developer JobsMainframes Developer Jobs in Milwaukee, WI

Mainframes Developer information

See Milwaukee, WI salary details

$47.3K

$110.2K

$163.6K

How much do mainframes developer jobs pay per year?

As of Aug 21, 2026, the average yearly pay for mainframes developer in Milwaukee, WI is $110,195.00, according to ZipRecruiter salary data. Most workers in this role earn between $88,700.00 and $128,100.00 per year, depending on experience, location, and employer.

What is the difference between Mainframes Developer vs Mainframes Analyst?

AspectMainframes DeveloperMainframes Analyst
Required CredentialsTypically a degree in Computer Science or related field; certifications like IBM Certified SpecialistSimilar credentials; often holds certifications in mainframe systems and analysis
Work EnvironmentDevelops, codes, and tests mainframe applications in a software development settingAnalyzes existing mainframe systems, gathers requirements, and supports system improvements
Employer & Industry UsageUsed by banks, insurance companies, and large enterprises for application developmentEmployed in similar industries for system analysis, troubleshooting, and process optimization

While both roles require knowledge of mainframe systems and similar credentials, Mainframes Developers focus on creating and maintaining mainframe applications, whereas Mainframes Analysts analyze existing systems to improve performance and efficiency. Both roles are vital in large enterprise IT environments.

Is a mainframes developer a good career?

A mainframes developer is a specialized IT professional who maintains and develops applications on mainframe systems, which are used by large organizations for critical data processing. The role offers stable employment, competitive salaries, and opportunities to work with legacy systems and mainframe programming languages like COBOL. However, it requires specific skills and certifications, and the field may have limited growth compared to emerging technologies.

Is a mainframes developer still in demand?

Mainframes developers are still in demand in industries such as finance, government, and healthcare that rely on legacy systems. They typically work with COBOL, JCL, and mainframe environments, and demand persists due to the ongoing need to maintain and upgrade existing mainframe applications. However, the number of new positions is limited compared to emerging technologies, and skills in mainframe modernization are increasingly valued.

What does a mainframes developer do?

A mainframes developer designs, codes, tests, and maintains applications running on mainframe computers, often using languages like COBOL, PL/I, or Assembler. They ensure the stability, security, and efficiency of large-scale enterprise systems, frequently working with legacy code and mainframe-specific tools in a structured environment.

What are popular job titles related to Mainframes Developer jobs in Milwaukee, WI?

For Mainframes Developer jobs in Milwaukee, WI, the most frequently searched job titles are:

What job categories do people searching Mainframes Developer jobs in Milwaukee, WI look for?

The top searched job categories for Mainframes Developer jobs in Milwaukee, WI are:

Mainframes Developer jobs near you
Infographic showing various Mainframes Developer job openings in Milwaukee, WI as of August 2026, with employment types broken down into 81% Full Time, 5% Part Time, and 14% Contract. Highlights an 83% Physical, 5% Hybrid, and 12% Remote job distribution, with an average salary of $110,195 per year, or $53 per hour.

Cobol / Mainframe Developer

Ampcus Inc

Milwaukee, WI • On-site

$48.25 - $62/hr

Full-time

Re-posted 4 days ago

Job description

Job Summary:
Ampcus Inc. is a certified global provider of a broad range of Technology and Business consulting services. They are seeking a Cobol / Mainframe Developer to work within Card Management Systems, focusing on backend business logic and coding experience. The role requires strong expertise in Cobol programming and Mainframe environments, along with experience in payment transactions.
Responsibilities:
• Must need to have an experience with Mainframe.
• Need a strong experience with Cobol Programming and JCL.
• Will be responsible for handling backend business logics.
• Experience with Payment Transactions or Debit Transactions area would be nice to have.
• Must need to have hands-on coding experience.
• Previous Client experience is a great to have.
Qualifications:
Required:
• Bachelor's degree in Computer Science, Information Technology or equivalent experience.
• 8 years of software development engineering experience.
• Working knowledge in Linux, UNIX & z/OS operating systems.
• Proficient with Mainframe Development as well as modern Object-Oriented development.
• Need to be able to develop in both a legacy Mainframe TSO environment and also a modern server/container environment using common IDE’s and development tools.
• Knowledge and experience in transformation/modernization of processing high volumes of data via Mainframe processing to scalable On-prem Distributed or Cloud processing via microservices and containers.
• Knowledge of the following: File Transmission (FTP/NDM) & batch processing in very high-volume settings is required.
• Experience in technical design writing and documentation.
• Work independently and collaborate in team design sessions.
• Strong unit testing skills.
• Flexibility to be on on-call support, as required.
• Excellent written and verbal communication skills.
• Experience in Financial Services industry.
Preferred:
• Experience with Payment Transactions or Debit Transactions area would be nice to have.
• Previous Client experience is a great to have.
• Knowledge of event driven architecture and common event processing models and platforms is desired.
• Experience in decomposing and rewriting legacy processes and systems into more modern infrastructures a plus.
• Familiarity in microservice architectures and containers (Kubernetes/K8s, OpenShift, Docker) a plus.
• Familiarity in processing in a cloud (Azure, AWS) environment a plus.
• Familiarity in Domain Driven Design a plus.
Company:
Ampcus is a global business, technology consulting and an staff augmentation firm specializing in AI/ML,digital solutions, Cybersecurity & Risk management, Testing, Forensics & Fraud services and human capital management. Founded in 2004, the company is headquartered in Chantilly, USA, with a team of 1001-5000 employees. The company is currently Late Stage.
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About Ampcus

Sourced by ZipRecruiter

Ampcus Inc. is a ISO 20000, ISO 27000, ISO 9001, CMMI DEV/3 SM and CMMI SVC/3 SM certified global provider of a broad range of Technology and Business consulting services. From strategy to execution, our disciplined yet flexible approach starts and ends with our clients. By listening hard and working harder, client goals become our goals. Their success is our satisfaction. It’s why our clients sleep well at night. We believe that the success of an engagement is determined by strong project management, as well as clear communication and mutual commitment working collaboratively. Our methodology begins with listening to the customer about their needs, then working with their team to gain a clear understanding of the requirements, while providing knowledge transfer of best practices for the organization.

Industry

It services

Company size

1,001 - 5,000 Employees

Headquarters location

Chantilly, VA, US

Year founded

2004

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