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Senior Mainframe Developer (W2 only)

Company:
Kriscon
Location:
Jacksonville, FL
Posted:
March 12, 2026
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Description:

Hi,

Greetings from nDimensions Technologies,

Please Review the Following Requirement and let me know if you are Interested. Please send your Updated Profile with Contact Details

Req: Senior Mainframe Developer (W2 only)

Location: Jacksonville, Florida, USA, 5 days work form office

Experience Level: Senior (10+ years)

Job Summary

We are seeking an experienced Senior Mainframe Developer to support the design, development, maintenance, and enhancement of mission critical enterprise applications. The ideal candidate will possess extensive hands-on expertise with mainframe technologies, including COBOL, DB2, JCL, CICS, IMS DB, and associated tools. This role requires strong analytical capabilities, a commitment to reliability, and the ability to provide comprehensive 24/7/365 production support for high availability systems.

Key Responsibilities

Design, develop, test, and implement new and existing mainframe business applications.

Provide continuous production support, including troubleshooting and resolution of system issues to ensure maximum system stability and availability.

Develop and maintain interfaces, reports, and utilities to support core business functions.

Conduct system integration testing and support user acceptance testing activities.

Review, enhance, and debug existing programs to improve performance, efficiency, and reliability.

Collaborate with cross-functional teams, including business analysts, testers, and infrastructure teams, to resolve issues and deliver enhancements.

Technical Environment

Languages & Tools: COBOL, JCL, Changeman, File Manager, IBM Debug Tool, dBeaver, IWS Job Scheduler, MQMON, TSO/ISPF

Databases: DB2, IMS DB

Transaction Management: CICS

File Systems: VSAM

Required Qualifications

5 to 15 years of progressive, hands-on experience with:

COBOL

DB2

JCL

IMS DB

CICS

VSAM

Proven experience supporting highly available systems in a 24/7/365 production environment.

Strong analytical, diagnostic, and problem solving skills.

Effective verbal and written communication abilities, with the capacity to collaborate across departments.

Preferred Qualifications

Experience using enterprise job scheduling tools such as IWS, CA7.

Knowledge of mainframe debugging and file management utilities.

Exposure to Agile or DevOps methodologies and practices.

Soft Skills

Strong organizational and time management capabilities.

Ability to work independently with minimal supervision, as well as collaboratively in a team environment.

Proactive approach with an emphasis on continuous improvement.

Effective communication skills for interactions with both technical and non technical stakeholders.

Flexibility and adaptability to evolving business priorities.

Thanks & Regards

Mark Reno

Senior IT Recruiter

Certified Minority Business Enterprise E-Verify Company

17177 N Laurel Park Drive Suite 445 Livonia MI 48152

Hi,

Greetings from nDimensions Technologies,

Please Review the Following Requirement and let me know if you are Interested. Please send your Updated Profile with Contact Details

Req: Senior Mainframe Developer (W2 only)

Location: Jacksonville, Florida, USA, 5 days work form office

Experience Level: Senior (10+ years)

Job Summary

We are seeking an experienced Senior Mainframe Developer to support the design, development, maintenance, and enhancement of mission critical enterprise applications. The ideal candidate will possess extensive hands-on expertise with mainframe technologies, including COBOL, DB2, JCL, CICS, IMS DB, and associated tools. This role requires strong analytical capabilities, a commitment to reliability, and the ability to provide comprehensive 24/7/365 production support for high availability systems.

Key Responsibilities

Design, develop, test, and implement new and existing mainframe business applications.

Provide continuous production support, including troubleshooting and resolution of system issues to ensure maximum system stability and availability.

Develop and maintain interfaces, reports, and utilities to support core business functions.

Conduct system integration testing and support user acceptance testing activities.

Review, enhance, and debug existing programs to improve performance, efficiency, and reliability.

Collaborate with cross-functional teams, including business analysts, testers, and infrastructure teams, to resolve issues and deliver enhancements.

Technical Environment

Languages & Tools: COBOL, JCL, Changeman, File Manager, IBM Debug Tool, dBeaver, IWS Job Scheduler, MQMON, TSO/ISPF

Databases: DB2, IMS DB

Transaction Management: CICS

File Systems: VSAM

Required Qualifications

5 to 15 years of progressive, hands-on experience with:

COBOL

DB2

JCL

IMS DB

CICS

VSAM

Proven experience supporting highly available systems in a 24/7/365 production environment.

Strong analytical, diagnostic, and problem solving skills.

Effective verbal and written communication abilities, with the capacity to collaborate across departments.

Preferred Qualifications

Experience using enterprise job scheduling tools such as IWS, CA7.

Knowledge of mainframe debugging and file management utilities.

Exposure to Agile or DevOps methodologies and practices.

Soft Skills

Strong organizational and time management capabilities.

Ability to work independently with minimal supervision, as well as collaboratively in a team environment.

Proactive approach with an emphasis on continuous improvement.

Effective communication skills for interactions with both technical and non technical stakeholders.

Flexibility and adaptability to evolving business priorities.

Thanks & Regards

Mark Reno

Senior IT Recruiter

Certified Minority Business Enterprise E-Verify Company

17177 N Laurel Park Drive Suite 445 Livonia MI 48152

Apply