Demo

Senior Mainframe Developer (W2 only)

Kriscon
Jacksonville, FL Contractor | Full Time | Part Time
POSTED ON 4/14/2026
AVAILABLE BEFORE 5/13/2026

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


Salary : $65

If your compensation planning software is too rigid to deploy winning incentive strategies, it’s time to find an adaptable solution. Compensation Planning
Enhance your organization's compensation strategy with salary data sets that HR and team managers can use to pay your staff right. Surveys & Data Sets

What is the career path for a Senior Mainframe Developer (W2 only)?

Sign up to receive alerts about other jobs on the Senior Mainframe Developer (W2 only) career path by checking the boxes next to the positions that interest you.
Income Estimation: 
$92,103 - $118,230
Income Estimation: 
$131,745 - $167,716
Income Estimation: 
$144,503 - $184,592
Income Estimation: 
$102,541 - $137,871
Income Estimation: 
$153,752 - $200,235
Income Estimation: 
$101,441 - $130,752
Income Estimation: 
$111,369 - $141,168
Income Estimation: 
$117,871 - $153,580
Income Estimation: 
$109,939 - $144,341
Income Estimation: 
$114,500 - $144,633
Employees: Get a Salary Increase
View Core, Job Family, and Industry Job Skills and Competency Data for more than 15,000 Job Titles Skills Library

Job openings at Kriscon

  • Kriscon ALBANY, NY
  • Senior Data Integration & ETL Engineer Location : One Day in a week on site Albany NY Duration : Long-term Contract Client : Government Agency Start Date :... more
  • 9 Days Ago

  • Kriscon jacksonville, FL
  • Hi, Greetings from nDimensions Technologies , Please Review the Following Requirement and let me know if you are Interested. Please send your Updated Profi... more
  • 13 Days Ago

  • Kriscon ALBANY, NY
  • Hi, Greetings from nDimensions Technologies , Please Review the Following Requirement and let me know if you are Interested. Please send your Updated Profi... more
  • 4 Days Ago

  • Kriscon albany, NY
  • Automation Engineer with Sales force Must work onsite in Albany, NY Project or Program name the consultant will be working on Staff Augmentation Services r... more
  • 4 Days Ago


Not the job you're looking for? Here are some other Senior Mainframe Developer (W2 only) jobs in the Jacksonville, FL area that may be a better fit.

  • Citi Jacksonville, FL
  • The Senior Mainframe Developer is a senior level position responsible for establishing and implementing new or revised application systems and programs in ... more
  • 1 Day Ago

  • Jobs via Dice Jacksonville, FL
  • Dice is the leading career destination for tech experts at every stage of their careers. Our client, CompNova, is seeking the following. Apply via Dice tod... more
  • 2 Days Ago

AI Assistant is available now!

Feel free to start your new journey!