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Senior Mainframe Developer / COBOL Senior Consultant

Jobs via Dice
Trenton, NJ Contractor
POSTED ON 5/7/2026
AVAILABLE BEFORE 6/4/2026
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Senior Mainframe Developer / COBOL Senior Consultant

Location: Trenton, NJ (Onsite)

Duration : Contract

Interview Type: In person

Job Summary

Candidates should have strong background in Cobol, ADABAS, and Natural. strong in JCL as well.

Job Description

We are looking for a Senior Mainframe Developer / COBOL Senior Consultant to evaluate existing systems and user needs in order to analyze, design, recommend, and implement information system changes. This position will be a full-time contract role and is onsite in Trenton, NJ.

What You Ll Do

  • Participate in development efforts supporting the project involving multiple legacy mainframe applications
  • Analyze existing legacy systems and provide code walkthroughs, logic analysis, and technical documentation to ITS development teams
  • Design, develop, modify, test, and maintain COBOL and NATURAL programs, along with associated JCL jobs, based on functional specifications and enhancement requests
  • Perform ongoing maintenance and enhancements to batch and online mainframe applications
  • Troubleshoot and resolve production issues, job failures, and system abends, including root cause analysis and corrective actions
  • Analyze ADABAS database structures, files, and access methods to support application development and system integration
  • Develop and maintain data feeds, file layouts, and interface processes between legacy systems and modernized ITS components
  • Participate in system design reviews, technical planning sessions, and code reviews
  • Produce and maintain technical documentation, including program specifications, data definitions, job flows, and system architecture documentation
  • Support system testing, integration testing, and user acceptance testing UAT
  • Implement best practices for mainframe development, including coding standards, version control, and change management
  • Assist with performance tuning and optimization of batch jobs, database access, and program execution
  • Provide production support for missioncritical applications and collaborate closely with analysts, architects, and development teams

What You Ll Need

Required:

  • Advanced experience with COBOL programming in enterprise mainframe environments
  • Strong expertise in JCL development and job scheduling
  • Extensive experience with NATURAL programming
  • Working knowledge of ADABAS database architecture and file structures
  • Experience analyzing and maintaining large legacy mainframe codebases
  • Strong troubleshooting and debugging skills for batch and online applications
  • Experience with system integration, data interfaces, and file transfer processes
  • Proficiency with mainframe utilities, debugging tools, and job monitoring tools
  • Strong documentation and communication skills
  • Ability to work independently while coordinating with multiple technical teams

Preferred:

  • Experience supporting taxation or government revenue systems
  • Familiarity with CICS and online transaction processing environments
  • Experience with data migration or modernization projects involving legacy mainframe applications
  • Knowledge of mainframe security, scheduling systems, and source code management tools
  • Experience working within largescale enterprise or government IT environments

Physical Demands

  • Ability to safely and successfully perform the essential job functions consistent with the ADA and other federal, state, and local standards
  • Sedentary work that involves sitting or remaining stationary most of the time with occasional need to move around the office to attend meetings
  • Ability to conduct repetitive tasks on a computer, utilizing a mouse, keyboard, and monitor

Hourly Wage Estimation for Senior Mainframe Developer / COBOL Senior Consultant in Trenton, NJ
$46.00 to $59.00
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