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Mainframe Developer

ALTA IT Services, LLC
Rockville, MD Contractor
POSTED ON 1/1/2026
AVAILABLE BEFORE 9/13/2026
Mainframe Developer
Location: Rockville, Maryland



Type: Contract


Compensation: 180k


Contractor Work Model: Onsite


ALTA IT Services is seeking a highly experienced Z/OS Mainframe Developer with deep expertise in Assembler, COBOL, and CICS. The ideal candidate will have a strong background in financial services systems and thrive in an Agile development environment.

Required Qualifications:
  • Minimum 10 years of experience in:
  • COBOL
  • DB2
  • Command-Level CICS
  • JCL
  • Batch processing
  • TSO/ISPF
  • Extensive hands-on experience with Assembler, COBOL, and CICS in a Z/OS Mainframe environment
  • Strong coding skills with proven adherence to development standards
  • Familiarity with SDLC and Agile methodologies
  • Experience with FIS OPF (Open Payments Framework) for ACH processing
  • FIS Connex experience is a plus, but not require
Responsibilities:
  • Analyze, define, and document technical designs
  • Design and develop new applications and integrate enhancements
  • Maintain and monitor systems post-deployment
  • Prepare test data, conduct testing, and debug code
  • Troubleshoot and resolve application issues
  • Conduct research and provide technical recommendations
  • Participate in full-cycle application development
Preferred Skills:
  • Experience with Serena ChangeMan ZMF
  • Development experience with IBM Mainframe Assembly language and Concept 14 macros
  • Strong analytical, problem-solving, and organizational skills
  • Effective verbal and written communication
  • Ability to manage conflicting priorities and adapt to changing requirements
  • Proficiency with database and presentation to



    #M-



    #DI-


    Ref: #850-Rockville (ALTA IT)

Hourly Wage Estimation for Mainframe Developer in Rockville, MD
$40.00 to $53.00
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