Demo

Mainframe Developer

ALTA IT Services, LLC
Rockville, MD Contractor
POSTED ON 7/2/2026
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
$52.00 to $65.00
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 Mainframe Developer?

Sign up to receive alerts about other jobs on the Mainframe Developer career path by checking the boxes next to the positions that interest you.
Income Estimation: 
$72,620 - $96,681
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 ALTA IT Services, LLC

Communications Strategist
Apply
  • ALTA IT Services, LLC Vienna, VA
  • Job Title: Communications Strategist Type: Contract Contractor Work Model: Remote Job Title: Communications Strategist Type: Contract Location: Remote Cont... more
  • 11 Days Ago
SOC Engineer
Apply
  • ALTA IT Services, LLC Washington, DC
  • SOC Engineer 100% remote DC Area Preferred - must be willing to come in once a quarter for a team meeting Must be able to obtain Public Trust clearance Com... more
  • 11 Days Ago
Data Scientist Sr
Apply
  • ALTA IT Services, LLC Reston, VA
  • Job Title: Senior Data Scientist – GenAI/NLP Focus Location: Reston, VA (OFFSITE) Type: 12 months contract Contractor Work Model: Remote with Quarterly ONS... more
  • 13 Days Ago
Sr AI Architect
Apply
  • ALTA IT Services, LLC Reston, VA
  • Job Title: Sr Doman Architect Location: Washington, DC AI Architect Location: Reston, VA (Hybrid – onsite roughly once every 1–2 months) Duration: 12-Month... more
  • 13 Days Ago
View More Jobs at ALTA IT Services, LLC

Not the job you're looking for? Here are some other Mainframe Developer jobs in the Rockville, MD area that may be a better fit.

Mainframe Developer
Apply
  • New York Technology Partners Mc Lean, VA
  • Job title: Mainframe Developer Location: McLean, VA (onsite) Duration: W2 Long term contract Mandatory skills: Experience in mainframe systems Experience i... more
  • 15 Days Ago
Mainframe Developer
Apply
  • Deloitte Washington, DC
  • Are you an experienced, passionate pioneer in technology who wants to work in a collaborative environment? As an experienced Mainframe Developer ,you will ... more
  • 27 Days Ago
View More Jobs

AI Assistant is available now!

Feel free to start your new journey!