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Mainframe Computer Jobs in Washington (NOW HIRING)

GBTI Solutions Inc

COBOL Developer

Lanham, MD · On-site

$50.25 - $67.75/hr

Bachelor's degree in Computer Science, Information Technology, or related field * At least 8 years of hands-on experience in COBOL, CICS, and DB2 development in a mainframe environment * Proven ...

USM

Locals and Nearby TL Datastage Developer

Reston, VA · On-site

Able to do analysis and make code changes to the DataStage ETL, Mainframe and Unix jobs. Basic Requirements: Bachelor's degree in Computer Science or Engineering or equivalent working experience At ...

GBTI Solutions Inc

COBOL Developer

Lanham, MD · On-site

$50.25 - $67.75/hr

Bachelor's degree in Computer Science, Information Technology, or related field * At least 8 years of hands-on experience in COBOL, CICS, and DB2 development in a mainframe environment * Proven ...

GBTI Solutions Inc

COBOL Developer

Lanham, MD · On-site +1

$50.25 - $67.75/hr

Bachelors degree in Computer Science, Information Technology, or related field * At least 8 years of hands-on experience in COBOL, CICS, and DB2 development in a mainframe environment * Proven ...

SAIC

Senior Enterprise Architect

Washington, DC · Remote

Provide Technical guidance and Expert advice in areas of Mainframe Modernization, including ... Bachelor's degree in computer science, Information Technology, or related field * 14 years or more ...

SAIC

Senior Enterprise Architect

Washington, DC · Remote

Provide Technical guidance and Expert advice in areas of Mainframe Modernization, including ... Bachelor's degree in computer science, Information Technology, or related field * 14 years or more ...

Pace solutions inc

ETL - Talend

Washington, DC · On-site

... Mainframe technologies will be an added advantage Qualifications Additional Information Thanks and Regards, Amer Khan Pace Computer Solutions Inc. (An Inc. 500 Company) 10500 Little Patuxent Pkwy ...

Pace solutions inc

ETL - Talend

Washington, DC

... Mainframe technologies will be an added advantage Additional Information Thanks and Regards, Amer Khan Pace Computer Solutions Inc. (An Inc. 500 Company) 10500 Little Patuxent Pkwy, Suite 310 ...

System One

Be Seen First

Performance Tester - Public Trust

New Carrollton, MD · On-site

... of mainframe and web-based performance systems · Bachelor's degree in Computer Science, Information Systems, or related field Company Description System One is a leading provider of specialized ...

E Logic

IT Software Developer III

Washington, DC · On-site

$95K/yr

Bachelor's degree in Computer Science, Software Engineering, Information Systems, or related field ... Mainframe development environments * Batch processing systems * Experience with: * CMPlus * IPF

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What is a Mainframe Computer job?

A Mainframe Computer job typically involves working with large-scale, high-performance computing systems used by enterprises for critical applications such as banking, finance, and healthcare. Responsibilities may include system administration, application development, performance monitoring, and troubleshooting. Professionals in this field often work with mainframe operating systems like z/OS and programming languages such as COBOL, JCL, and REXX. This role requires strong analytical skills and knowledge of legacy systems, as mainframes continue to be integral to many industries.

What are the key skills and qualifications needed to thrive in the Mainframe Computer position, and why are they important?

To thrive as a Mainframe Computer Operator or Specialist, you need a solid understanding of mainframe hardware, operating systems (such as IBM z/OS), and data center best practices, alongside a degree in computer science or related experience. Familiarity with job scheduling tools (like JCL), monitoring utilities, and expertise in mainframe programming languages (such as COBOL) are commonly required, and certifications such as IBM Certified System Programmer are advantageous. Attention to detail, strong troubleshooting abilities, and excellent communication skills are essential for coordinating with IT teams and resolving system issues. These competencies ensure the reliability, security, and efficiency of mission-critical mainframe systems in large organizations.

What are some common challenges faced by mainframe professionals in day-to-day operations?

Mainframe professionals often face challenges such as managing complex batch job schedules, troubleshooting unexpected system outages, and ensuring data security while dealing with legacy applications. The work requires careful monitoring for performance bottlenecks and rapid response to issues, often during off-hours or on-call rotations. Collaboration with programming, network, and system administration teams is frequent, as mainframe environments are integral to business-critical services. Successfully handling these challenges helps maintain uptime and reliability for the organization’s core operations.
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Mainframe Computer jobs near you
Infographic showing various Mainframe Computer job openings in Washington as of May 2026, with employment types broken down into 94% Full Time, and 6% Contract. Highlights an 91% In-person, 3% Hybrid, and 6% Remote job distribution.
COBOL Developer

COBOL Developer

GBTI Solutions Inc

Lanham, MD • On-site

$50.25 - $67.75/hr

Full-time

This job post has expired 1 day ago. Applications are no longer accepted.

Job description

Job Summary
Serves as a technical leader providing full lifecycle support for legacy IRS mainframe systems within the MFRA Branch. This role is responsible for analysis, design, coding, testing, and implementation of Operations & Maintenance (O&M) activities as well as complex legislative and Filing Season changes.
Key Responsibilities 
  • Analyze, design, code, test, and implement COBOL/CICS/DB2 applications and modifications 
  • Perform iSAT testing, FIT readiness, defect resolution, and production deployments using Endevor 
  • Support Business Master File (BMF/IMF) systems, CFOL command codes, and interfacing applications 
  • Conduct performance tuning, troubleshooting, and rapid resolution of P1/P2 production incidents 
  • Develop and maintain OneSDLC/ELC artifacts (COH, PRP, SDP, SDSR, STP, etc.) 
  • Provide mentoring and knowledge transfer to IRS personnel 
  • Ensure compliance with PECP Guidelines, ServiceNow, and IRS security requirements
Minimum Qualifications 
  • Bachelor’s degree in Computer Science, Information Technology, or related field 
  • At least 8 years of hands-on experience in COBOL, CICS, and DB2 development in a mainframe environment 
  • Proven experience with legacy IRS or equivalent high-volume transactional systems 
  • Strong knowledge of JCL/AEV JCL, File Manager, IBM Debugger, Endevor, and ELM Suite (DOORS Next, ETM, Jira) 
  • Experience with Filing Season readiness, legislative changes, and production support