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Mainframes Developer Jobs in Maryland (NOW HIRING)

Serigor

Senior Mainframe Developer

Columbia, MD · Hybrid

Senior Mainframe Developer Location: Columbia, MD Job Type: Full-Time Position Overview We are seeking a Senior Mainframe Developer to support enterprise modernization and transformation initiatives ...

CGI Inc.

Mainframe Developer

Baltimore, MD · On-site

$48.75 - $62.50/hr

Mainframe Developer Category: Software Development/ Engineering Main location: United States, Maryland, Baltimore Position ID:J0526-2523 Employment Type: Full Time U.S. - The best version of me By ...

New

JS Consulting

Sr. Mainframe Developer

Woodlawn, MD · On-site

$51 - $65.50/hr

Job Title- Sr. Mainframe Developer Project Location - Woodlawn, MD (5 days per week onsite) Duration- 6+ months contract Skills: Strong experience with IBM z/OS (OS/390/MVS) environment developing ...

GBTI Solutions Inc

ALC Developer

Lanham, MD · On-site +1

Job Summary Provides specialized expertise in low-level mainframe programming to support critical MFRA legacy systems and high-performance components. Key Responsibilities Design, code, debug, and ...

Anivas Tech LLC

Mainframe SRE

Upper Marlboro, MD · On-site

$48.50 - $62.50/hr

Collaborate with DevOps and development teams to extend CI/CD practices into mainframe pipelines * Document standard operating procedures, runbooks, and post-incident reviews * Participate in on-call ...

MissionStaff

COBOL Developer

Woodlawn, MD

$52.25 - $70.75/hr

COBOL Developer We are seeking experienced COBOL Developers to support a large federal technology ... This is a strong opportunity for senior mainframe professionals who want to support a long-term ...

kgs

Mainframe Project Manager

Baltimore, MD

$48.75 - $62.50/hr

OCSS is responsible for application programming, data transmission, and security access for OCSS ... DB2/JCL/COBOL/VSAM/SFTP/GDG's and other mainframe skills preferred * TSO required * Sql Server, My ...

kgs

Mainframe Project Manager

Baltimore, MD

$48.75 - $62.50/hr

OCSS is responsible for application programming, data transmission, and security access for OCSS ... DB2/JCL/COBOL/VSAM/SFTP/GDG's and other mainframe skills preferred * TSO required * Sql Server, My ...

Koniag, Inc.

Mainframe Project Manager

Baltimore, MD · On-site

$90K - $110K/yr

OCSS is responsible for application programming, data transmission, and security access for OCSS ... DB2/JCL/COBOL/VSAM/SFTP/GDG's and other mainframe skills preferred * TSO required * Sql Server, My ...

CGI Inc.

Mainframe Storage Engineer

Baltimore, MD · On-site

Mainframe Storage Engineer Category: Software Development/ Engineering Main location: United States, Maryland, Baltimore Position ID:J0526-1645 Employment Type: Full Time U.S. - What we do matters By ...

Serigor, Inc.

Senior .NET Developer (Onsite)

Columbia, MD · On-site

$53.75 - $70.75/hr

Experience supporting Mainframe modernization, automated code conversion, and enterprise ... NET engineering standards and architecture principles * Develop RESTful APIs, gRPC services ...

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Mainframes Developer information

What is the difference between Mainframes Developer vs Mainframes Analyst?

AspectMainframes DeveloperMainframes Analyst
Required CredentialsTypically a degree in Computer Science or related field; certifications like IBM Certified SpecialistSimilar credentials; often holds certifications in mainframe systems and analysis
Work EnvironmentDevelops, codes, and tests mainframe applications in a software development settingAnalyzes existing mainframe systems, gathers requirements, and supports system improvements
Employer & Industry UsageUsed by banks, insurance companies, and large enterprises for application developmentEmployed in similar industries for system analysis, troubleshooting, and process optimization

While both roles require knowledge of mainframe systems and similar credentials, Mainframes Developers focus on creating and maintaining mainframe applications, whereas Mainframes Analysts analyze existing systems to improve performance and efficiency. Both roles are vital in large enterprise IT environments.

What are popular job titles related to Mainframes Developer jobs in Maryland? For Mainframes Developer jobs in Maryland, the most frequently searched job titles are:
What job categories do people searching Mainframes Developer jobs in Maryland look for? The top searched job categories for Mainframes Developer jobs in Maryland are:
Mainframes Developer jobs near you
Infographic showing various Mainframes Developer job openings in Maryland as of May 2026, with employment types broken down into 21% Full Time, and 79% Contract. Highlights an 92% In-person, and 8% Hybrid job distribution.
Senior Mainframe Developer

Senior Mainframe Developer

Serigor

Columbia, MD • Hybrid

Other

Posted 6 days ago

Job description

Senior Mainframe Developer

Location: Columbia, MD

Job Type: Full-Time

Position Overview

We are seeking a Senior Mainframe Developer to support enterprise modernization and transformation initiatives involving complex IBM Mainframe systems.

This role requires deep hands-on expertise in Mainframe technologies, legacy application analysis, modernization strategies, and technical expertise. The ideal candidate will perform assessment and modernization efforts, collaborate with client stakeholders and engineering teams, and support large-scale migration initiatives in enterprise environments.

Key Responsibilities

  • Analyze, maintain, support, and modernize large-scale Mainframe applications and legacy systems
  • Work extensively with:
  • COBOL
  • JCL and PROCs
  • CICS
  • VSAM
  • DB2
  • IMS
  • BMS Maps
  • Batch processing environments
  • Perform technical discussions, modernization workshops, and system assessment sessions with client stakeholders
  • Serve as the primary Mainframe technical POC for modernization activities, dependencies, and integration efforts
  • Analyze legacy business workflows, application logic, system integrations, and data dependencies
  • Recommend modernization, migration, remediation, and transformation strategies
  • Support automated code analysis, remediation, and modernization workflows
  • Document business rules, technical processes, data mappings, reconciliation logic, and functional behavior
  • Collaborate with architects, QA teams, DevOps teams, business analysts, and cross-functional engineering teams
  • Perform source code inventory analysis, dependency mapping, and technical assessment activities
  • Support reconciliation, validation, testing, and stabilization activities
  • Assist with enterprise data migration and synchronization initiatives
  • Troubleshoot production issues, optimize batch workloads, and support application enhancements
  • Participate in modernization factory workflows, including automated analysis and transformation activities
  • Prepare technical documentation, modernization artifacts, operational runbooks, and system analysis reports
  • Provide mentorship and technical expertise to engineering and modernization teams

Required Qualifications

  • 10-15 years of hands-on experience with enterprise Mainframe applications
  • Strong expertise with:
  • COBOL
  • JCL and PROCs
  • CICS
  • VSAM
  • DB2
  • IMS
  • BMS Maps
  • Batch processing systems
  • Strong understanding of:
  • Enterprise Mainframe architectures
  • Transaction processing systems
  • Batch processing frameworks
  • Legacy application workflows
  • Enterprise integration patterns
  • Extensive experience supporting large-scale legacy modernization initiatives
  • Experience working with automated code analysis tools, transformation pipelines, and modernization accelerators
  • Strong client-facing communication and stakeholder management skills
  • Experience serving as a technical lead on enterprise modernization programs
  • Strong understanding of enterprise business processes, data flows, and system dependencies
  • Exposure to:
  • Distributed systems
  • APIs and middleware
  • Hybrid integration architectures
  • Cloud modernization initiatives
  • Familiarity with AWS and/or Azure environments
  • Strong troubleshooting, analytical, and problem-solving skills
  • Ability to drive technical modernization activities independently and hands-on in fast-paced enterprise environments
  • Excellent written and verbal communication skills

Preferred Qualifications

  • Experience supporting enterprise modernization and migration programs
  • Experience with AI-assisted code analysis and remediation workflows
  • Experience working with modernization factories, automated conversion tools, and migration accelerators
  • Experience working in Agile/Scrum delivery environments
  • Experience supporting government, financial, healthcare, tax, or other large enterprise modernization programs
  • Familiarity with cloud-native modernization and hybrid cloud integration strategies

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