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Mainframe Jobs in Baltimore, MD (NOW HIRING)

Serigor, Inc.

Senior .NET Developer (Onsite)

Columbia, MD · On-site

$53.75 - $70.75/hr

Experience supporting Mainframe modernization, automated code conversion, and enterprise transformation programs is highly preferred. Key Responsibilities: * Design, develop, enhance, and support ...

HRUCKUS

z/OS Systems Programmer

Annapolis, MD · On-site

They are seeking a Lead z/OS Systems Programmer to support, maintain, and enhance the client's IBM mainframe environment, ensuring the stability, security, and performance of mission-critical systems.

Metadimensions

JAVA Web Services

Woodlawn, MD · On-site

* This position required development support for redesigning the mainframe applications to web applications and web-services. * The responsibilities will also include maintaining in the current ...

Peraton

Mid-Level Software Test Engineer

Lanham, MD · On-site

Conduct functional and/or integration testing of multiple programs in an IBM mainframe, client/server or cloud environment. * Proactively identify use cases for test automation within supported ...

Peraton

Mid-Level Software Test Engineer

Lanham, MD · On-site

$66K - $106K/yr

Conduct functional and/or integration testing of multiple programs in an IBM mainframe, client/server or cloud environment. * Proactively identify use cases for test automation within supported ...

Peraton

Senior Software Test Engineer

Lanham, MD · Hybrid

$110K - $143K/yr

Conduct functional and/or integration testing of multiple programs in an IBM mainframe, client/server or cloud environment. * Proactively identify use cases for test automation within supported ...

Peraton

Senior Software Test Engineer

Lanham, MD · On-site

$80 - $128/hr

Conduct functional and/or integration testing of multiple programs in an IBM mainframe, client/server or cloud environment. * Proactively identify use cases for test automation within supported ...

Peraton

Mid-Level Software Test Engineer

Lanham, MD

Conduct functional and/or integration testing of multiple programs in an IBM mainframe, client/server or cloud environment. * Proactively identify use cases for test automation within supported ...

Zenius

Principal CICS Systems Programmer

Woodlawn, MD · On-site

Architect, design, integrate, implement, and manage the operation of large-scale, complex CICS environments (CICSPLEX, CPSM, SYSPLEX) across multiple LPAR mainframe systems. Leverage deep expertise ...

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All JobsMainframe JobsMainframe Jobs in Baltimore, MD

Mainframe information

See Baltimore, MD salary details

$10

$53

$71

How much do mainframe jobs pay per hour?

As of Aug 18, 2026, the average hourly pay for mainframe in Baltimore, MD is $53.04, according to ZipRecruiter salary data. Most workers in this role earn between $46.83 and $60.19 per hour, depending on experience, location, and employer.

What is a mainframe?

Mainframes are powerful computers used mainly by large organizations for critical applications, bulk data processing, large-scale transaction processing, and enterprise resource planning. They are known for their reliability, scalability, and security, making them essential for industries like banking, healthcare, and government. Mainframes can handle thousands of users and transactions simultaneously, supporting the core operations of many businesses.

What are the key skills and qualifications needed to thrive as a mainframe developer, and why are they important?

To excel as a Mainframe Developer, a strong background in COBOL, JCL, mainframe operating systems (like z/OS), and database management is essential, often supported by a degree in computer science or a related field. Familiarity with tools such as IBM DB2, CICS, VSAM, and mainframe version control systems is typically required, and certifications like IBM Certified System Programmer can be advantageous. Analytical thinking, problem-solving abilities, and effective communication are important soft skills for identifying issues and collaborating with cross-functional teams. These skills ensure reliable maintenance, development, and modernization of mission-critical legacy systems that support large-scale business operations.

What are some typical challenges faced by mainframe professionals when integrating legacy systems with modern technologies?

Mainframe professionals often encounter challenges when integrating legacy systems with newer technologies, such as ensuring data compatibility, managing security protocols, and minimizing downtime during migration. These tasks require a deep understanding of both the existing mainframe architecture and the modern platforms being introduced. Collaboration with cross-functional teams—including application developers, security specialists, and project managers—is essential to ensure seamless integration and to address potential issues proactively. Staying updated on the latest integration tools and best practices also helps in overcoming these challenges efficiently.

What is the difference between Mainframe vs Mainframe Developer?

AspectMainframeMainframe Developer
Primary RoleMaintains and manages mainframe hardware and systemsDesigns, develops, and tests mainframe applications
Skills & CertificationsKnowledge of mainframe hardware, OS, and basic scriptingProficiency in COBOL, JCL, and mainframe programming languages
Work EnvironmentData centers, enterprise IT departmentsDevelopment teams within mainframe environments
Industry UsageUsed by organizations with legacy systemsDevelops and maintains those legacy systems

While Mainframe professionals focus on maintaining the hardware and system infrastructure, Mainframe Developers specialize in creating and updating mainframe applications. Both roles require knowledge of mainframe environments, but their responsibilities differ significantly within the same industry.

Is mainframe a good career option?

Mainframe careers involve working with large-scale computer systems used by many organizations for critical applications. The role typically requires knowledge of programming languages like COBOL, skills in system maintenance, and certifications such as IBM Certified System Programmer. It offers stable employment opportunities and competitive salaries due to the specialized skill set involved.
More about Mainframe jobs

What are the most commonly searched types of Mainframe jobs in Baltimore, MD?

The most popular types of Mainframe jobs in Baltimore, MD are:

What are popular job titles related to Mainframe jobs in Baltimore, MD?

For Mainframe jobs in Baltimore, MD, the most frequently searched job titles are:

What job categories do people searching Mainframe jobs in Baltimore, MD look for?

The top searched job categories for Mainframe jobs in Baltimore, MD are:

What cities near Baltimore, MD are hiring for Mainframe jobs?

Cities near Baltimore, MD with the most Mainframe job openings:

Mainframe jobs near you
Infographic showing various Mainframe job openings in Baltimore, MD as of August 2026, with employment types broken down into 50% Full Time, 2% Temporary, and 48% Contract. Highlights an 86% In-person, and 14% Remote job distribution, with an average salary of $110,320 per year, or $53 per hour.

Senior .NET Developer (Onsite)

Serigor, Inc.

Columbia, MD • On-site

$53.75 - $70.75/hr

Full-time

Re-posted 25 days ago

Job description

Job Title: Senior .NET Developer (Onsite)
Location: Columbia, MD
Job Type: Full-Time
Job Description:
  • We are seeking a highly experienced Senior .NET Developer to support large-scale enterprise modernization initiatives focused on transforming legacy Mainframe applications into modern, cloud-ready .NET platforms.
  • The ideal candidate will have strong expertise in enterprise Microsoft technologies, distributed systems, APIs, database modernization, DevOps, and cloud platforms. This role involves working closely with modernization teams to support application conversion, remediation, integration, testing, and cloud enablement efforts.
  • Experience supporting Mainframe modernization, automated code conversion, and enterprise transformation programs is highly preferred.

Key Responsibilities:
  • Design, develop, enhance, and support enterprise-grade applications using modern .NET technologies
  • Support Mainframe-to-.NET modernization and migration initiatives, including AI-assisted code conversion efforts
  • Refactor and optimize converted code to align with modern .NET engineering standards and architecture principles
  • Develop RESTful APIs, gRPC services, backend services, batch jobs, and distributed integration solutions
  • Build scalable, maintainable, and high-performance applications
  • Support enterprise database modernization, data migration, DB2 integration, and SQL Server optimization
  • Collaborate with Mainframe SMEs, architects, QA teams, DevOps engineers, and business analysts
  • Support remediation, integration testing, regression testing, and functional equivalence validation
  • Contribute to CI/CD pipelines, DevOps automation, deployment processes, and modernization frameworks
  • Troubleshoot application issues, perform root cause analysis, debugging, and performance tuning
  • Work within AWS and Azure cloud environments
  • Develop technical documentation, deployment guides, and operational runbooks
  • Mentor junior developers and contribute to engineering best practices

Required Qualifications:
  • 10+ years of enterprise .NET development experience
  • Strong hands-on expertise with:
    • C#
    • ASP.NET / ASP.NET Core
    • .NET Framework / .NET Core / .NET 6+
    • Web APIs / RESTful Services
    • gRPC Services
    • Entity Framework / EF Core
    • Angular and/or React
    • JavaScript
    • LINQ
    • Windows Services and scheduled batch processing
    • PowerShell scripting
  • Strong experience building distributed and service-oriented applications
  • Solid understanding of:
    • Object-Oriented Programming (OOP)
    • SOLID principles
    • Design patterns
    • Secure coding practices
  • Experience with:
    • Microservices architecture
    • API integrations
    • Git and Azure DevOps
    • CI/CD pipelines and DevOps automation
    • Docker and containerization
    • Kubernetes or container orchestration platforms
  • Strong database expertise with:
    • Microsoft SQL Server
    • DB2
    • Stored procedures
    • Query optimization
    • Data migration and performance tuning
  • Experience with messaging/event technologies such as Kafka, RabbitMQ, or Azure Service Bus
  • Strong troubleshooting, debugging, and optimization skills
  • Experience working in Agile/Scrum environments
  • Excellent written and verbal communication skills

Cloud & Infrastructure Experience
AWS Experience with:
  • EC2
  • S3
  • IAM
  • CloudWatch
  • Cloud-based deployments and monitoring
  • Hybrid cloud environments

Microsoft Infrastructure Experience with:
  • Windows Server
  • IIS deployment and configuration
  • Enterprise application hosting and deployment support

Preferred Qualifications:
  • Experience supporting Mainframe modernization initiatives involving:
    • COBOL-to-.NET transformation
    • AI-assisted code conversion
    • Functional equivalence validation
    • Legacy application modernization
  • Exposure to Mainframe technologies such as:
    • COBOL
    • JCL
    • CICS
    • VSAM
    • DB2
    • IMS
  • Experience supporting government, financial, healthcare, tax, or other large enterprise modernization programs
  • Experience with automated modernization tools and modernization factory delivery models
  • Exposure to hybrid and multi-cloud enterprise environments

Apply