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Senior Mainframe Developer Jobs in Gaithersburg, MD

System One

Java Mainframe Developer

Vienna, VA · Remote

$58.50 - $74.75/hr

Java Developer Location: Remote Type: Contract Responsibilities * Design, develop, and enhance complex software applications supporting mission-critical, time-sensitive initiatives focused on ...

System One

Java Mainframe Developer

Vienna, VA · Remote

$58.50 - $74.75/hr

Java Developer Location: Remote Type: Contract Responsibilities * Design, develop, and enhance complex software applications supporting mission-critical, time-sensitive initiatives focused on ...

System One

Java Mainframe Developer

Vienna, VA · Remote

$58.50 - $74.75/hr

Java Developer Location: Remote Type: Contract Responsibilities * Design, develop, and enhance complex software applications supporting mission-critical, time-sensitive initiatives focused on ...

System One

Java Mainframe Developer

Vienna, VA · Remote

$58.50 - $74.75/hr

Java Developer Location: Remote Type: Contract Responsibilities * Design, develop, and enhance complex software applications supporting mission-critical, time-sensitive initiatives focused on ...

System One

Java Mainframe Developer

Vienna, VA · Remote

$58.50 - $74.75/hr

Java Developer Location: Remote Type: Contract Responsibilities * Design, develop, and enhance complex software applications supporting mission-critical, time-sensitive initiatives focused on ...

System One

Java Mainframe Developer

Vienna, VA · Remote

$58.50 - $74.75/hr

Java Developer Location: Remote Type: Contract Responsibilities * Design, develop, and enhance complex software applications supporting mission-critical, time-sensitive initiatives focused on ...

Creative G C

Mainframe z/OS System Programmer

Columbia, MD · Remote

$56.25 - $71.75/hr

As an US Citizen and as a Senior System Programmer (Mainframe) supporting IBM z15 and z16 mainframe and z/OS 2.5 or higher operating system. As part of IBM zCloud resource pool, supporting the zCloud ...

Accenture

Mainframe Specialist

Herndon, VA · On-site

$70K - $196K/yr

Partner with cross-functional teams-architects, developers, QA, and business analysts-to gather ... Collaborate with senior leadership to secure executive sponsorship and organizational buy-in for ...

Serigor, Inc.

Senior .NET Developer (Onsite)

Columbia, MD · On-site

$53.75 - $70.75/hr

Job Title: Senior .NET Developer (Onsite) Location: Columbia, MD Job Type: Full-Time * We are ... Experience supporting Mainframe modernization, automated code conversion, and enterprise ...

Avance Consulting Services

MainFrame

Mclean, VA

My name is Ahmed and I am a Sr. Technical Recruiter with Avance Consulting. We are a leading ... It provides strategic business consulting, technology, engineering and outsourcing services to help ...

TheStaffed

Sr DataStage Engineer

Mclean, VA · On-site

Our client is seeking a Senior DataStage Engineer to design, develop, and maintain enterprise ETL ... Modernize legacy mainframe batch processes by translating existing COBOL/JCL logic into DataStage ...

Resource Point LLC

Java Full Stack Developer Senior

Reston, VA · On-site

$54.50 - $70.50/hr

The legacy mainframe application is used for non-performing loans and will be replaced with multiple applications for specific functions. Requirements * Project requires a Senior Full Stack Developer ...

System One

Senior Application Engineer

Vienna, VA · Remote

Senior Application Engineer Location: Remote Pay Rate: Open to Both C2C and W2 options Position ... Expertise in mainframe programming languages and development tools such as JCL, COBOL, DB2 and IBM ...

System One

Senior Application Engineer

Vienna, VA · Remote

Senior Application Engineer Location: Remote Pay Rate: Open to Both C2C and W2 options Position ... Expertise in mainframe programming languages and development tools such as JCL, COBOL, DB2 and IBM ...

System One

Senior Application Engineer

Vienna, VA · Remote

Senior Application Engineer Location: Remote Pay Rate: Open to Both C2C and W2 options Position ... Expertise in mainframe programming languages and development tools such as JCL, COBOL, DB2 and IBM ...

System One

Senior Application Engineer

Vienna, VA · Remote

Senior Application Engineer Location: Remote Pay Rate: Open to Both C2C and W2 options Position ... Expertise in mainframe programming languages and development tools such as JCL, COBOL, DB2 and IBM ...

System One

Senior Application Engineer

Vienna, VA · Remote

Senior Application Engineer Location: Remote Pay Rate: Open to Both C2C and W2 options Position ... Expertise in mainframe programming languages and development tools such as JCL, COBOL, DB2 and IBM ...

System One

Senior Application Engineer

Vienna, VA · Remote

Senior Application Engineer Location: Remote Pay Rate: Open to Both C2C and W2 options Position ... Expertise in mainframe programming languages and development tools such as JCL, COBOL, DB2 and IBM ...

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Senior Mainframe Developer information

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How much do senior mainframe developer jobs pay per hour?

As of Aug 22, 2026, the average hourly pay for senior mainframe developer in Gaithersburg, MD is $62.29, according to ZipRecruiter salary data. Most workers in this role earn between $58.46 and $68.03 per hour, depending on experience, location, and employer.

What is a senior mainframe developer?

Senior Mainframe Developers are experienced professionals who design, develop, and maintain mainframe systems—large-scale computers used by organizations for critical applications, bulk data processing, and enterprise resource planning. They are proficient in languages like COBOL, JCL, and Assembler, and often work with databases and transaction processing systems. Their responsibilities include troubleshooting system issues, optimizing performance, mentoring junior developers, and ensuring the reliability and security of mainframe operations.

What are some common challenges faced by senior mainframe developers when integrating legacy systems with modern technologies?

Senior Mainframe Developers often encounter challenges when integrating legacy mainframe systems with newer technologies such as cloud platforms, APIs, or microservices. These challenges include ensuring data consistency, maintaining system security, and minimizing downtime during migrations. Collaboration with cross-functional teams, such as infrastructure engineers and application developers, is key to developing seamless integration solutions. Staying up-to-date with modernization tools and best practices can help address these complexities and support the organization's digital transformation goals.

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

To thrive as a Senior Mainframe Developer, you need deep expertise in mainframe programming languages (like COBOL, JCL, and PL/I), systems analysis, and a strong understanding of legacy application architectures, typically supported by a degree in computer science or related experience. Familiarity with tools such as IBM z/OS, DB2, CICS, and version control systems is essential, along with relevant certifications like IBM Certified System Programmer. Excellent problem-solving, communication, and leadership skills help you collaborate effectively and mentor junior developers. These skills are crucial for maintaining mission-critical systems, ensuring reliability, and guiding modernization efforts in complex enterprise environments.

What job categories do people searching Senior Mainframe Developer jobs in Gaithersburg, MD look for?

The top searched job categories for Senior Mainframe Developer jobs in Gaithersburg, MD are:

What cities near Gaithersburg, MD are hiring for Senior Mainframe Developer jobs?

Cities near Gaithersburg, MD with the most Senior Mainframe Developer job openings:

Senior Mainframe Developer jobs near you
Infographic showing various Senior Mainframe Developer job openings in Gaithersburg, MD as of August 2026, with employment types broken down into 80% Full Time, 5% Part Time, and 15% Contract. Highlights an 82% Physical, 6% Hybrid, and 12% Remote job distribution, with an average salary of $129,564 per year, or $62.3 per hour.

Senior Mainframe Automation Engineer (IBM SA z/OS & NetView)

Kyyba Inc

Vienna, VA • On-site

$104K - $137K/yr

Other

Posted 3 days ago

New

Job description

Required Qualifications

Experience

  • 10+ years of experience in Mainframe Systems Automation and z/OS Operations.
  • Expert-level experience with IBM System Automation for z/OS (SA z/OS), including:
    • Administration
    • Configuration
    • Policy Development
    • Resource Automation
    • Dependency Modeling
    • SA Policy Database Maintenance
  • Advanced hands-on REXX Programming experience with proven development of enterprise automation solutions.
  • Strong experience with IBM NetView, including automation tables, message automation, command lists, PIPEs, and event processing.
  • Extensive experience supporting and automating z/OS environments.

 

Technical Skills

  • Strong knowledge of:
    • z/OS
    • JCL
    • TSO/ISPF
    • SDSF
    • JES2/JES3
    • Parallel Sysplex
  • Experience automating and supporting middleware platforms including:
    • CICS
    • Db2
    • IMS
    • MQ Series
    • TCP/IP
  • Experience with Mainframe Operations, Monitoring, and Event Management.
  • Familiarity with high-availability and disaster recovery automation strategies.
  • Strong troubleshooting, analytical, and problem-solving capabilities.

 

Preferred Qualifications

  • Experience with CICS Automation including availability monitoring, restart, recovery, and health management.
  • Experience with IBM Workload Scheduler (IWS/TWS/ZWS) and workload automation processes.
  • Experience with z/OS UNIX System Services (USS/OMVS) and shell scripting.
  • Experience integrating mainframe automation with enterprise monitoring solutions.
  • Experience with:
    • IBM OMEGAMON
    • ServiceNow
    • Moogsoft
  • Experience supporting IBM zSeries, UNIX, and Windows infrastructure environments.
  • Knowledge of GDPS and disaster recovery automation.
  • Experience with SMP/E maintenance and z/OS system programming concepts.
  • Familiarity with Ansible, REST APIs, and Mainframe Modernization technologies.
KYYBA logo

About KYYBA

Sourced by ZipRecruiter

About Kyyba: Founded in 1998 and headquartered in Farmington Hills, MI, Kyyba has a global presence delivering high-quality resources and top-notch recruiting services, enabling businesses to effectively respond to organizational changes and technological advances. At Kyyba, the overall well-being of our employees and their families is important to us. We are proud of our work culture which embodies our core values; incorporating value, passion, excellence, empowerment, and happiness, creates a vibrant and productive atmosphere. We empower our employees with the resources, incentives, and flexibility that they need to support a healthy, balanced, and fulfilling career by providing many valuable benefits and a balanced compensation structure combined with career development.

Industry

Recruiting and staffing services

Company size

501 - 1,000 Employees

Headquarters location

Farmington Hills, MI, US

Year founded

1998

Social media

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