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Senior Mainframe Developer Jobs in Maryland (NOW HIRING)

TecTammina

Sr Java Position

Baltimore, MD

$57 - $72.50/hr

Experience with reverse engineering projects * Experience on Linux/Unix platforms * Experience with Mainframe technologies including CICS, COBOL, DB2 is a plus. * Experience working with Government ...

ActioNet

EOC Engineer- Junior Level

Suitland, MD · On-site

Knowledge of mainframe, mini, or client/server systems. * Experience assisting in system ... Ability to work with senior analysts and programmers to implement system specifications. * Strong ...

ActioNet

EOC Engineer- Junior Level

Suitland, MD · On-site

Knowledge of mainframe, mini, or client/server systems. * Experience assisting in system ... Ability to work with senior analysts and programmers to implement system specifications. * Strong ...

ActioNet

EOC Engineer- Junior Level

Suitland, MD · On-site

Knowledge of mainframe, mini, or client/server systems. * Experience assisting in system ... Ability to work with senior analysts and programmers to implement system specifications. * Strong ...

InstantServe LLC

Senior Business Analyst

Baltimore, MD · On-site

$91K - $118K/yr

Lead and facilitate data migration efforts from mainframe environment to a modern SaaS platform ... Collaborate with cross-functional teams, including developers, database administrators, data ...

Visionsoft International

SQL Developer/DBA

Bethesda, MD · On-site

$53.50 - $67/hr

Sr. SQL Developer/DBA 12+ Months Bethesda, MD - IN PERSON INTERVIEW 1-2 days Onsite We are seeking ... sources including mainframes, web services, FTP sites, ODBC and JDBC based data sources.

AAC

Tier 2 Deskside Technician

Fort George G Meade, MD · On-site

$22.50 - $28.50/hr

Provides Tier 2 desktop support to users for PC, server, mainframe applications, and hardware ... Has senior technical skills and understanding of the technical environment. May interact with ...

Marriott

Senior Director, Software Engineering

Bethesda, MD · On-site

$130K - $172K/yr

Experience transforming mainframe-based applications into modern open system technologies * Proven success in driving DevOps best practices and capabilities into development teams * Experience with ...

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Senior Mainframe Developer information

See Maryland salary details

$37

$55

$64

How much do senior mainframe developer jobs pay per hour?

As of Aug 10, 2026, the average hourly pay for senior mainframe developer in Maryland is $55.95, according to ZipRecruiter salary data. Most workers in this role earn between $52.50 and $61.11 per hour, depending on experience, location, and employer.

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 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 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.
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Senior Mainframe Developer jobs near you
Infographic showing various Senior Mainframe Developer job openings in Maryland as of August 2026, with employment types broken down into 74% Full Time, 12% Part Time, and 14% Contract. Highlights an 80% Physical, 6% Hybrid, and 14% Remote job distribution, with an average salary of $116,383 per year, or $56 per hour.

Sr Process Engineer - IT Production Support

System One

Columbia, MD • On-site

$53/hr

Contractor

Re-posted 2 days ago

Job description

Job Title: Sr Process Engineer – IT Production Support Location: Columbia, Maryland Type: Contract To Hire Compensation: $53/hr W-2 Work Model: Hybrid – onsite 2 to 3 times a month Hours: 40.0

Responsibilities

  • Monitor daily production processes across platforms including Mainframe (z/OS), CA7, and Jenkins.
  • Monitor applications using tools like Dynatrace and Jenkins for system health and performance.
  • Ensure successful execution of batch jobs and workflows; respond to alerts and system issues.
  • Diagnose, troubleshoot, and resolve job failures (abends), including restarting production and test jobs.
  • Provide Tier 1/L1 support for production applications and tenant systems.
  • Perform end-to-end incident lifecycle management including triage, analysis, resolution, and closure.
  • Conduct root cause analysis (RCA) and identify recurring incident patterns.
  • Document incidents, escalations, and resolutions in tracking tools (e.g., ServiceNow, SharePoint, Salesforce).
  • Collaborate with development, QA, and infrastructure teams for issue resolution.
  • Analyze and process EDI 837/835 healthcare claims and XML files.
  • Investigate claim errors (e.g., 999 rejections) and ensure data integrity.
  • Write and execute complex SQL queries across multi-database (Oracle) environments.
  • Develop and maintain SOPs, runbooks, and system documentation.
  • Document monitoring design, workflows, and support processes.
  • Contribute to continuous improvement initiatives and operational efficiency.

Requirements

  • BS in computer science, IT, or related field
  • 5–7+ years of experience in IT production support or operations
  • Experience with CA-7 job scheduling and batch processing
  • Strong analytical, troubleshooting, and problem-solving skills
  • Proficiency in SQL and Oracle databases
  • Experience with incident management processes and tools
  • Mainframe: COBOL, JCL, CA7
  • Scripting: Python, Groovy (Jenkins pipelines)
  • Monitoring Tools: Dynatrace, Jenkins, Prometheus
  • Databases: Oracle, SQL, Snowflakes
  • EDI: 837/835 transactions, XML processing
  • Tools: Jenkins, SharePoint, Salesforce or similar ticketing systems
  • BS degree required

Preferred Qualifications

  • Knowledge of Claims Adjudication processes (Healthcare domain)
  • Experience with EDI transaction standards and healthcare claims systems
  • Exposure to object-oriented programming languages
  • Experience working with Blue Cross Blue Shield (BCBS) or similar plans

Work Environment Fast-paced, production-critical IT environment Require on-call support or extended hours during production incidents.

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