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Senior Mainframe Developer Jobs in Fallston, MD (NOW HIRING)

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 ...

Tata Consultancy Services

Sr. Engineer

Owings Mills, MD · On-site

$99K - $136K/yr

... Sr. Engineer to provide production support in the financial services domain. The role involves ... mainframe job Scheduler. • Troubleshoot and resolve application failures, batch job issues ...

TecTammina

Sr. WebFOCUS developer

Baltimore, MD

My Client is in need of a WebFOCUS developer with Version 8.x and Version 7.x experience The ... Knowledge of both client/server and mainframe-based systems. Strong background in coding and ...

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 ...

GTT, LLC

Senior AWS Engineer

Owings Mills, MD · Hybrid

$70 - $80/hr

Senior AWS Engineer Location: Owings Mills, MD Onsite Flexibility: Hybrid Contract Details ... mainframe and client/server applications, and major enhancement of existing systems. Key ...

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 ...

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All JobsSenior Mainframe Developer JobsSenior Mainframe Developer Jobs in Fallston, MD

Senior Mainframe Developer information

See Fallston, MD salary details

$37

$56

$64

How much do senior mainframe developer jobs pay per hour?

As of Jun 26, 2026, the average hourly pay for senior mainframe developer in Fallston, MD is $56.25, according to ZipRecruiter salary data. Most workers in this role earn between $52.79 and $61.44 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 are Senior Mainframe Developers?

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 cities near Fallston, MD are hiring for Senior Mainframe Developer jobs? Cities near Fallston, MD with the most Senior Mainframe Developer job openings:
Senior Mainframe Developer jobs near you
Infographic showing various Senior Mainframe Developer job openings in Fallston, MD as of June 2026, with employment types broken down into 56% Full Time, 34% Part Time, 3% Temporary, and 7% Contract. Highlights an 85% Physical, 5% Hybrid, and 10% Remote job distribution, with an average salary of $117,007 per year, or $56.3 per hour.
Sr. Mainframe Developer

Sr. Mainframe Developer

JS Consulting

Woodlawn, MD • On-site

$51 - $65.50/hr

Contractor

Posted 10 days ago

Job description

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 and maintaining JCL and COBOL, Dialog Manager, Endevor, z/OS, CLIS, JCL, and DB2 for application software systems.

Position Description:

  • Responsible for conforming to customer standards and requirements and will be involved in creating and maintaining code and database structures such as COBOL, Restructured Extended Executor (REXX), Job Control Language (JCL), CLIST, DB2, as well as numerous mainframe utility tools such as SYNCSORT, File-AID/Related Data XPERT (RDX), etc. Responsible for unit testing and validation against desired outcomes. The resource is expected to function as part of a team, maintain a high level of collaboration with SSA of customers, and must demonstrate excellent communication skills to ensure success.
  • Develop JCL and software code using customer defined standards and software engineering best practices
  • Evaluate impacts of database schema changes on existing software components
  • Investigate and repair application defects related to business logic, middleware, or database (DB2).
  • Design, develop, test, debug, and implement next-generation COBOL programs using software engineering, best practices and latest technologies
  • Create and update JCL for efficient batch processing
  • Evaluate the impact of new operating systems, or versions of COBOL and Endevor on programs.
  • Collaborate with internal teams and external vendors, offering technical advice and influencing key stakeholders to achieve strategic objectives and enhance Leidos business outcomes.
  • Investigate and repair application defects regardless of component: COBOL, business logic, CICS configurations, middleware, or database (PL/SQL and Data Modeling).
  • Brief management, customer, team, or vendors using written or oral skills at appropriate technical level for audience
  • All other duties as assigned or directed.?

Requirements  

  • Bachelor's Degree in Computer Science, Mathematics, Engineering or a related field.
  • Masters or Doctorate degree may substitute for required experience
  • 10+ years of experience with Mainframe.
  • Must be able to obtain and maintain a Public Trust. Contract requirement.

FACTORS TO HELP YOU SHINE (Required Skills)

These skills will help you succeed in this position:

  • Experience developing and maintaining COBOL applications including working with structures, copybooks, and CICS maps
  • Experience developing applications for use on IBM z/OS.
  • Experience debugging COBOL Programs, CLIST, PROC, COBOL error tracing, and using Visual Studio COBOL viewer.
  • Basic experience with CICS programs, including how COBOL programs interact with BMS maps that define to user interface.
  • Experience using Endevor with TADZ for reporting and analysis such as browsing, scanning elements, measuring usage statistics.
  • Working knowledge / experience with ISPF, TSO, JES, and Job Control Language (JCL).
  • Experience developing and modifying JCL for job execution and batch operations
  • Hands-on experience with batch and online processing.
  • Excellent communication and written skills
  • Experience with mainframe-based software configuration management systems such as Endevor.
  • Experience with Control-M or other mainframe-based job scheduling tools.
  • Detail oriented and committed to consistently completing repetitive production-like tasks on-time and error-free.
  • Ability to independently research problems and provide solutions.

HOW TO STAND OUT FROM THE CROWD (Desired Skills)

Showcase your knowledge of modern development through the following experience or skills:

  • Working knowledge of SAS and REXX.
  • Experience with Mainframe Assembler development.
  • Certification such as IBM Mainframe Developer Professional, Interskill - Mainframe Application Programmer - COBOL and IBM Enterprise COBOL for z/OS Programming
  • Solid knowledge of relational databases (PostgreSQL, DB2), and SQL
  • Experience with modern development software, tools, and methodologies.
  • Experience working on Agile projects and understanding Agile terminology.
  • Experience with DevOps and toolset (Git/Bitbucket, Docker, Jenkins, SonarQube)?

Education           

  • Bachelor's Degree with 7+ years of experience.
  • Must be able to obtain and maintain a Public Trust. Contract requirement.

Respectfully,