> Markdown version of [/jobs/ext/4545031-sr-mainframe-developer](https://www.wearedevelopers.com/jobs/ext/4545031-sr-mainframe-developer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Sr. Mainframe Developer - **Company:** J.S. CONSULTING PARTNERS, INC. - **Location:** Woodlawn, MD, United States - **Experience:** Expert - **Contract:** Temporary contract - **Skills:** Agile Methodology, Business Logic, Software Applications, Unit Testing, Batch Processing, Customer Information Control System (CICS), CLIST, COBOL (Programming Language), Computer Programming, Databases, IBM DB2, Relational Databases, Database Schema, Database Storage Structures, Software Debugging, DevOps, Middleware, Endevor, Human-Computer Interaction, Web Browsers, Job Control Language (JCL), IBM Mainframe, Rexx (Programming Language), Interactive System Productivity Facility (ISPF), Job Scheduling, PostgreSQL, Mainframes, Microsoft Visual Studio, Standard Sql, SAS (Software), Software Configuration Management, Software Construction, Software Engineering, SonarQube, PL-SQL, Z/OS, Usage Analysis, Syncsort, File-aid, Git, Information Technology, Maintaining Code, Bitbucket, Os/390 Operating System, Software Coding, Docker, Jenkins, Control M - **Published:** November 3, 2026 - **Apply:** https://www.thejobnetwork.com/job/c12febe3-b154-4b75-a4eb-c623c171221d/sr-mainframe-developer ## About the Role * 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., * 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. ## Description 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., * 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.?