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Mainframe Developer

Leidos

$85,150 - $153,925
Jul 31, 2025
Baltimore, MD, US
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Leidos is seeking a Mainframe Developer to support the Social Security Administration's (SSA) Digital Modernization Strategy by building next-generation enterprise APIs and modern responsive user interfaces.

Requirements

  • 7+ years of combined experience developing COBOL batch and online programs using CICS, JES, JCL, CLIST, maps, and PROC
  • 2+ years of experience using Endevor
  • 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 as a developer

Responsibilities

  • 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

Other

  • Selected candidate must be willing to work on-site in Woodlawn, MD 5 days a week.
  • Must be able to obtain and maintain a Public Trust. Contract requirement.
  • Excellent communication and written skills
  • Are you an US citizen, US resident, or Visa candidate and think you might fit?