Sr. Mainframe Developer

Omm Inc.; Woodlawn (KY); Presencial; USD 90.000 - 130.000; Tempo integral

Resumo da vaga

Omm IT Solutions in Woodlawn, MD is seeking a senior mainframe developer to design, enhance, and maintain COBOL-based applications on IBM z/OS. You will work on CICS, IDMS, and DB2 components, using Endevor for CM, and batch processing via JCL.

The role requires on-site presence and the ability to obtain a US Public Trust clearance. Candidates should have strong analytical, communication, and requirements-elicitation skills, with extensive experience in legacy systems and modernizing approaches.

Qualificações

• Master's and 5+ years of experience, Bachelor's and 7+ years of experience or 13+ years in lieu of a degree.
• Eight to ten years of experience developing legacy applications on IBM z/OS.
• Hands-on experience developing, debugging, and maintaining COBOL applications that use CICS, DB2, IDMS, copybooks, and CICS maps.
• Hands-on experience with CICS applications, screen development and abends, including interactions between COBOL programs and BMS maps that define the user interface.
• Experience using Endevor or a comparable mainframe software configuration management system to manage legacy element workflows.
• Hands-on experience with ISPF, TSO, JES, z/OS, and mainframe utilities.
• Hands-on experience creating and modifying JCL for job execution, supporting batch jobs in day-to-day operations.
• Experience with Control-M or similar mainframe job-scheduling tool(s).
• Strong requirements elicitation, analytical, technical writing, and communication skills, including the ability to document project requirements and analysis.
• Strong attention to detail and a demonstrated ability to complete repetitive, integration/production-oriented tasks accurately and on time.
• Ability to research problems independently and develop effective solutions.

Responsabilidades

• Develop and maintain COBOL, REXX, JCL, CLIST, CICS, IDMS, and DB2 code and database structures in accordance with client standards and software engineering best practices.
• Use mainframe utilities and diagnostic tools, including SYNCSORT, File-AID, SuperC, Abend-AID, SPUFI, QMF, Xpediter, and InterTest.
• Perform unit testing and validate results against expected outcomes.
• Assess how database schema changes affect existing software components.
• Diagnose and resolve application defects involving COBOL, CICS configurations, IDMS, DB2, business logic, and databases.
• Design, develop, test, debug, and implement modernized solutions for legacy applications using appropriate technologies and engineering practices.
• Create, update, and support JCL for reliable and efficient batch processing.
• Evaluate the effects of new operating systems and COBOL versions on the existing legacy application inventory.
• Collaborate with internal teams, client counterparts, and vendor teams. Provide technical guidance and help stakeholders achieve project and business objectives.
• Communicate status, risks, and technical information clearly to Leidos leads, client counterparts, teams, and vendors at the appropriate level of detail.
• Perform other duties as assigned or directed.

Conhecimentos

Requirements elicitation

Analytical thinking

Communication

Formação

Master's degree + 5+ years, Bachelor's + 7+ years or 13+ years in lieu

Ferramentas

COBOL

CICS

JCL

IDMS

DB2

Endevor

ISPF

TSO

JES

z/OS

SYNCSORT

File-AID

SuperC

Abend-AID

SPUFI

QMF

Xpediter

InterTest

Descrição da vaga

Permanent W-2 Employee / Corp2Corp Contractor | Omm IT Solutions | United States

Posted On 11/10/2026

Job Information

Start Date 11/12/2026 12:00 AM

Compensation Negotiable

IT Services

Work Authorization Authorized to work in USA

Background Check/Public Trust Clearance US Public Trust Clearance

Job Opening ID Omm3032J

State/Province Maryland

City Woodlawn

21207

Job Description

PLEASE NOTE:

• IT IS 100% ONSITE POSITION.
• Selected candidate must be willing to work on-site in Woodlawn, MD 5 days a week.
• Selected candidate must be able to obtain and maintain a public trust clearance.

KEY REQUIRED SKILLS:

Mainframe development, COBOL, CICS, JCL, IDMS, and DB2

POSITION DESCRIPTION:

• Develop and maintain COBOL, REXX, JCL, CLIST, CICS, IDMS, and DB2 code and database structures in accordance with client standards and software engineering best practices.
• Use mainframe utilities and diagnostic tools, including SYNCSORT, File-AID, SuperC, Abend-AID, SPUFI, QMF, Xpediter, and InterTest.
• Perform unit testing and validate results against expected outcomes.
• Assess how database schema changes affect existing software components.
• Diagnose and resolve application defects involving COBOL, CICS configurations, IDMS, DB2, business logic, and databases.
• Design, develop, test, debug, and implement modernized solutions for legacy applications using appropriate technologies and engineering practices.
• Create, update, and support JCL for reliable and efficient batch processing.
• Evaluate the effects of new operating systems and COBOL versions on the existing legacy application inventory.
• Collaborate with internal teams, client counterparts, and vendor teams. Provide technical guidance and help stakeholders achieve project and business objectives.
• Communicate status, risks, and technical information clearly to Leidos leads, client counterparts, teams, and vendors at the appropriate level of detail.
• Perform other duties as assigned or directed.

Requirements

BASIC QUALIFICATIONS:

• Master's and 5+ years of experience, Bachelor's and 7+ years of experience or 13+ years in lieu of a degree
• Eight to ten years of experience developing legacy applications on IBM z/OS.

REQUIRED SKILLS:

• Hands-on experience developing, debugging, and maintaining COBOL applications that use CICS, DB2, IDMS, copybooks, and CICS maps.
• Hands-on experience with CICS applications, screen development and abends, including interactions between COBOL programs and BMS maps that define the user interface.
• Experience using Endevor or a comparable mainframe software configuration management system to manage legacy element workflows.
• Hands-on experience with ISPF, TSO, JES, z/OS, and mainframe utilities.
• Hands-on experience creating and modifying JCL for job execution, supporting batch jobs in day-to-day operations.
• Experience with Control-M or similar mainframe job-scheduling tool(s).
• Strong requirements elicitation, analytical, technical writing, and communication skills, including the ability to document project requirements and analysis.
• Strong attention to detail and a demonstrated ability to complete repetitive, integration/production-oriented tasks accurately and on time.
• Ability to research problems independently and develop effective solutions.

DESIRED SKILLS:

• Hands-on experience of the legacy technologies listed in job specification.
• Good understanding in SDLC specially in legacy development environment.
• Experience with modern development tools, software, AI tools, and methodologies.
• Familiarity with Agile frameworks, Agile terminology and Agile practices.
• Relevant certification, such as IBM Mainframe Developer Professional, or Interskill - IBM Mainframe Application Programmer, or IBM Mainframe Application Programmer – COBOL and IBM Enterprise COBOL for z/OS Programming

Education/Work Experience

Master's and 5+ years of experience, Bachelor's and 7+ years of experience or 13+ years in lieu of a degree

Eight to ten years of experience developing legacy applications on IBM z/OS.