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Mainframe Applications Engineer

System OneGreenbelt, MD🇺🇸United StatesPosted 19 Aug 2026

Quick Overview

Work Type
On Site
Level
Mid Senior

Job Description

Job Title: Mainframe Applications Engineer
Location: Greenbelt, Maryland
Type: Contract-to-Hire
Work Model: Onsite
Hours: 40.0
Security Clearance: Active IRS MBI Clearance
Contact:

RESPONSIBILITIES

  • Develop and maintain Mainframe applications with expertise in IMF tax processing and Masterfile processing
  • Utilize TDOL domain expertise to support application development and modernization efforts
  • Perform programming and operational maintenance using ALC, JCL, COBOL, C, C++, Java, and CICS
  • Lead testing and transmittals, including test planning, execution, and documentation using ALC, JCL, COBOL, C/C++, DB2, and Java
  • Participate in SDLC activities, including requirements gathering, documentation, and requirements analysis using OneSDLC and ELC/OneSDLC artifacts
  • Provide troubleshooting and support for complex Mainframe applications in an Agile environment

REQUIREMENTS
  • 10+ years of experience with IMF tax processing and Masterfile processing
  • 10+ years of expertise in ALC, JCL, COBOL, C, C++, Java development and O&M
  • Extensive experience with JCL, COBOL, C/C++, Java, CICS, DB2, ALC programming, and modernization support
  • 5+ years of experience with OpenText Exstream (or equivalent) including DM/Live Editor and scripting
  • Strong knowledge of XML/XSLT, Jira, and Agile methodologies
  • Excellent troubleshooting skills and ability to work independently in complex environments

System One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. We help clients get work done more efficiently and economically, without compromising quality. System One not only serves as a valued partner for our clients, but we offer eligible employees health and welfare benefits coverage options including medical, dental, vision, spending accounts, life insurance, voluntary plans, as well as participation in a 401(k) plan.

System One is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, age, national origin, disability, family care or medical leave status, genetic information, veteran status, marital status, or any other characteristic protected by applicable federal, state, or local law.

#M-
#LI-
Ref: #851-Rockville-S1

Skills

Agile
Jira

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