Sign upLog in

Senior Mainframe Developer (COBOL)

System One

Reston, VA(remote)

Apply
JOB DETAILS
SALARY
$83.33–$83.33 Per Hour
SKILLS
Agile Programming Methodologies, Amazon Web Services (AWS), Analysis Skills, Best Practices, Business Analysis, Change Management, Cloud Computing, Cobol Programming Language, Code Reviews, Communication Skills, Computer Science, Continuous Deployment/Delivery, Continuous Integration, Cross-Functional, Debugging Skills, DevOps, Git, Healthcare, IBM CICS (Customer Information Control System), IBM TSO/ISPF, Identify Issues, JCL (Job Control Language), Java, Large-Scale Systems, Mainframe Computer, Maintain Compliance, Mentoring, Outsourcing, Performance Management, Problem Solving Skills, Production Support, Production Systems, Quality Metrics, REST (Representational State Transfer), Requirements Management, Scalable System Development, Scrum Project Management and Software Development, Service Delivery, Service-Oriented Architecture (fka Distributed Object Architecture), Software Administration, Test Plan/Schedule, Web Services, Willing to Travel
LOCATION
Reston, VA(remote)
POSTED
2 days ago

Senior Mainframe Developer (COBOL)
Location: Primarily Remote
Onsite Expectations: Monthly travel to Reston, VA for PI Planning
Compensation: $83/HR
Employment Type: W2 only

About the Role
We’re looking for a Senior Mainframe COBOL Developer to support and enhance large-scale enterprise systems. This role is ideal for someone who thrives in a mainframe environment, enjoys solving complex problems, and is open to evolving technologies.
You’ll play a key role in maintaining critical applications, supporting high-volume systems, and contributing to modernization efforts where applicable.
Work Model
  • Primarily remote
  • Must live in the DMV area or nearby states (WV, DE, PA) OR be willing to relocate
  • Ability to travel to Reston, VA approximately once per month for PI Planning
What You’ll Do
  • Design, develop, test, and maintain mainframe applications using COBOL
  • Work across core mainframe tools including CICS, JCL, TSO/ISPF, and related utilities
  • Analyze business and technical requirements to develop scalable solutions
  • Support production systems, troubleshoot issues, and resolve critical defects
  • Perform code reviews, testing, and ensure adherence to quality standards
  • Collaborate with cross-functional teams to deliver reliable, high-performing systems
  • Participate in Agile ceremonies and PI Planning sessions
  • Identify opportunities to improve performance, stability, and maintainability
  • Mentor junior developers and contribute to team best practices
What You Bring
Required Experience
  • 5–8 years of mainframe development experience
  • Strong expertise in:
    • COBOL
    • CICS
    • JCL
    • TSO/ISPF
    • Mainframe change management tools (e.g., ChangeMan, Topaz)
  • Experience supporting large-scale enterprise systems
  • Ability to analyze, debug, and work with existing legacy codebases
  • Experience in Agile/Scrum environments
  • Strong problem-solving and communication skills
  • Ability to work independently and as part of a distributed team
? Candidates with prior mainframe experience (even if from 1–3 years ago) are encouraged to apply if they’re confident returning to hands-on COBOL work
Nice to Have
  • Exposure to Java or modern integration technologies
  • Experience with web services (REST/SOA)
  • Familiarity with AWS or cloud concepts
  • Experience with DevOps / CI-CD pipelines
  • Healthcare domain experience (especially working with enrollment or benefits data)
  • Experience with Git / Bitbucket
Education
  • Bachelor’s degree in Computer Science, IT, or related field
  • OR equivalent experience (additional 4 years of relevant work)


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-1
#LI-AJ1



Ref: #851-Rockville-S1


About the Company

S

System One

Every day, System One focuses on services and solutions that require a high degree of specialization, in-demand technical skills, and large-scale operational expertise. We are essential partners to those on the front lines of our nation’s most critical infrastructure, technology, and life sciences initiatives. 

Founded more than 40 years ago as a staffing partner to the engineering industry, today System One is a diversified organization operating in over 50 locations and putting more than 9,000 people to work in the United States, Canada, and the United Kingdom.

COMPANY SIZE
2,500 to 4,999 employees
INDUSTRY
Staffing/Employment Agencies
WEBSITE
https://systemone.com