200 mainframe systems engineer senior jobs found

Refine Search
Refine Search
mainframe systems engineer senior
Back to job list
Back

Mainframe Systems Engineer, Senior

Imagine One
Apply Now
Charleston, SC, USA
Sep 21, 2026

Imagine One Technology & Management, Ltd. is seeking a Senior Mainframe Systems Engineer, contingent upon award of the associated work. This position will be based in Charleston, SC.

The Senior Mainframe Systems Engineer is responsible for analyzing, planning, designing, and documenting application installation and operations within z/OS-based mainframe Business Information Systems (BIS). This role leads infrastructure planning, application support, infrastructure analysis and assessment, and infrastructure testing and troubleshooting activities supporting enterprise Marine Corps pay and personnel systems. 

Key Responsibilities:

  • Lead engineering and operational support of z/OS-based mainframe environments.
  • Analyze, plan, design, and document application installations and infrastructure changes.
  • Integrate COBOL/CICS applications into z/OS environments.
  • Perform infrastructure analysis, assessment, testing, and troubleshooting.
  • Support performance tuning and security configuration analysis.
  • Provide technical input to architecture documentation, SIAs, MOAs, and RFAs.
  • Support Risk Management Framework (RMF) / MCAAP-aligned engineering activities.
  • Develop operational and system-level architecture views.
  • Support production control, release management, and mainframe engineering activities as required.

Desired Experience: 

  • 10+ years engineering and operating z/OS-based mainframe Business Information Systems.
  • 5+ years integrating COBOL/CICS applications into z/OS environments.
  • 2+ years engineering systems within MCAAP or other Risk Management Framework implementations.
  • Experience in concept exploration, requirements definition, systems design, integration testing, and evaluation within complex enterprise environments.
  • Experience developing operational and system-level architecture views.

Minimum Certifications: 

  • IAT Level II baseline certification required.

Security Requirements:  

  • U.S. Citizen.
  • Active Secret clearance required.

Imagine One offers a full package of benefits and competitive salary, excellent group medical, vision, and dental programs. 401K savings plan; $4K annual tuition reimbursement ($5K if pursuing master’s degree); employee training, development, and education programs; profit sharing; advancement opportunities; and much more!

ISO 9001:2015, ISO 20000-1:2018, ISO 27001:2022
CMMI Development and Services - Maturity Level 3
CMMC Level 2 (C3PAO)
An Employee-Owned Business

EEO/Vets/Disabled

Job ID

578981|loc1

Security Clearance

SECRET
About Imagine One
Go to job list