Software Engineer III

Job Title

Mainframe Top Secret Security Administrator (Software Engineer III)

Job Type

Contract | Full-Time

Category

Applications / Software Development

Duration

February 2, 2026 – August 31, 2026

Up to 600 total hours

Potential for renewal (up to three one-year extensions)

Work Location

Remote / Telework (Work From Home)

May require occasional after-hours or weekend support with prior approval

Role Overview

We are seeking a senior-level Mainframe Top Secret Security Administrator to support legacy systems and mainframe modernization initiatives. This role serves as a subject matter expert (SME) for mainframe security and z/OS administration, ensuring secure, compliant, and reliable operation of mission-critical systems.

The ideal candidate has deep hands-on experience with Top Secret Security (TSS), z/OS administration, certificate management, access controls, and mainframe operational support in highly regulated environments.

Key Responsibilities

• Serve as the SME for Mainframe Top Secret Security (TSS) to maintain system security, compliance, and audit readiness
• 
  
• Perform advanced z/OS systems administration, including configuration, upgrades, break/fix support, and ongoing maintenance
• 
  
• Manage user access controls, security profiles, and certificate renewals (TLS/SSL, RSA keys, SFTP, FTPS)
• 
  
• Provide technical support for system releases, upgrades, and infrastructure changes
• 
  
• Monitor system performance, diagnose issues, and conduct root cause analysis
• 
  
• Support mainframe production control, scheduled jobs, and batch processing
• 
  
• Provide end-user support for ISV tools such as BlueZone
• 
  
• Coordinate with network, customer support, and application teams to ensure stable daily operations
• 
  
• Support data integration and change data capture processes (IMS, VSAM) as needed
• 
  
• Contribute expertise to both legacy system operations and mainframe transformation initiatives
• 
  

Required Qualifications

• 8+ years of hands-on experience with Top Secret Security (TSS)
• 
  
• 5+ years of hands-on z/OS administration experience
• 
  
• 5+ years working with:
• 
  
• JES2
  • 
    
• z/OS UNIX System Services (OMVS)
  • 
    
• Storage Management Subsystem (SMS)
  • 
    
• 3+ years of experience with TLS configuration, including certificates, SSL, RSA keys, SFTP, and FTPS
• 
  
• Strong understanding of mainframe security, compliance, auditing, and risk mitigation
• 
  

Preferred Qualifications

• Experience with performance monitoring and initial performance analysis
• 
  
• Experience with Informatica Power Exchange Administration
• 
  
• Experience with REXX scripting
• 
  

Technical Knowledge (Preferred / Working Knowledge)

• z/OS Operations
• 
  
• z/OS Networking (VTAM, TCP/IP)
• 
  
• Automated job scheduling tools (e.g., JOBTRAC)
• 
  
• Terminal emulation tools (BlueZone)
• 
  
• VTAM session management tools
• 
  
• SMP/E
• 
  
• RMF, SMF, WLM
• 
  
• JCL
• 
  
• GRS
• 
  
• VSAM
• 
  
• TSO
• 
  

Additional Requirements

• Ability to access secure environments via remote access tools (e.g., GoToMyPC)
  
• 
  
• May be required to work evenings, weekends, or holidays with prior approval