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Mainframe Top Secret Security Administrator (Software Engineer III)
Mainframe Top Secret Security Administrator (Software Engineer III)Unicom Technologies INC • Chicago, Illinois, USA
Mainframe Top Secret Security Administrator (Software Engineer III)

Mainframe Top Secret Security Administrator (Software Engineer III)

Unicom Technologies INC • Chicago, Illinois, USA
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  • [job_card.full_time]
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Mainframe Top Secret Security Administrator (Software Engineer III)

Remote / Telework (Work From Home)

Duration

February 2 2026 - August 31 2026

Up to 600 total hours

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

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 :
  • JES
  • 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

    • Required Skills : Mainframe

    Key Skills

    Financial,Landscaping,Account Management,Event Planning,Db2

    Employment Type : Full Time

    Experience : years

    Vacancy : 1

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    Mainframe Top Secret Security Administrator Software Engineer III • Chicago, Illinois, USA

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