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Sr Mainframe Security Administration

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MMC Group LP

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Location:
United States , Austin

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Category:
IT - Administration

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Contract Type:
Not provided

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Salary:

Not provided
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Job Description:

This position supports enterprise legacy systems as a Senior-level Mainframe Top Secret Security Administrator, classified under a Legacy Level 3 Software Engineer framework. The role is operational and infrastructure-focused, emphasizing mainframe security, systems administration, compliance, and transformation support rather than application development. The individual will serve as a subject-matter expert for mainframe security administration, supporting both ongoing legacy operations and mainframe modernization initiatives.

Job Responsibility:

  • Serve as the subject-matter expert for Mainframe Top Secret Security (TSS) administration, ensuring data security and regulatory compliance
  • Perform senior-level systems administration for z/OS environments, supporting agency mainframe applications and infrastructure
  • Execute day-to-day system administration activities, including configuration, break/fix support, and base user account provisioning
  • Manage certificate renewals, TLS configurations, and access control within mainframe environments
  • Conduct routine security administration, performance monitoring, system monitoring, and maintenance activities
  • Diagnose platform and software issues, perform root cause analysis, and implement corrective actions
  • Support mainframe production control processes, job scheduling, and batch operations
  • Coordinate with Network Administration, Customer Support, and Applications Development and Support teams to ensure stable daily operations
  • Provide end-user support for assigned Independent Software Vendor products, including terminal emulation tools
  • Support data entry and control processes and oversee operational coordination within a consolidated data center environment
  • Contribute expertise to both Legacy Systems support and Mainframe Transformation initiatives

Requirements:

  • Eight or more years of hands-on experience with Top Secret Security (TSS) administration
  • Five or more years of hands-on experience with z/OS systems administration
  • Five or more years of experience with JES2, z/OS UNIX System Services (OMVS), and Storage Management Subsystem (SMS)
  • Three or more years of experience with TLS configuration, including certificates, SSL, RSA keys, SFTP, and FTPS

Nice to have:

  • Experience with REXX scripting
  • Experience with performance monitoring and initial performance analysis
  • Experience supporting Informatica Power Exchange Administration for Change Data Capture using IMS and VSAM data sources
  • Working knowledge of z/OS Operations and Administration
  • Working knowledge of z/OS Networking, including VTAM and TCP/IP
  • Working knowledge of Mainframe job scheduling and automation tools, including JOBTRAC
  • Working knowledge of Terminal emulation software
  • Working knowledge of VTAM session management tools
  • Working knowledge of SMP/E, RMF, SMF, WLM
  • Working knowledge of JCL, GRS, VSAM, TSO
What we offer:
  • Medical, dental, and vision coverage
  • Life and disability insurance
  • Additional voluntary benefits

Additional Information:

Job Posted:
January 15, 2026

Employment Type:
Fulltime
Work Type:
Remote work
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