Sr Mainframe Security Administration
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Job Location:
Austin, TX - USA
Monthly Salary:
Not Disclosed
Posted on:
15 hours ago
Vacancies:
1 Vacancy
Job Summary
We have built our reputation on partnering with our clients and candidates to achieve the desired results. Our recruiting professionals have extensive experience matching the right candidate to the right client for the right position. We provide the best opportunities to the most talented candidates in a multitude of industries.
MMC is a privately owned business with corporate headquarters in Irving Texas. With 2000 employees working in 40 states MMC is able to support all United States locations and some international locations.
We appreciate your interest in reviewing this particular position and we encourage you to visit our website where you can always search and apply for opportunities at
Benefits with MMC Group
MMC offers health insurance plans for our active candidates on assignment including:
- Medical dental and vision coverage
- Life and disability insurance
- Additional voluntary benefits
Join MMC and enjoy the support of a team that values your well-being both on and off the job.
MMC strives to ensure all job posting confirm details of the position the rate of pay and acknowledge medical benefits are offered.
Get started on your career journey today! Apply to become a part of the MMC Team!
We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race color religion sex national origin disability status protected veteran status or any other characteristic protected by compliance with federal law all persons hired will be required to verify identity and eligibility to work in the United States and to complete the required employment eligibility verification document form upon hire.
Software Engineer 3 - Sr Mainframe Security Administration (Top Secret)
Work Location: Remote Work From Home
Schedule: Monday through Friday 8:00 AM - 5:00 PM excluding State holidays
Engagement Term: February 2 2026 through August 31 2026
Position Overview
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.
Key Responsibilities
- 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
Required Skills and Experience
Minimum 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
Preferred Skills
- 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
Additional Technical Knowledge (Preferred)
Working knowledge of the following mainframe technologies and tools is strongly preferred:
- z/OS Operations and Administration
- z/OS Networking including VTAM and TCP/IP
- Mainframe job scheduling and automation tools including JOBTRAC
- Terminal emulation software
- VTAM session management tools
- SMP/E RMF SMF WLM
- JCL GRS VSAM TSO
Role Classification Clarification
Although classified under a Software Engineer 3 (Legacy Level 3) designation this role is not application development-focused. It is a mainframe security and systems administration role centered on operational stability compliance and infrastructure support.
Ideal Candidate Profile
This role is best suited for professionals with deep mainframe operations and security backgrounds who thrive in highly regulated environments and enjoy supporting both legacy platforms and transformation efforts.
Mainframe Security Administrator z/OS Security Administrator Mainframe Systems Administrator (Security) Mainframe Security SME Mainframe Operations Security Engineer Legacy Systems Security Administrator
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Required Experience:
Senior IC
Key Skills
- Clerical
- Diploma
- Business Administration
- CNC
- Ethernet
About Company
MMC provides professional services and workforce management services and solutions (both technical and non-technical) to public and private companies in addition to governmental organizations (Federal, State and Local) in the United States. Our Partners include major systems integrato ... View more
