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Mainframe Security Engineer

Ensono

Company : Ensono

Location : Los Angeles, CA

Posted Date : 15 October 2025

Job Type : Full Time

Category : Industrial Engineering

Occupation : Security Engineer

Job Details

Mainframe Security EngineerRemote - United StatesJR

About the role and what you'll be doing:

Job Description Summary:

This is a Mainframe Security Administration position, working on IBM z/OS operating systems. Experience using TSO, JCL, ISPF, JES2, and IBM Utilities will be required.

A passing of a Federal Background Check is required for this position.

  • Hands-on security administration experience with RACF, ACF2 and Top-Secret logon ID's, datasets, and resource rules.

  • Top Secret security administration experience required for this position, ACF2 and RACF experience desired.

  • Provision user access in response to tickets opened in Service Now within defined SLAs.

  • Monitor system security policy and violations/incidents.

  • Perform and review daily, weekly, and monthly audit reports.

  • Liaison with business areas and other technical support areas.

  • Provide customer support by preparing ad hoc reports and giving presentations.

  • Monitors the environment for adherence to security standards.

  • Must be available 24 x 7. On-call support will be required.

  • Experience using Vanguard and/or IBM zSecure security products.

  • iSeries security knowledge a plus.

Technical Skills:

  • Excellent TSO, JCL, IBM UTILITIES, JES2, and ISPF a must.

  • Experience with REXX or any programming language is desired.

  • Experience with CICS security administration preferred.

  • Experience using Vanguard and/or IBM zSecure security products is desired.

  • Experience with IAM, MFA and PAM is desired.

General Knowledge:

  • z/OS experience is highly desired

  • PC Skills (Microsoft Outlook, Word, Excel, PowerPoint)

Personal Skills:

  • Strong written and verbal communication skills.

  • Strong organisational skills with the ability to manage multiple concurrent project deliverables and the ability to work as a global team.

  • Ability to work on own initiatives.

  • Strong analytical skills and problem-solving skills

  • Must be an excellent team player with the ability to work independently in a fast-paced environment

  • Self-starter, detail-oriented and ability to multitask

  • Excellent Communication skills required

  • Good written skills are required

Education:

  • CISSP, CISA, CISM or ITIL Certification a plus

  • Bachelor's or master's degree preferred

  • Other mainframe security products a plus

Why Ensono?

Ensono is a place to make better happen - for our clients and for your career. You can do great things through innovation or collaboration, by learning or volunteering, or to promote diversity and inclusion. You can do great things for your own health or for a healthier planet. Whatever it means to you to do great things we want Ensono to be the place you can do it.

We are a client-facing business, but we do encourage clients to allow us to work remotely most of the time so if you are not required to be on a client site, you can choose to work from home or in our Ensono offices.

Some of our benefits include:

  • Unlimited Paid Days Off

  • Three health plan options through Blue Cross Blue Shield

  • 401k with company match

  • Eligibility for dental, vision, short and long-term disability, life and AD&D coverage, and flexible spending accounts

  • Paid Maternity Leave, Paternity Leave, and Sabbatical Leave

  • Education Reimbursement, Student Loan Assistance or 529 College Funding

  • Enhanced fertility coverage

  • Wellness program

  • Depending on location, ability to take Flexible work schedule

  • Advantage of fitness centers

As of the date of this posting, a good faith estimate of the current pay scale for this role is $75,000 to $123,000 annually based on a full-time schedule. Please note that placement in the range may vary based on numerous factors including but not limited to skills, experience, internal equity, and business needs. In addition to base salary, other compensation programs, depending on eligibility, include an annual bonus plan based on company and individual performance and an equity grant under our Associate Equity Appreciation Program.

Ensono is an Equal Opportunity/Affirmative Action employer. We are committed to providing equal employment to our Associates and building a diverse and inclusive workforce. All qualified applicants will be considered without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, protected veteran status, disability, or other legally protected basis, in accordance with applicable law.

Pay transparency nondiscrimination statement/posting OFCCP's pay transparency policy can be found onOFCCP's website ( .

If you need accommodation at any point during the application or interview process, please let your recruiter know or email .

JR

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