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Freelance Mainframe Security Engineer Jobs (NOW HIRING)

TEKsystems

Mainframe Engineer

Chicago, IL · Remote

$10 - $70/hr

... security platforms, storage, networking, virtualization, and performance management in highly ... The engineer will play a critical role in proofing the mainframe platform, ensuring technical ...

Merican

Mainframe Administrator

San Antonio, TX · On-site

Client is not looking for a Mainframe developer or Tester. The resource is expected to have ... Expert knowledge in Mainframe Security & Compliance, security protocols (e.g., Top Secret/TSS), and ...

Palnar

Mainframe, Network Systems Programmer

$56.25 - $71.75/hr

Mainframe Network Engineering will be supporting a firmwide initiative to enable encryption for all ... Partner with mainframe security team to identify and assist with certificates required for ...

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Freelance Mainframe Security Engineer information

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$23K

$139.6K

$174.5K

How much do freelance mainframe security engineer jobs pay per year?

As of Jul 25, 2026, the average yearly pay for freelance mainframe security engineer in the United States is $139,599.00, according to ZipRecruiter salary data. Most workers in this role earn between $116,000.00 and $160,000.00 per year, depending on experience, location, and employer.

What is the difference between Freelance Mainframe Security Engineer vs Mainframe Security Analyst?

AspectFreelance Mainframe Security EngineerMainframe Security Analyst
CredentialsCertifications like CISSP, CISA, or vendor-specific security certificationsSimilar certifications, often including CISSP, CISA, or vendor-specific security credentials
Work EnvironmentIndependent, project-based, remote or on-site consultingFull-time, in-house or remote roles within organizations
Employer & Industry UsageConsulting firms, freelance platforms, or direct client contracts in finance, government, or techFinancial institutions, government agencies, or large corporations with dedicated security teams

While both roles focus on securing mainframe environments, a Freelance Mainframe Security Engineer works independently on various projects, offering specialized expertise. In contrast, a Mainframe Security Analyst is typically employed full-time within an organization, managing ongoing security operations. The certifications and skills overlap significantly, but the work setting and employment structure differ.

More about Freelance Mainframe Security Engineer jobs
What cities are hiring for Freelance Mainframe Security Engineer jobs? Cities with the most Freelance Mainframe Security Engineer job openings:
What are the most commonly searched types of Mainframe Security Engineer jobs? The most popular types of Mainframe Security Engineer jobs are:
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Freelance Mainframe Security Engineer jobs near you
Infographic showing various Freelance Mainframe Security Engineer job openings in the United States as of July 2026, with employment types broken down into 96% Full Time, 1% Part Time, and 3% Contract. Highlights an 87% Physical, 5% Hybrid, and 8% Remote job distribution, with an average salary of $139,599 per year, or $67.1 per hour.
z/OS USS Security Engineer

z/OS USS Security Engineer

Prophecy Consulting

Alpharetta, GA • On-site

Other

This job post has expired today. Applications are no longer accepted.

Job description

About the job: 

Enterprise Technology & Services (ETS) delivers shared technology services that support all business applications and over 3,000 production systems globally. ETS enables the full software development lifecycle-from development and testing to release engineering, monitoring, and operational support.

The Enterprise Z Security team is responsible for engineering and operating IBM Z mainframe authentication and authorization services. This position will be member of the Enterprise Z Security team and responsible for design, implementation and monitoring security controls for z/OS UNIX System Services, ensuring that USS identity and permissions are properly integrated with mainframe security controls (RACF / Top Secret) and aligned to least privilege, auditability, and operational resilience.

Role Overview

The USS Security Engineer is responsible for securing and administering z/OS UNIX System Services (USS) environments on the mainframe. This role focuses on enforcing least privilege, protecting privileged access, and ensuring alignment between UNIX permissions, ESM controls (RACF/TSS), and enterprise security standards. The engineer will partner closely with Enterprise Z security architect, system programmers, middleware teams, and audit/compliance stakeholders to maintain a secure and compliant USS platform.

Key Responsibilities

Administer and manage USS identities, including UIDs, GIDs, OMVS segments, and service/shared IDs based on policy.
Enforce naming standards, ownership traceability, and lifecycle controls for USS users and services.
Manage and audit POSIX permissions, ownership, and execution rights across critical USS file systems.
Control and monitor privileged access, including UID(0), setuid/setgid programs, and elevated authorities.
Administer USS related ESM controls (RACF/TSS), including UNIXPRIV, FACILITY resources, and STARTED task identities.
Secure USS configuration files, shell environments, PATH settings, and file system mount options.
Monitor USS security events, logs, and audit records.
Support production issues, security incidents, and access related investigations.
Develop and maintain USS security standards, procedures, and documentation

Qualifications Required

Bachelor''s degree and 5+ years of experience with mainframe and z/OS UNIX System Services.
Strong hands on experience securing USS environments.
Proven experience administering RACF or equivalent ESM for USS.
Solid understanding of:
UIDs, GIDs, OMVS segments, and service IDs
POSIX permissions, ownership, and execution controls
Experience with USS related security controls, including:
UNIXPRIV class
FACILITY class resources impacting OMVS
STARTED task identities for USS services
Working knowledge of zFS/HFS file systems, mount options, and USS SMF/audit logging.
Strong understanding of least privilege and separation of duties principles.

Desired

Experience with PKI, digital certificates, Kerberos, SSL/TLS, SSH, or OpenSSL.
Exposure to systems programming concepts (e.g., SMP/E, SYS1 datasets, Assembler).
Understanding of mainframe networking concepts.
Experience supporting or securing middleware technologies (e.g., MQ).

Apply