Mainframe Logical Security Engineer

Required Qualifications 5+ years of experience in IBM z/OS mainframe environments. Strong hands-on experience with RACF administration (or ACF2 / Top Secret). Experience with user and group management. Experience administering dataset and subsystem security. Experience conducting security audits and access reviews. Experience monitoring and analyzing security logs. Strong understanding of z/OS security architecture, access control models, and compliance practices. Excellent troubleshooting and analytical skills. Roles & Responsibilities Administer and support RACF, ACF2, or Top Secret security environments. Manage user IDs, groups, roles, and access permissions. Configure and maintain dataset and subsystem security controls. Perform access reviews, security audits, and compliance validations. Monitor security logs and investigate access/security-related issues. Troubleshoot and resolve security administration requests and incidents. Partner with audit, compliance, and infrastructure teams to maintain secure operations. Support regulatory, internal, and external audit requirements. Preferred Qualifications Experience with ACF2 or Top Secret. Familiarity with SIEM tools such as Splunk, QRadar, or similar. Experience supporting enterprise audits and compliance initiatives. Exposure to IAM, SSO, and MFA solutions. Automation or scripting experience (REXX, Python, Shell). Experience in financial services or other regulated environments. Key Skills IBM z/OS Security RACF / ACF2 / Top Secret User & Group Administration Dataset & Subsystem Security Security Audits & Access Reviews Security Log Monitoring Compliance & Access Controls SIEM Tools (Splunk, QRadar)

IAM, SSO, MFA