Mainframe Security Engineer

Location: Pittsburgh, PA or Lake Mary, FL We are seeking an experienced Mainframe Security Engineer to provide day-to-day tactical support for vulnerability management and z/OS security initiatives. This role will serve as a subject matter expert across ACF2, TSS, and RACF, supporting security hardening, vulnerability remediation, asset modeling, project documentation, and collaboration between mainframe engineering and information security teams. Key Responsibilities Serve as a subject matter expert in z/OS Mainframe Security, including ACF2, TSS, and RACF.Support vulnerability management initiatives, security hardening, and vulnerability remediation.Apply z/OS STIGs and security controls to mainframe environments.Perform detailed data analysis and asset modeling to support security projects.Provide guidance on security standards and hardening requirements.Interface directly with client teams to provide training and day-to-day support for vulnerability and utility tools.Develop and maintain project documentation and communicate between mainframe engineering and information security teams. Required Qualifications 7–10+ years of zSecure Audit experience, including CARLa programming.Strong experience with Broadcom ACF2 and/or Top Secret (TSS).Hands-on experience leveraging z/OS RACF STIGs for security hardening.Strong knowledge of Mainframe REXX, IBM SYNCSORT, and ICETOOL.Experience with mainframe security vulnerability management.Strong communication, documentation, and client-facing skills.Bachelor’s degree or 15+ years of Mainframe Security experience. Preferred Qualifications z/OS security consulting or penetration testing experience.10+ years of ACF2 or TSS experience.Experience with JIRA, Confluence, and SharePoint.