Mainframe Security Engineer

CTG is seeking a Mainframe Security Engineer to support and secure enterprise IBM z/OS environments for our client. This role is responsible for administering mainframe security controls, managing user access, supporting compliance initiatives, monitoring system activity, and protecting critical infrastructure from security threats and unauthorized access.

Phoenix, AZ metro area (Hybrid working model)

6 months with option to convert after 6 months

USC, Permanent Resident, or other EAD holders only (no visa-dependent candidates)

• Administer and maintain security controls for IBM z/OS mainframe environments
• Configure and manage RACF, ACF2, and/or Top Secret security platforms
• Implement RBAC, privileged access management, and user access controls
• Monitor audit logs, security events, and system activity for potential threats
• Perform vulnerability assessments and remediation activities
• Support compliance initiatives including SOX, PCI-DSS, HIPAA, and NIST
• Configure encryption, MFA, certificates, and secure communications
• Automate security administration tasks using REXX, JCL, or scripting tools
• Support incident response, forensic investigations, and disaster recovery planning
• Collaborate with cybersecurity, infrastructure, audit, and application teams

• Strong experience with IBM z/OS security administration
• Hands-on expertise with RACF, ACF2, or CA Top Secret
• Knowledge of IAM, RBAC, and privileged access controls
• Experience with mainframe security auditing and compliance
• Familiarity with encryption technologies and MFA integration
• Scripting and automation experience using REXX and JCL
• Strong troubleshooting and analytical skills

• 5+ years of experience in mainframe security engineering or administration
• Experience supporting enterprise or highly regulated environments preferred
• Bachelor’s degree in IT, Computer Science, Cybersecurity, or related field preferred
• CISSP, CISM, or IBM security certifications are a plus

Excellent verbal and written English communication skills and the ability to interact professionally with a diverse group are required.

CTG will consider for employment all qualified applicants including those with criminal histories in a manner consistent with the requirements of all applicable local, state, and federal laws.

CTG is an Equal Opportunity Employer. CTG will assure equal opportunity and consideration to all applicants and employees in recruitment, selection, placement, training, benefits, compensation, promotion, transfer, and release of individuals without regard to race, creed, religion, color, national origin, sex, sexual orientation, gender identity and gender expression, age, disability, marital or veteran status, citizenship status, or any other discriminatory factors as required by law.

CTG is fully committed to promoting employment opportunities for members of protected classes.