Job Description Information Systems Security Engineer & ACAS System Administrator Location: Norfolk, VA We're looking for an experienced Information Systems Security Engineer & ACAS System Administrator to join our team in Norfolk, VA. In this role, you will be responsible for leading vulnerability assessment operations using ACAS, coordinating mitigation plans, and serving as the primary point of contact for incident response efforts. Responsibilities Lead vulnerability assessment operations using ACAS (Nessus, Security Center). Conduct regular vulnerability scans and manage remediation tracking. Perform incident investigations and develop remediation strategies. Create ATO documentation to support RMF accreditation. Monitor system integrity through auditing and patch management. Ensure compliance with DoD security requirements. Design and optimize security workflows. Required Qualifications Active Secret clearance (with the ability to obtain a Top Secret DoD 8570 IAT Level 2 certification 5 years of experience in technical problem-solving. Proven experience with ACAS architecture administration, vulnerability remediation, and patch management. Proficiency in Windows/Linux system administration, Active Directory, and domain services. Knowledge of DoD STIGs and compliance requirements. Experience with TCP/IP networking and firewall configurations. Experience with ACAS deployment in enterprise environments. Strong understanding of system integration and authentication. Familiarity with automation scripting and technical documentation. Demonstrated experience with end-to-end vulnerability management.