Information Systems Security Engineer

We are seeking a highly technical Information Systems Security Engineer (ISSE) to support a U.S. Navy program through the Risk Management Framework (RMF), Authority to Operate (ATO), system hardening, vulnerability remediation, and day-to-day security engineering activities. This is a hands-on engineering position. The ideal candidate is comfortable working directly on Linux servers, virtualization infrastructure, network infrastructure, and security monitoring platforms to implement, troubleshoot, validate, and maintain security controls. The successful candidate will work closely with system administrators, network engineers, and cybersecurity personnel to identify security gaps and implement practical technical solutions that satisfy Navy RMF/ATO requirements. This position is not primarily focused on strategy, program planning, configuration management, or developing project/VM plans. The focus is on technical execution and engineering. Responsibilities Perform hands-on security engineering in support of Navy RMF and ATO requirements. Implement and validate technical security controls across servers, virtualization, network, and logging environments. Harden systems in accordance with applicable DISA STIGs, Navy security requirements, and RMF control requirements. Perform vulnerability remediation, including analysis of findings, root-cause identification, remediation, and validation. Configure, secure, troubleshoot, and validate RHEL/Linux systems. Support security hardening and troubleshooting of VMware environments. Perform security configuration and troubleshooting of Cisco Catalyst and Cisco ACI infrastructure. Support centralized security logging and monitoring using Splunk and Cribl. Analyze system and security logs to troubleshoot issues and validate security requirements. Support collection and validation of technical evidence required for RMF/ATO activities. Translate RMF security requirements into practical technical implementations. Work directly with