SENIOR SYSTEM SECURITY ENGINEER

***Senior System Security Engineer - Full-Time - Hybrid Work Model (Norco, CA)***

Job Summary:

We are seeking a highly skilled System Security Engineer to support the design, implementation, and sustainment of secure DoD IT systems. This role blends system administration, cybersecurity auditing, and architecture responsibilities. The engineer will play a key role in ensuring compliance with DoD and Navy cybersecurity standards, supporting RMF efforts, and providing technical expertise for system hardening, vulnerability management, and secure architecture design.

As with any position, additional expectations exist. Some of these include, but are not limited to, adhering to normal working hours, meeting deadlines, following company policies as outlined by the Employee Handbook, communicating regularly with assigned supervisor(s), staying focused on the assigned tasks, and completing other tasks as assigned.

Responsibilities:

• Serve as a technical lead for system security engineering, design, and implementation

• Administer and secure Windows/Linux systems in compliance with DoD cybersecurity requirements

• Conduct security audits and assessments to ensure compliance with RMF, STIGs, and NIST 800-53 controls

• Support the development and maintenance of System Security Plans (SSPs), POA&Ms, and other RMF documentation

• Provide expertise in secure architecture, system hardening, and vulnerability remediation

• Monitor, analyze, and resolve system security events, incidents, and findings

• Coordinate with ISSOs, ISSMs, and system owners to address cybersecurity risks and implement mitigations

• Use tools such as eMASS, ACAS, and HBSS for compliance reporting and vulnerability management

• Support accreditation packages and system authorizations for DoD systems

• Mentor junior staff and provide guidance on cybersecurity best practices and system security engineering

Basic Qualifications:

• If applicable: If you are or have been recently employed by the U.S. government, a post-employment ethics letter will be required if employment with VSolvit is offered
• United States Citizenship required

• Active Secret clearance

• Bachelor's degree in Computer Science, Cybersecurity, Information Systems, or related field (or equivalent experience)

• 5+ years of experience in system administration and cybersecurity engineering

• Hands-on experience with Windows/Linux administration, system hardening, and STIG application

• Strong understanding of DoD RMF, NIST 800-53, and DISA STIGs

• Experience with eMASS, ACAS, HBSS, or similar compliance and vulnerability tools

• Excellent problem-solving and communication skills

Preferred Qualifications:

• CISSP, Security+, or other DoD 8570 IAM/IASAE certification

• Experience supporting Navy or DoD IT environments

• Knowledge of cloud security within Azure or AWS DoD environments

• Experience in developing secure architectures for enterprise or mission-critical systems

• Familiarity with incident response and vulnerability management best practices

• Prior experience contributing to or leading RMF accreditation packages