Systems Engineer

ERT, Inc.; San Diego (CA); On-site; USD 120,000 - 150,000; Full time

Job summary

Entarian seeks a Systems Engineer to support U.S. Navy mission systems in secure, operational environments.

You will provide systems engineering, enterprise server administration, continuous software sustainment, cybersecurity compliance, and production operations support across Linux and Windows. The ideal candidate will work in Agile defense software environments, balancing mission availability with cybersecurity and long-term maintainability, with responsibilities spanning architecture

Qualifications

• Active US Top Secret/SCI or TS/SCI eligible with completed Tier 5 investigation.
• 3+ years of demonstrated systems engineering and software sustainment in secure environments using Agile methodologies.
• Proven ability to push software updates to live production with zero or near-zero downtime.
• 2+ years enterprise server administration for Linux and Windows, with scalable virtualization (VMware, AWS).
• Proficiency in DISA STIG compliance and IA requirements.
• Certifications: CompTIA Cloud+ or CompTIA Security+ or equivalent.

Responsibilities

• Perform systems engineering activities supporting secure Navy mission systems and enterprise environments.
• Provide architectural oversight ensuring designs meet mission, technical, cybersecurity, and operational requirements.
• Develop and maintain requirements traceability from stakeholder needs to design, implementation, verification and validation.
• Support system integration across apps, infrastructure, networks, virtualization, and enterprise services.
• Provide continuous software sustainment and operational production support.
• Troubleshoot system, application, infrastructure, and integration issues and coordinate timely resolution.
• Plan, coordinate, and execute software updates and releases with minimal downtime in live environments.
• Support deployments aimed at zero or near-zero downtime with minimal disruption.
• Apply vulnerability management including identification, remediation and patch validation.
• Identify and remediate technical debt affecting performance, security, maintainability, or mission effectiveness.
• Participate in Agile ceremonies and SAFe frameworks as appropriate.

Skills

Agile methodologies

Scrum

Kanban

SAFe

Zero-downtime deployments

Education

CompTIA Cloud+

CompTIA Security+

Tools

VMware vSphere

AWS

Job description

Systems Engineer

• ID
• 2026-9894
• Type
• Full Time W/Benefits Ret Match
• Location : Location
• US-CA-San Diego
• Secondary Location
• US-CA-San Diego
• Security Clearance
• Top Secret

Overview/ Job Responsibilities

Position is contingent upon contract award and funding.

Entarian is seeking a Systems Engineer to support U.S. Navy mission systems in secure, operational environments. The successful candidate will provide systems engineering, enterprise server administration, continuous software sustainment, cybersecurity compliance, and production operations support across Linux and Windows platforms. This position requires hands‑on experience supporting software and infrastructure throughout the system lifecycle, including architecture oversight, requirements traceability, system integration, vulnerability management, technical debt remediation, and controlled deployment of software updates into live production environments. The ideal candidate is comfortable operating in Agile defense software environments and can balance mission availability, cybersecurity requirements, system performance, and long‑term maintainability.

• Perform systems engineering activities supporting secure Navy mission systems and enterprise environments.
• Provide architectural oversight and ensure system designs align with mission, technical, cybersecurity, and operational requirements.
• Develop and maintain requirements traceability from stakeholder needs through design, implementation, verification, and validation.
• Support system integration activities across applications, infrastructure, networks, virtualization platforms, and enterprise services.
• Provide continuous software sustainment and operational support for production systems.
• Troubleshoot system, application, infrastructure, and integration issues and coordinate timely resolution.
• Plan, coordinate, and execute software updates, patches, configuration changes, and releases in live production environments.
• Support deployments designed to achieve zero or near-zero downtime with minimal operational disruption.
• Apply proactive vulnerability management practices, including vulnerability identification, remediation planning, patch implementation, and validation.
• Identify, prioritize, and remediate technical debt affecting system performance, security, reliability, maintainability, or mission effectiveness.
• Participate in Agile ceremonies and activities, including sprint planning, backlog refinement, daily standups, sprint reviews, and retrospectives.
• Apply Agile frameworks such as Scrum, Kanban, or Scaled Agile Framework (SAFe), as appropriate for defense software development and sustainment environments.
• Administer Linux and Windows enterprise servers, including deployment, configuration, hardening, maintenance, and troubleshooting.
• Deploy, configure, and maintain scalable virtualized environments, including platforms such as VMware vSphere and cloud environments such as Amazon Web Services (AWS).
• Conduct continuous system monitoring and assess system health, performance, capacity, availability, and security.
• Implement and maintain DISA Security Technical Implementation Guide (STIG) compliance across applicable systems and environments.
• Support Information Assurance (IA), cybersecurity, authorization, assessment, and continuous monitoring requirements.
• Maintain system documentation, configuration records, architecture artifacts, operating procedures, and sustainment documentation.
• Coordinate with government stakeholders, developers, cybersecurity personnel, network engineers, database administrators, and operations teams.
• Support incident response, root‑cause analysis, corrective actions, and preventive maintenance activities.
• Perform other duties consistent with the Systems Engineer role and program mission requirements.

Salary range: $120,000.00 - $150,000.00

Minimum Qualifications

• Active US Top Secret/SCI or TS/SCI eligible with completed Tier 5 investigation.
• Minimum of three (3) years of demonstrated experience in systems engineering and continuous software sustainment, utilizing modern Agile methodologies to ensure seamless delivery and operational stability in production environments. Qualified experience must encompass systems engineering activities such as architectural oversight, requirements traceability, and system integration within a secure environment, alongside continuous software sustainment tasks including operational support, proactive vulnerability management, and technical debt remediation.
• Candidates must demonstrate active utilization of Agile frameworks, such as Scrum, Kanban, or Scaled Agile Framework (SAFe) tailored to defense software environments, and a proven ability to push software updates to live production environments with zero or near-zero downtime and minimal operational disruption.
• Minimum of two (2) years of recent (last 5 yrs), demonstrated operational experience in enterprise server administration for both Linux and Windows operating systems, including the deployment, configuration, and maintenance of scalable virtualized environments (e.g., VMware vSphere, AWS, etc.).
• Demonstrated proficiency in executing continuous monitoring and implementing rigorous DISA STIG compliance to fulfill stringent cybersecurity and Information Assurance (IA) mandates.
• CompTIA Cloud+, CompTIA Security+, or equivalent operational certifications.

About Us

Formed through the strategic union of Sev1Tech and ERT, Entarian is a premier provider of mission-critical engineering and technology solutions. Founded on a legacy of excellence dating back to 1993, Entarian is a product of an evolved and fully diversified engineering and federal technology leader. From deep space to defense and civilian missions, Entarian delivers secure, mission‑aligned digital solutions that drive national resilience and operational effectiveness. We don't just support modernization; we define it.

Entarian is an Equal Opportunity and Affi mative Action Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, gender identity, national origin, age, protected veteran status, or disability status.