Network Engineer

Castalia Systems

Network Engineer supporting incident response for U.S. Government clients.

Posted 7/21/2026full-timeArlington • Virginia • 🇺🇸 United StatesMid-LevelSenior💰 $125,000 - $135,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in network administration and engineering, with a strong focus on designing and implementing secure infrastructure solutions. Proficient in troubleshooting complex network issues and optimizing performance across diverse operating systems and virtual environments.

Highest-signal resume keywords

Network AdministrationRouters, Switches, FirewallsVirtual Desktop Infrastructure (VDI)Linux/Unix ProficiencySecurity Best Practices

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Network EngineeringInfrastructure Solutions DesignTechnical TroubleshootingAccess Control ImplementationSystem Performance MonitoringBackup Protocols ManagementNetwork Topology AssessmentDevice ConfigurationSecurity Vulnerability IdentificationReplication Strategy Support

Soft Skills

Collaborative WorkProblem Solving

Tools & Technologies

CitrixVMwareVirtual Private Networks (VPNs)MacOSIOS

Industry Keywords

Standard Operating Procedures (SOPs)Network Administration ExperienceComputer Science DegreeComputer Engineering DegreeComputer Information Systems Degree

Tech Stack

Tools & technologies

CitrixFirewallsiOSLinuxMacOSUnixVMware

About the role

Key responsibilities & impact

Leverage advanced analytical and technical skills to design and implement infrastructure solutions that enhance mission execution and support command decision-making.
Support the integration of new technologies and equipment within lab environments, including development and refinement of standard operating procedures (SOPs) and policies.
Assess network topology and device configurations, identify critical security vulnerabilities, and recommend security best practices.
Provide user support for Virtual Private Networks (VPNs), Virtual Desktop Infrastructure (VDI) such as Citrix, as well as MacOS and iOS platforms.
Troubleshoot and resolve a broad range of technical issues, from basic to complex network problems
Implement granular access controls, monitor system performance and accessibility, establish and maintain backup protocols, and ensure system security.
Diagnose and resolve complex enterprise storage issues across local and wide area networks, including replication strategy support and remediation of storage-related incidents.
Design, build, and maintain robust network environments by configuring routers, switches, and firewalls, as well as updating network devices and performing IP address audits.
Ensure optimal network performance by troubleshooting issues, enforcing system standards, and collaborating with stakeholders to optimize infrastructure.
Secure network systems through policy enforcement, access controls, and continuous monitoring.

Requirements

What you’ll need

BS Computer Science, Computer Engineering, Computer Information Systems, Computer Systems Engineering or related degree; or HS Diploma and 7+ years network administration, network engineering or systems administration experience.
5+ years of directly relevant experience in network administration
Proficiency with multiple operating systems, including Linux/Unix and MacOS
Strong knowledge and experience with routers, switches, firewalls, and VPNs
Experience and knowledge of networking and network administration
Skilled in working with virtual desktop environments (Citrix, VMware)
Must be able to work collaboratively across physical locations

Benefits

Comp & perks

Medical, dental, vision coverage
401k matching
Generous PTO
Paid holidays
Professional training opportunities
Pet insurance