Onsite Network Engineer - Security & Lab Infrastructure

Castalia Systems; Arlington (TX); On-site; USD 125,000 - 135,000; Full time

Job summary

Castalia Systems is supporting a U.S. Government customer to provide onsite incident response for civilian agencies and critical asset owners facing cyber-attacks.

As a network engineer, you will implement, maintain, and support lab network infrastructure to enable rapid investigation and remediation. The role requires a Secret clearance with ability to obtain DHS suitability, US Citizenship, and strong experience with VPNs, VDI (Citrix), and enterprise networking.

Qualifications

• BS in 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

Responsibilities

• 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 SOPs and policies.
• Assess network topology and device configurations, identify critical security vulnerabilities, and recommend security best practices.
• Provide user support for VPNs and 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 LAN/WAN, including replication strategy support and remediation of storage-related incidents.
• Design, build, and maintain robust network environments by configuring routers, switches, and firewalls, and updating network devices and IP audits.
• Ensure optimal network performance by troubleshooting issues, enforcing standards, and coordinating with stakeholders to optimize infrastructure.
• Secure network systems through policy enforcement, access controls, and continuous monitoring.

Skills

Network admin

VPNs

Linux

MacOS

Citrix

VMware

Cross-location collaboration

Education

BS in CS/related field

HS Diploma + 7+ years exp

Tools

Citrix

VMware

Cisco switches

Palo Alto

Intersight

Job description

Castalia Systems is supporting a U.S. Government customer to provide onsite incident response for civilian agencies and critical asset owners facing cyber-attacks.

As a network engineer, you will implement, maintain, and support lab network infrastructure to enable rapid investigation and remediation. The role requires a Secret clearance with ability to obtain DHS suitability, US Citizenship, and strong experience with VPNs, VDI (Citrix), and enterprise networking.