Senior Network Engineer - Space Systems (Hybrid, TS/SCI)

Sphinx Defense; Colorado Springs (CO); Hybrid; USD 144,000 - 176,000; Full time

Benefits offered by this job

Equity ownership

Profit sharing

401(k) contribution

Employer-covered healthcare (MS/VS/DV)

Job summary

Sphinx Defense is seeking a Senior Network Engineer to design, secure, and maintain resilient enterprise networks supporting national security space systems. You’ll work across classified and unclassified networks, collaborating with software, infrastructure, and cybersecurity teams.

The role emphasizes ownership of complex infrastructure challenges, with hands-on networking expertise and systems thinking, in a government/defense environment.

Qualifications

• 10+ years of experience in enterprise or mission-critical network infrastructure.
• Hands-on experience with routing, switching, firewalls, and security-focused designs.
• Comfort working in classified or highly secure environments.
• Experience with Cisco networking technologies and enterprise protocols.
• Experience supporting cloud or hybrid infrastructure environments.

Responsibilities

• Design, configure, maintain, and troubleshoot secure network infrastructure.
• Support routers, switches, firewalls, gateways, and other enterprise networking tech.
• Investigate and resolve network performance, reliability, and connectivity issues across LAN/WAN.
• Maintain compliance with government security requirements in classified networks.
• Perform network monitoring, packet analysis, and root-cause troubleshooting with standard tools.
• Collaborate with cloud, infrastructure, and cybersecurity teams for modernization and scalability.
• Contribute to security controls and segmentation strategies.
• Assist with documentation, technical analysis, and operational reporting for stakeholders.
• Drive infrastructure improvements to increase reliability, automation, and efficiency.
• Support DNS, DHCP, IP management, and other core network services.

Skills

10+ years enterprise network

Cisco networking technologies

Network troubleshooting

Secure network architectures

Cloud/hybrid infrastructure

Stakeholder communication

Tools

Cisco IOS

Job description

Sphinx Defense is seeking a Senior Network Engineer to design, secure, and maintain resilient enterprise networks supporting national security space systems. You’ll work across classified and unclassified networks, collaborating with software, infrastructure, and cybersecurity teams.

The role emphasizes ownership of complex infrastructure challenges, with hands-on networking expertise and systems thinking, in a government/defense environment.