Senior Network Engineer

Sphinx Defense • Colorado Springs, CO

7d • Hybrid

About The Position

Sphinx is hiring a Senior Network Engineer to help design, build, secure, and maintain resilient network infrastructure supporting next-generation national security space systems. This role will support mission-critical systems across classified and unclassified networks, and will require closely collaborating with software, infrastructure, products teams to ensure reliable and secure connectivity for operational systems. We’re looking for someone who enjoys owning complex infrastructure challenges and can bring a strong mix of hands-on networking expertise and systems thinking to the team. You will ensure that the infrastructure underpinning critical national security space missions is performant and secure. This role is designed for someone with deep technical experience supporting enterprise or mission-focused environments, particularly within government, defense, or highly regulated spaces.

Requirements

• 10+ years of experience supporting enterprise or mission-critical network infrastructure
• Hands-on experience with network troubleshooting, routing and switching, firewalls, and secure network architectures
• Comfortable working within classified or highly secure environments
• Experience with Cisco networking technologies and enterprise networking protocols
• Experience analyzing network traffic and troubleshooting complex connectivity issues
• Experience supporting cloud or hybrid infrastructure environments
• Can clearly communicate technical issues, risks, and recommendations to both technical and non-technical stakeholders
• Highly collaborative, self-motivated, and comfortable operating in fast-paced environments with evolving priorities
• Hold an active TS/SCI clearance or are eligible to obtain one
• Must be a US Citizen.
• Must be able to obtain and hold a U.S. TS/SCI security clearance.

Nice To Haves

• Experience supporting multi-cloud or hybrid cloud networking environments
• Familiarity with infrastructure automation or network scripting tools
• Experience supporting space, defense, or government mission environments
• Hold an active DOD 8570 IAT Level II certification or higher (i.e. Security+)

Responsibilities

• Designing, configuring, maintaining, and troubleshooting secure network infrastructure
• Supporting routers, switches, firewalls, gateways, and other enterprise networking technologies
• Investigating and resolving network performance, reliability, and connectivity issues across LAN/WAN environments
• Supporting secure classified network environments and maintaining compliance with government security requirements
• Performing network monitoring, packet analysis, and root cause troubleshooting using industry-standard tools
• Collaborating with cloud, infrastructure, and cybersecurity teams to support modernization and scalability efforts
• Assisting with implementation and maintenance of network security controls and segmentation strategies
• Supporting documentation, technical analysis, and operational reporting for internal and customer stakeholders
• Contributing to infrastructure improvements that increase reliability, automation, and operational efficiency
• Supporting DNS, DHCP, IP management, and other core network services in enterprise environments

Benefits

• Competitive salary
• Meaningful equity ownership
• Profit sharing
• Employer 401(k) contribution
• 100% employer covered medical, dental, and vision insurance for you and your dependents

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed