Network Engineer - TS/SCI w/FULL SCOPE POLY

Yellowfin Technology Corp. is seeking experienced Network Engineers to support critical national security missions within the IC. We are building a pipeline of highly skilled professionals who are passionate about designing, implementing, securing, and maintaining enterprise network infrastructure supporting mission-critical operations.

Whether you are an early-career engineer or a senior technical leader, we are interested in professionals with expertise in Cisco networking technologies, enterprise infrastructure, network security, and large-scale systems integration.

Responsibilities Depending on experience level, responsibilities may include:

• Design, implement, configure, and maintain enterprise network infrastructure.

• Monitor network performance and availability while identifying opportunities for optimization.

• Perform routing, switching, and network troubleshooting across complex environments.
• Support network architecture, engineering, and modernization initiatives.
• Develop and maintain network diagrams, documentation, and accreditation artifacts.
• Integrate hardware and software solutions supporting DoW and IC environments.
• Support Cyber Network Defense (CND) operations and network security initiatives.
• Perform system upgrades, migrations, patching, and lifecycle refresh activities.
• Utilize network monitoring, diagnostic, and performance analysis tools.
• Support testing, validation, and quality assurance of network implementations.

• Collaborate with systems engineers, cybersecurity professionals, software developers, and mission stakeholders.

• Lead large-scale network installation and integration efforts (senior-level positions).

• Bachelor’s degree in network engineering, Computer Science, Information Technology, or related discipline (experience substitution allowed per contract)

• 3+ years of network engineering experience
• Cisco Certified Network Professional (CCNP) required

Network Engineer 2 (NE2)

• Bachelor’s degree with 6+ years of experience or Master’s degree with 4+ years
• Cisco certification required
• Experience supporting enterprise network architecture and infrastructure

Network Engineer 3 (NE3)

• Master’s degree with 10+ years, Bachelor’s degree with 12+ years, or equivalent experience

• Cisco Certification required
• IAT Level III Certification required
• Experience leading enterprise network engineering projects

Preferred Skills

• Cisco Routing & Switching
• Enterprise LAN/WAN
• BGP, OSPF, EIGRP
• Cisco Catalyst & Nexus
• Cisco Firepower / ASA
• Network Automation (Python, Ansible)
• SD-WAN
• Network Monitoring & Performance Analysis
• SolarWinds
• Wireshark
• Network Architecture
• Network Security