Senior Core Network Engineer - Top Secret/SCI Clearance

Probity Inc.; Chantilly (VA); On-site; USD 120,000 - 180,000; Full time

Job summary

Probity Inc. is seeking a CORE Network Engineer to support government customers with global enterprise networks. The role focuses on MPLS WAN architecture, hands-on router engineering, and hands-on lab testing to ensure secure, reliable connectivity across critical mission networks.

Active Top Secret/SCI clearance with CI polygraph is mandatory. You will contribute to security accreditation, create technical documentation, and provide Tier-4 support as needed in a fast-paced defense environment

Qualifications

• Requires 10 years of combined work experience and education.
• Must meet DoD 8140 IAT Level 2 compliance.
• Active Top Secret/SCI clearance with CI polygraph is required.

Responsibilities

• Oversee MPLS WAN architecture for the enterprise network.
• Develop MPLS WAN services solutions.
• Perform lab equipment evaluation, integration and testing.
• Assist with the security accreditation process.
• Develop and maintain technical documentation.
• Provide Tier-4 production troubleshooting support when needed.

Skills

MPLS WAN architecture

Hands-on router engineering

Lab equipment evaluation

Technical documentation

Security accreditation

Education

Doctorate + 3 years

Bachelor’s + 6 years

HS diploma + 10 years

Job description

Probity Inc. is seeking a CORE Network Engineer to support government customers with global enterprise networks. The role focuses on MPLS WAN architecture, hands-on router engineering, and hands-on lab testing to ensure secure, reliable connectivity across critical mission networks.

Active Top Secret/SCI clearance with CI polygraph is mandatory. You will contribute to security accreditation, create technical documentation, and provide Tier-4 support as needed in a fast-paced defense environment