Senior VoIP​/SIP Engineer – E911​/SBC

Overview

Telecommunications Engineering Specialist (Secret Clearance Required) —

Location:

Winchester, VA (On-site, Monday–Friday, 8:30 AM–5:00 PM ET)

We are seeking a Senior Telecommunications Engineering Specialist to support mission-critical federal voice communications for Army Voice Modernization (VMOD) initiatives. This role focuses on Ribbon Federal Edge deployment, SIP interconnection engineering, and E-911/NG911 call routing across DISA VISP, Army PSAP environments, and related federal voice infrastructure.

The ideal candidate brings deep expertise in VoIP/SIP engineering, Session Border Controllers (SBCs), and emergency call routing within U.S. federal or DoD telecom environments.

Active Secret Clearance is required.

• Support deployment and integration of Ribbon Federal Edge gateways and SBC environments
• Design, troubleshoot, and maintain SIP interconnection and policy routing across federal voice networks
• Analyze and resolve E-911 / NG911 call flow and routing issues across PSAP environments
• Perform end-to-end voice network troubleshooting using packet capture and SIP analysis tools (e.g., Wireshark)
• Support deployment validation, readiness assessments, and interoperability testing
• Coordinate technical integration between Federal Edge systems, DISA VISP, and Army PSAP infrastructure
• Identify technical risks and provide mitigation strategies for voice network deployments
• Support engineering issue tracking, documentation, and cross-agency technical coordination

• Active Secret Clearance (mandatory)
• 10+ years of telecommunications engineering experience
• 5+ years of VoIP/SIP engineering experience
• Strong experience with SIP signaling, call flows, and interconnection engineering
• Hands-on experience with Ribbon Communications, Sonus, or Genband platforms
• Experience with Session Border Controllers (SBCs) in enterprise or carrier environments
• E-911 / PSAP or NG911 call routing integration experience
• Proficiency using Wireshark or equivalent packet capture tools
• Bachelor's degree in Telecommunications, Engineering, IT, or equivalent experience

• Prior work with DISA VISP, Army VMOD, or U.S. DoD voice modernization programs
• Experience supporting PSAP interconnectivity or emergency communications systems
• Familiarity with NG911 architecture and public safety call routing
• Cisco certifications (CCNP or CCIE preferred)
• Experience in federal contractor or multi-agency regulated environments

• On-site role in Winchester, VA
• Federal/DoD contractor environment with structured change control and cross-agency coordination
• Mission-critical communications supporting defense and emergency response systems

Competitive salary based on experience. Full benefits package including medical, dental, vision, life insurance, disability coverage, Employee Assistance Program (EAP), paid time off, holidays, bereavement leave, and 401(k).

Telecommunications Engineer, VoIP Engineer, SIP Engineer, SBC Engineer, Ribbon Engineer, E-911 Engineer, NG911 Specialist, PSAP Integration Engineer, Federal Telecom Engineer, DISA VISP, Army VMOD, VoIP Architect, Voice Network Engineer, Wireshark Analyst, Defense Contractor Telecommunications Specialist.