Location: Winchester, Virginia 22601
Work Arrangement: Onsite, Monday to Friday
Working Hours: 8:30 a.m. to 5:00 p.m. Eastern Time
Employment Type: Full-time, permanent
Experience: 10 or more years in telecommunications engineering
Security Clearance: Active Secret clearance required
Relocation: Relocation assistance available
Visa Sponsorship: Not available
The Opportunity
A mission-focused defence and public-safety communications organisation is seeking a senior Telecommunications Engineering Specialist to support complex voice modernisation, emergency-call routing and secure SIP interconnection programmes. This is a hands-on engineering role for someone who can deploy, integrate and troubleshoot carrier-grade voice infrastructure within a regulated federal environment.
Working onsite in Winchester, you will support Ribbon Federal Edge gateways, Session Border Controllers and E-911 connectivity across federal voice and Public Safety Answering Point environments.
Key Responsibilities
• Support the deployment, integration and validation of Ribbon Federal Edge gateways and Session Border Controllers.
• Engineer SIP interconnections, policy routing and connectivity across federal voice, VISP and Army PSAP environments.
• Analyse and resolve E-911 and NG911 call-flow issues using packet captures, signalling traces and detailed technical investigation.
• Track engineering issues, assess technical risks and provide clear recommendations and mitigation strategies.
• Perform deployment-readiness reviews and support validation of gateway performance, resilience and interoperability.
• Coordinate with technical stakeholders to resolve issues affecting emergency-call routing, voice connectivity and service performance.
• Document technical findings, deployment status, risks and recommended actions for engineering and programme teams.
Required Experience
• At least 10 years of telecommunications engineering experience, including five or more years in VoIP and SIP engineering.
• Hands-on experience with Ribbon Communications, Sonus or Genband platforms.
• Strong knowledge of Session Border Controllers, SIP signalling, interconnection engineering and policy routing.
• Practical E-911 or NG911 call-routing and PSAP integration experience.
• Advanced Wireshark skills for SIP, RTP and network troubleshooting.
• Active U.S. Secret security clearance.
• Bachelor's degree in Telecommunications, Engineering, Information Technology or equivalent professional experience.
• Current U.S. work authorisation without employer sponsorship.
• Ability to work onsite in Winchester, Virginia, Monday through Friday.
Preferred Experience
• Familiarity with DISA Voice Internet Service Provider environments.
• Army Voice Modernization or comparable federal voice-transformation experience.
• Public Safety Answering Point interconnection and emergency-communications experience.
• Background in NG911 public-safety communications.
• Current Cisco CCNP or CCIE certification.
Benefits
• Medical, dental and vision insurance.
• Disability, life insurance and employee assistance benefits.
• 401(k) retirement plan.
• Paid time off, paid holidays and bereavement leave.
• Relocation assistance for the successful candidate.
The Ideal Candidate
You are a senior telecommunications engineer with deep SIP and VoIP expertise and a strong understanding of emergency-call routing in secure federal environments. You can move confidently between gateway configuration, packet-level troubleshooting, deployment validation and stakeholder coordination, while communicating technical risks and practical solutions clearly.
Application
Please submit an up-to-date resume outlining your Ribbon, Sonus or Genband experience, SIP and VoIP engineering background, E-911 or PSAP integration work, Wireshark expertise, current location and active Secret clearance status.