Sr. VoIO​/VTC Telephony Engineer

$120000 - $150000 per year | MONTGOMRY VLG, MD | Remote | Permanent

We are a technology and engineering organization focused on delivering innovative solutions for complex, mission-critical environments. Our teams bring together deep technical expertise, practical problem-solving, and a commitment to delivering solutions that make a measurable impact.

We partner with government and defense organizations to tackle challenging programs across systems engineering, software development, data science, artificial intelligence, cybersecurity, and advanced technology. Our people work on meaningful projects where reliability, security, and performance matter.

We believe the best solutions come from talented people who are empowered to think creatively, collaborate closely, and solve difficult problems. If you're looking for an opportunity to work on challenging technology while supporting important missions, we'd love to hear from you.

Our client offers highly competitive compensation packages, comprehensive benefits, and a collaborative, people-first culture that promotes innovation, professional growth, and long-term career development. We are committed to creating an environment where employees are empowered to make an impact, work alongside highly talented teams, and contribute to meaningful, mission-critical initiatives in a supportive and forward-thinking workplace.

Senior VoIP, VTC & Telephony Solution Engineer

We are seeking an experienced, hands-on Senior VoIP, VTC & Telephony Solution Engineer to design, integrate, validate, deploy, and support enterprise Unified Communications (UC) and Collaboration solutions.

This position will serve as a senior technical contributor and may act as the technical lead for assigned projects, engineering initiatives, and complex implementations. The engineer will develop solutions to challenging technical problems spanning multiple systems and technologies while ensuring solutions are secure, resilient, scalable, supportable, and operationally ready.

The ideal candidate will have deep expertise in enterprise voice, video, telephony, Session Initiation Protocol (SIP), Session Border Controllers (SBCs), and modern collaboration platforms. This is a hands-on engineering role that also requires strong technical leadership, troubleshooting, and cross-functional collaboration.

• Design and integrate enterprise VoIP, VTC, telephony, SIP, SBC, and collaboration solutions.
• Engineer enterprise dial plans,
  
  E.164 number normalization, digit manipulation, call routing, SIP trunking, carrier connectivity, PSTN services, voice gateways, voicemail, and emergency-calling capabilities.
• Design and integrate multi-vendor VTC and audiovisual collaboration environments, including Cisco Room Series, Webex, Poly, Microsoft Teams Rooms, Crestron, Zoom Rooms, and comparable technologies.
• Develop integrations between on-premises voice infrastructure and cloud collaboration platforms such as Microsoft Teams Phone, Direct Routing, Operator Connect, and Webex Calling.
• Design for high availability, geographic redundancy, survivability, disaster recovery, capacity management, and service continuity.
• Evaluate emerging voice, video, and collaboration technologies through proof-of-concept testing, interoperability testing, and technical risk assessments.

• Configure, integrate, test, and deploy IP telephony systems, SIP proxies, voice gateways, Session Border Controllers, VTC systems, and unified communications platforms.
• Configure and troubleshoot SBC technologies including Audio Codes, Ribbon, Cisco CUBE, Oracle Communications SBC/Acme Packet, and comparable platforms.
• Troubleshoot complex voice and video issues involving call routing, signaling, media negotiation, interoperability, packet loss, jitter, latency, one-way audio, call quality, and service availability.
• Perform root-cause analysis, identify underlying technical issues, develop corrective actions, and document lessons learned.
• Evaluate routing, switching, VLANs, firewalls, NAT, DNS, certificates, and transport conditions affecting voice and video services.
• Support monitoring, alerting, call-quality analytics, call-detail records, capacity reporting, and service trend analysis.

• Collaborate with Network and Transport Engineering teams to design and validate end-to-end…