Sr. VoIO/VTC Telephony Engineer

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Salary: $120,000 - $150,000 per year

A bit about us:

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.

Why join us?

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.

Job Details

Senior VoIP, VTC & Telephony Solution Engineer

Position Overview
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.

Key Responsibilities
VoIP, Telephony & Collaboration Engineering

• 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.

Hands-On Engineering & Troubleshooting

• 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 AudioCodes, 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.

Network & QoS Integration

• Collaborate with Network and Transport Engineering teams to design and validate end-to-end Quality of Service (QoS).
• Support DSCP and Layer 2 Class of Service marking, queuing, shaping, policing, call-admission control, bandwidth planning, and class-of-service mapping.
• Analyze IP networking and transport conditions affecting SIP signaling and real-time voice/video traffic.
• Perform packet-level analysis and troubleshooting to identify network, signaling, media, and interoperability issues.

Systems Engineering & Solution Lifecycle

• Analyze operational, functional, technical, cybersecurity, performance, availability, and supportability requirements.
• Translate business and technical requirements into system, subsystem, interface, configuration, and testing requirements.
• Evaluate technical alternatives based on capability, cost, risk, interoperability, lifecycle status, security, supportability, and implementation complexity.
• Develop and maintain high-level and low-level designs, interface definitions, bills of material, configuration baselines, implementation procedures, rollback plans, test plans, and as-built documentation.
• Plan and perform laboratory validation, interoperability testing, system testing, acceptance testing, and other verification activities.
• Support the transition of new and modified solutions into operations, ensuring monitoring, documentation, training, support procedures, and operational dependencies are addressed.

Technical Leadership & Project Execution

• Lead the technical planning and execution of complex VoIP, VTC, telephony, and collaboration projects.
• Coordinate engineering activities across multiple technical areas and identify dependencies, risks, and technical milestones.
• Provide technical direction and guidance to engineers assigned to projects and engineering initiatives.
• Review engineering work products and resolve technical issues affecting performance, schedule, security, or operational readiness.
• Support engineering estimates, bills of material, implementation schedules, staffing assumptions, and levels of effort.
• Mentor engineers through design reviews, troubleshooting, peer reviews, and knowledge-sharing activities.

Stakeholder & Vendor Collaboration

• Work closely with network engineering, cybersecurity, operations, program management, customers, telecommunications carriers, and technology vendors.
• Lead or participate in technical interchange meetings, architecture reviews, design reviews, test-readiness reviews, and implementation-readiness reviews.
• Coordinate technical activities with equipment manufacturers, software providers, SIP providers, telecommunications carriers, system integrators, and other technical partners.
• Clearly communicate technical issues, risks, alternatives, and recommendations to both technical and nontechnical stakeholders.

Required Qualifications

• Bachelor's degree in Computer Science, Information Technology, Telecommunications, Electrical Engineering, Systems Engineering, or a related technical field.
• Typically 8-12 years of relevant professional experience with a bachelor's degree or 6-10 years with a master's degree. Equivalent education, certifications, and practical experience may be considered.
• Extensive engineering experience with VoIP, VTC, enterprise telephony, unified communications, collaboration systems, networking, or related technologies.
• Strong knowledge of SIP, SDP, RTP/RTCP, SRTP, H.323, MGoogle Cloud Platform, ISDN/PRI, and related signaling and media protocols.
• Experience with enterprise call-control platforms such as Cisco Unified Communications Manager (CUCM), Cisco Unity Connection, Microsoft Teams Phone, or comparable platforms.
• Strong experience with enterprise dial plans, E.164 numbering, SIP trunks, PSTN connectivity, voice gateways, voicemail, and carrier services.
• Experience configuring and troubleshooting enterprise Session Border Controllers.
• Strong working knowledge of IP networking, routing, switching, VLANs, firewalls, NAT, QoS, packet analysis, and bandwidth planning.
• Demonstrated experience troubleshooting complex signaling, media, network, and interoperability issues.
• Experience leading complex technical implementations, migrations, or engineering workstreams.
• Experience providing technical guidance, mentoring, peer review, or training to other engineers.

Preferred Technical Experience

• Cisco Unified Communications Manager (CUCM)
• Cisco Unity Connection
• Cisco CUBE
• Microsoft Teams Phone
• Microsoft Teams Direct Routing
• Microsoft Operator Connect
• Cisco Webex Calling
• Cisco Room Series
• Microsoft Teams Rooms
• Zoom Rooms
• Poly and Crestron collaboration technologies
• AudioCodes Mediant
• Ribbon SBC
• Oracle Communications SBC / Acme Packet
• SIP trunking and carrier integrations
• Enterprise QoS design and troubleshooting
• Wireshark and packet-level voice/video troubleshooting
• SIP TLS, mutual TLS, SRTP, certificates, and PKI
• Cloud and hybrid voice architectures
• Highly available and geographically distributed voice/video environments
• PowerShell, Python, REST APIs, or comparable automation technologies

Preferred Certifications

• Cisco Certified Network Professional (CCNP) Collaboration or comparable advanced UC/voice certification.
• Cisco Certified Internetwork Expert (CCIE) Collaboration is beneficial but not required.
• Microsoft certification related to Teams Phone or collaboration communications systems.
• AudioCodes, Ribbon, Cisco, Microsoft, or comparable voice and collaboration certifications.

Additional Skills

• Strong analytical and complex troubleshooting capabilities.
• Excellent written and verbal communication skills.
• Ability to independently lead complex technical initiatives while collaborating across multiple teams.
• Ability to communicate complex technical concepts, risks, and recommendations to technical and nontechnical stakeholders.
• Strong customer and stakeholder-management skills.
• Experience developing technical proposals, statements of work, bills of material, implementation plans, migration plans, levels of effort, and technical risk assessments.
• Strong commitment to engineering quality, documentation, knowledge sharing, and continuous improvement.

Interested in hearing more? Easy Apply now by clicking the "Apply Now" button.

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