Job DescriptionJob SummaryNetmaker Communications, LLC (NMC) is seeking a Senior Telecom Engineer to support our Managed Services Provider Business Unit as well as our Next-Generation 9-1-1 Interoperability Test Lab. Candidate must be familiar with carrier grade VOIP service delivery platforms as well as emerging IPV6 requirements for VOIP and NG 9-1-1. Candidate must also be experienced with Class 5IP-PBX technology to include Session Border Controllers and Policy Engines utilized for advanced VoIP call routing.
Total RewardsIn addition to your salary, PTO, paid holidays, and bereavement leave, NMC offers a robust benefits package to support you and your family in a variety of ways. We offer medical, dental, vision, disability, EAP and life insurance benefits as well as a 401(k) plan. Salary is commensurate with experience.
Work ScheduleThis position is Monday through Friday, 8:30 a.m. to 5:00 p.m. East Coast Time. This position is an on-site position located at company headquarters in Winchester, VA.Primary Functions- Lead engineering of carrier-grade VoIP platforms (SBCs, softswitches, policy engines).
- Design and validate SIP-based call routing and interoperability across multi-vendor environments.
- Support NG9-1-1 / ESInet architectures, including location services and emergency call flows.
- Conduct advanced troubleshooting (signaling, media, routing, and performance issues).
- Integrate voice systems into enterprise and carrier networks (IPv4/IPv6, MPLS, cloud).
- Support TDM decommissioning and SIP migration strategies.
- Execute interoperability testing and validation within lab environments.
- Develop engineering documentation and support customer engagements.
Key Responsibilities- Design, configure, and implement carrier-grade VoIP solutions (Class 4/5 softswitches, SBCs, policy engines).
- Engineer and troubleshoot end-to-end SIP call flows (signaling, media, routing, failover).
- Support NG9-1-1 / ESInet environments, including call routing and location services.
- Perform deep troubleshooting using packet capture and call trace analysis.
- Integrate VoIP solutions into IPv4/IPv6, MPLS, and cloud/hybrid environments.
- Support TDM to IP migration efforts (PRI to SIP transitions).
- Implement and validate security controls (TLS, SRTP, SBC policies).
- Conduct interoperability testing and validation in a lab environment.
- Develop technical documentation, call flows, and engineering designs.
- Interface with customers, vendors, and internal engineering teams.
Required Qualifications- 10-15+ years of experience in VoIP, telecommunications, or network engineering.
- Bachelor's degree in Computer Science, Information Technology, Scienceand Technology, Telecommunications or related field.
- Strong expertise in SIP, RTP, codecs, and call routing.
- Experience with SBC platforms (Ribbon, Oracle/Acme Packet, Audiocodes, etc.).
- Experience with IP-PBX systems and SIP trunking environments.
- Strong networking knowledge (routing, switching, QoS, VLANs, IPv6).
- Experience troubleshooting complex, multi-vendor VoIP environments.
- Master's degree a plus.
