Principal, VOIP Engineer

Ziply Fiber•Everett, WA

23h•$97,500 - $152,000

About The Position

The Principal VoIP Engineer is a senior member of the Voice Engineering team responsible for architecting, designing, implementing, and maintaining enterprise VoIP solutions. This role provides technical leadership in the development of scalable, secure, and highly available voice infrastructure, ensuring optimal performance and alignment with organizational objectives. The Principal VoIP Engineer serves as a subject matter expert, guiding strategic voice initiatives, supporting complex deployments, and driving continuous improvement across the voice environment.

Requirements

High school diploma or GED.
Bachelor's Degree in related field; or equivalent combination of education and experience.
Minimum of five (5) years’ experience in a Class 4 or 5 TDM/Soft Switch/Hybrid Central Office environment such as Metaswitch, BroadSoft, Lucent 5ESS, Nortel DMS, and GENBAND G6
Experience with hosted and cloud-based voice applications and services.
Experience with network monitoring, management and troubleshooting with various tools such as Packet Sniffer utilities, Wireshark and Metaswitch SAS.
Experience in designing, implementation, and maintaining secure IP networks.
Extensive knowledge of feature delivery in hosted VoIP environment (hosted services, SIP trunking, PRI trunking via IAD, VoIP CPE, enhanced business features, etc.).
Extensive knowledge of VoIP protocols, SIP signaling with emphasis on RTP and SDP, network QOS, IP routing, Ethernet switching (including 802.11q, 802.11p, 802.3af), and packet tagging mechanisms.
Ability to interface well with customers (internal and external).
Ability to work independently and apply sound judgment and reasoning skills to a variety of situations.
Ability to multi-task and collaborate effectively with other personnel to meet deadlines.
Strong verbal and written communication, attention to detail, and organizational skills.
Ability to work within critical deadlines.
Ability to adjust to rapidly changing priorities and schedules.
Ability to provide excellent customer service.
Applicants must be currently authorized to work in the US for any employer. Sponsorship is not available for this position.

Responsibilities

Provide support for SIP and TDM based soft switch translations, facilities and features on the Metaswitch Call Agent and Media Gateways, Enhanced Application Servers, and SBCs.
Maintaining and updating LERG daily.
Extensive experience supporting central office switching and softswitch platforms, including legacy TDM systems (e.g., Nortel DMS-100, Lucent 5ESS) and modern VoIP/SIP infrastructures.
Deep expertise in SS7, SIP, PRI, media gateways, and session border controllers, including trunk provisioning, call routing, E911, and inter-carrier interconnects.
Proven ability to troubleshoot end-to-end voice issues across TDM and IP transport layers, ensuring high availability in geographically redundant central office environments.
Support Product Engineering with systems architecture planning, system implementation guidelines, and engineering guidelines.
Perform lab testing, design, and architecture work.
Architect new VoIP products and features.
Coordinate with vendors, analyze appropriate product offering and develop new products and services for network.
Test and approval of new product sets.
Provide technical assistance and support to other Service Management teams.
Assist management with all high priority projects and prepare technical presentations.
Provide off-hours, on-call, and weekend coverage as required.
Performs other duties as required to support the business and evolving organization.