Principal, VOIP Engineer

Principal, VOIP Engineer

FULL TIME

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ZIPLY FIBER

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UNITED STATES

Posted On 04/09/2026

Job Description Position Title:

Principal VOIP Engineer Base Salary:

$97,500 to $152,000 annually

DOE Benefits:

Medical, dental, vision, 401k, flexible spending account, paid sick leave and paid time off, parental leave, quarterly performance bonus, training, career growth and education reimbursement programs. Ziply Fiber is a local internet service provider dedicated to elevating the connected lives of the communities we serve. We offer the fastest home internet in the nation, a refreshingly great customer experience, and affordable plans that put customers in charge. As our state-of-the-art fiber network expands, so does our need for team members who can help us grow and realize our goals. Our 

Company Values:

Genuinely Caring:

 We treat customers and colleagues like neighbors, with empathy and full attention.

Empowering You:

 We help customers choose what is best for them, and we support employees in implementing new ideas and solutions.

Innovation and Improvement:

 We constantly seek ways to improve how we serve customers and each other.

Earning Your Trust:

 We build trust through clear, honest, human communication. Job Summary Although this is a remote position, the selected candidate must reside within Ziply Fiber's four-state footprint (WA, OR, ID, or MT). Limited travel (possibly 10-20%) is required, including potential attendance at conferences and business events such as symposiums. 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.

Essential Duties and Responsibilities:

The Essential Duties and Responsibilities listed below are a range of duties performed by the employee and not intended to reflect all duties performed. Voice Switching & Network Operations

• 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. Protocol Expertise & Troubleshooting
• 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. Architecture, Design & Engineering
• 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. Product Development & Vendor Coordination
• Coordinate with vendors, analyze appropriate product offering and develop new products and services for network.
• Test and approval of new product sets. Operational Support & Project Leadership
• 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. Other Duties
• Performs other duties as required to support the business and evolving organization.

Required Qualifications:

• 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).

Knowledge, Skills, and Abilities:

• 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.

Work Authorization Applicants must be currently authorized to work in the US for any employer. Sponsorship is not available for this position. Physical Requirements The physical demands described here are representative of those that must be met by an employee to successfully perform the essential functions of this job. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions. Essential and marginal functions may require maintaining physical condition necessary for bending, stooping, sitting, walking, or standing for prolonged periods of time; most of time is spent sitting in a comfortable position with frequent opportunity to move about. The employee must occasionally lift and/or move up to 25 pounds. Specific vision abilities required by the job include close vision, distance vision, color vision, peripheral vision, depth perception, and the ability to adjust focus. Work Environment Work is performed in an office setting with exposure to computer screens and requires extensive use of a computer, keyboard, mouse, and multi-line telephone system. The work is primarily a modern office setting. At all times, Ziply Fiber must be your primary employer. Unless otherwise prohibited by law, employees may not hold outside employment nor be self-employed without obtaining approval in writing from Ziply Fiber. In holding outside employment or self-employment, employees should ensure that participation does not conflict with responsibilities to Ziply Fiber or its business interests. Diverse Workforce /

EEO:

Ziply Fiber is an equal opportunity employer. Ziply Fiber will consider all qualified candidates regardless of race, color, religion, national origin, gender, age, marital status, sexual orientation, veteran status, and the presence of a non-job-related handicap or disability or any other legally protected status. Ziply Fiber requires a pre-employment background check as conditions of employment. Ziply Fiber may require a pre-employment drug screening. Ziply Fiber is a drug free workplace.