Principal Numbering & Interconnection Specialist

ABOUT SINCH

Sinch is pioneering the way the world communicates. More than 150,000 businesses - including Google, Uber, Paypal, Visa, Tinder, and many others - rely on Sinch’s Customer Communications Cloud to power engaging customer experiences through mobile messaging, voice, and email.

Whether you need to verify users or craft omnichannel campaigns, Sinch makes it easy. Our AI-infused Super Network, APIs, and applications ensure you can connect with your customers reliably and securely, at every step of their journey.

At Sinch we “Dream Big”, “Win Together”, “Keep it simple”, and “Make it Happen”. These values are our foundation!

Sinch Voice empowers cloud communications for service providers and enterprises over the largest and highest quality independent voice network in North America, with over 125 million numbers in service and carrying over 300 billion voice minutes annually. Through our IP-based network and cloud communications platforms, Sinch Voice offers a variety of solutions for service providers and enterprises as they seek to evolve their communications to the cloud and improve their customer engagement. DESCRIPTION The Principal Numbering & Interconnection Specialist will serve as a subject matter expert for Sinch’s numbering and interconnection operations, overseeing the administration of company codes and numbering resources, ensuring accuracy and integrity of industry routing databases such as the LERG and BIRRDS, managing numbering inventory and utilization, and supporting wholesale customers with numbering and routing requirements. This role will also provide expertise in interconnection agreements, monitor regulatory developments and industry requirements, and ensure Sinch remains compliant with evolving numbering and interconnection obligations.

• Code Administration: Own the lifecycle of our company identifiers. OCN and company code assignment and maintenance through NECA, ACNA and CIC administration, CLLI creation through iconectiv CLONES.
• Numbering Resource Management: Mastery of the process of filing and managing NPA-NXX code applications and thousands-block applications through NANPA, including Part 1, 1A, 1B, 3, and 4 handling, forecasting, months-to-exhaust justification, and state commission approvals where numbering authority is delegated.
• Routing Data Integrity: Oversee and maintain accuracy in BIRRDS and the LERG across LRN assignment and mapping, switch and tandem homing, rate center and LATA assignment, and OCN relationships. Manage activation dates against the LERG publication cycle and drive code opening through to other carriers loading the code. Work with internal teams and customers to implement customer routing setups and troubleshoot
• Inventory & Utilization: Ability to reconcile number inventory against LERG, NPAC, and NANPA records. Ability to file semiannual NRUF reports, forecast utilization, and respond to audits and reclamation notices.
• Customer Data Assurance: Work directly with wholesale customers to confirm their numbering assets are correctly represented in industry databases. Review OCN and SPID alignment, rate center and LRN assignment, and block records at onboarding and on an ongoing basis. Own resolution of routing failures traced to record errors, and correct the upstream cause.
• Interconnection Expertise: Act as an authority on Section 251 and 252 interconnection. Interpretation and compliance of our existing agreements, monitor inbound carrier notices for copper retirement, network change, and discontinuance.
• Regulatory Foresight: Track FCC and state proceedings that change numbering and interconnection obligations. Brief leadership on timelines and exposure, and support comments, reply comments, and exparte filings.

REQUIREMENTS

• 10+ years in numbering, interconnection, code administration, or carrier regulatory operations at a carrier, wholesale provider, or interconnected VoIP provider.
• Hands-on filing experience with NECA company code administration, NANPA, and NRUF.
• Fluency in LERG and BIRRDS routing data, with the ability to trace a call failure to the record that caused it.
• Working knowledge of Section 251 and 252 interconnection and interconnection agreement structure.
• Awareness of carrier filing obligations, including Forms 499 and 477, USF, the Robocall Mitigation Database, STIR/SHAKEN, and state certifications, and of intercarrier compensation under bill-and-keep.
• A demonstrated habit of following FCC and state proceedings.
• Clear written communication, including the ability to reduce a rulemaking to a one-page brief.
• Composure in customer-facing work
• Experience at a wholesale carrier or carrier’s carrier serving other providers rather than end users.
• Experience supporting customers through their own direct access numbering authorization.
• Participation in NANC working groups and ATIS committees.

This is a remote opportunity, but candidates must reside near one of our hub locations for occasional collaboration: Atlanta, GA; Chicago, IL; San Antonio, TX; Denver, CO

Benefits

• STAY HEALTHY: We offer comprehensive market competitive medical, dental, and vision plans. A variety of supplemental plans are also provided to meet your individual needs including access to telehealth for all participants.
• CARE FOR YOURSELF: Take advantage of our free virtual counselling resources through our global Employee Assistance Program. Your mental health is as important as your physical health.
• SECURE YOUR FUTURE: Plan for your future with our Roth and Pre-tax 401(k) options including an employer match for all participants.
• TAKE A BREAK: Enjoy a generous paid time off program. We value balance and understand that performance at work requires time to rest at home and/or rejuvenate on vacation.
• PUT FAMILY FIRST: We know that families can be built in a variety of ways; therefore, we offer paid parental leave and family planning support.
• WORK WHEREVER: Our flexible remote work offerings allow you to work wherever you are the most productive and successful. It is what you do, not where you work, that matters.
• MAKE AN IMPACT: Support betterment in your community and beyond by taking paid time off to support a volunteer program of your choice.

The annual starting salary for this position is between $123,000 - 155,000. Factors which may affect starting pay within this range may include geography/market, skills, education, experience, and other qualifications. This role will be accepting applications until November 16, 2026 at a minimum. Please note that the application timeline may be flexible to accommodate a comprehensive candidate evaluation.