Senior Telecom Engineer

Hybrid 4 days onsite in either Boston, MA or Woodbridge, NJ

The organization is modernizing its telephony stack and requires a Senior Telecom Engineer to lead the evolution to a resilient, cloud-enabled collaboration ecosystem. The role spans architecture, operations, and Tier 3 support across Avaya, Five9, SIP/PSTN, contact center, and integrations to deliver secure and scalable voice services.

We can facilitate w2 and corp-to-corp consultants. For our w2 consultants, we offer a great benefits package that includes Medical, Dental, and Vision benefits, 401k with company matching, and life insurance.

Rate: $50.00 to $55.00/hr. w2

Responsibilities

• Own end-to-end voice, UC, and contact center architecture including dial plans, call routing, auto attendants, hunt groups, voicemail, video, and fax.
• Define, document, and enforce configuration standards, security controls, versioning, and e911 policies across platforms and sites.
• Lead design reviews for contact center solutions including IVR, scripting, call flows, workforce engagement, recording, and quality management.
• Engineer resiliency including survivable branch telephony, SBC high availability, QoS and VLAN design, and perform capacity planning.
• Execute installations, upgrades, migrations, MACD, and integrations; maintain patches, backups, disaster recovery runbooks, and platform hygiene.
• Provide Tier 3 diagnostics and resolution for complex voice, video, and collaboration incidents including SIP signaling, media, QoS, SBC, and gateway issues.
• Administer and optimize PSTN and SIP trunking, number administration and porting, carrier services, and related policies.
• Monitor and troubleshoot using CDR, call tracing, network monitoring tools such as Wireshark and SolarWinds, and vendor consoles.
• Support and transition legacy platforms toward UCaaS and CCaaS; document cutover plans and decommissioning.
• Design and optimize IVR/IVA and call flows, routing, self-service, and KPI and experience outcomes.
• Oversee integrations with CRMs, third-party applications, REST APIs, .NET, recording and quality platforms, paging, and analytics.
• Provide program leadership for Five9 or similar platforms, track roadmaps, SLAs, and adoption.
• Maintain comprehensive runbooks, SOPs, diagrams, and inventories including dial plans, IP schemas, and QoS policies.
• Deliver technical and administrative training and knowledge transfer to IT, Telecom teams, service desk, and end users.
• Partner with Network, Information Security, Service Desk, PMO, and Call Center leadership to ensure secure, scalable, and integrated services.
• Manage vendors, OEMs, and carriers and drive root cause analysis and problem management to prevent recurrence.

Experience Requirements

• 5+ years in enterprise voice infrastructure, UC and contact center architecture, and voice systems administration and operations.
• Demonstrated breadth across UC and CC domains including UC, CC, SIP, dial plans, and CDR and call tracing.
• Strong experience with Avaya platforms including Communication Manager, System Manager, Session Manager, Aura messaging and conferencing, and CMS.
• CCaaS experience with Five9, NICE, Verint, or similar.
• Hands-on experience with Teams Phone, Zoom Phone, or other UCaaS platforms.
• Expertise in SIP trunking, carrier services, number porting and administration, and PSTN policies.
• IVR or Studio scripting, call flow design, and functional workflow development.
• Practical knowledge of REST APIs and .NET for integrations with application teams.
• Networking fundamentals for voice including SIP and H.323, RTP, QoS, VLAN tagging, DHCP, DNS, SNMP, and LAN or WAN interoperability.
• Knowledge of resiliency concepts such as SRST or equivalent remote survivability, SBCs, and voice gateways.
• Experience with end-user voice services including physical phones, softphones, ATAs, remote worker scenarios, and CDR or call reporting.
• Strong communication, documentation, stakeholder engagement, and vendor management skills.
• Experience with security and compliance for UC and CC including E911, audit readiness, call recording retention, and privacy.
• Familiarity with data and voice cabling standards and data center practices including rack layout, power, and fiber or copper termination.

Education Requirements

• Bachelor’s degree in Computer Science, Information Systems, or equivalent experience.

Recruitment Transparency Notice

Eliassen Group values transparency in our recruitment practices. Please be advised that Eliassen Group utilizes artificial intelligence (AI) tools as part of its initial application screening and hiring process. You may receive email and SMS notifications from the Eliassen Virtual Recruiting Team ( [email protected] , 781-808-2924) inviting you to complete a brief voice screening as part of your application process. These tools assist our hiring teams in different ways, including but not limited to, assistance in reviewing application materials to help identify candidates whose qualifications most closely match the requirements of the position. All AI-assisted evaluations and responses are reviewed by human recruiters before any hiring decisions are made. The use of AI in our process is intended to support fairness, efficiency, and consistency, and Eliassen Group takes measures to prevent bias or discrimination in connection with its hiring practices. By proceeding, you acknowledge, agree, and consent to Eliassen Group’s use of these tools, including AI tools, as part of the application and hiring process.

Skills, experience, and other compensable factors will be considered when determining pay rate. The pay range provided in this posting reflects a W2 hourly rate; other employment options may be available that may result in pay outside of the provided range.

· When you work with Eliassen Group, all email communication will come from an Eliassen.com address, never Gmail, Yahoo, etc.

· Eliassen Group will never ask you for personal information (home address, bank account, or check routing number) until you have worked with someone clearly associated with Eliassen Group.

If you have any indication of fraudulent activity, please contact [email protected] .

About Eliassen Group:

Eliassen Group is a strategic consulting firm that helps organizations reach further and achieve more through our technology, business advisory, and life sciences solutions. For nearly 40 years, we have combined exceptional people, deep domain expertise, and intelligent capabilities to expand our clients’ capacity and accelerate meaningful outcomes. We are driven by a purpose to positively impact the lives of our employees, clients, consultants, and the communities we serve.

Eliassen is committed to building a diverse and inclusive team from a variety of backgrounds, perspectives, and skills. We are an Equal Opportunity and Affirmative Action Employer and all employment decisions are based on merit, performance, and business needs. Eliassen does not discriminate on the basis of race, color, gender identity or expression, sexual preference or orientation, sex (including pregnancy, childbirth, and related medical conditions), marital status, creed, religion, physical or mental disability, genetic information, military or veteran status, age, ancestry, national origin, citizenship status, prohibited criminal record inquiries of applicants and employees, or any other category protected by federal, state, or local laws.

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