NG911 Telephony SME

Largeton Group; New York (NY); On-site; USD 120,000 - 150,000; Full time

Job summary

A technology consulting firm seeks an experienced NG911 Subject Matter Expert (SME) in Brooklyn, NY, to oversee the implementation and configuration of the Next Generation 9-1-1 emergency call system. Ideal candidates will have at least 12 years of technical experience, be skilled in SIP configurations, call routing workflows, and able to perform detailed testing and validation of telephony integrations. The role involves collaborating with telecom carriers and ensuring quality for voice infrastructure systems. Contract role with on-site requirements.

Qualifications

• Minimum 12 years of experience in a relevant technical field.
• Ability to develop and maintain call-flow diagrams and signaling validation scripts.
• Experience with SIP messages, SDP negotiation, and multi-carrier connectivity.

Responsibilities

• Manage execution and delivery of telephony components for the NG9-1-1 system.
• Ensure policies for telephony systems are followed during implementation.
• Validate telephony configurations and test cases during implementations.

Skills

SIP message configuration

Call routing workflows design

Interoperability issue resolution

Telephony configurations validation

Troubleshooting critical voice infrastructure

Excellent communication skills

Job description

Location: On Site: 2 MetroTech Center, Brooklyn, NY 11201

Duration: December 29, 2025 - November 30, 2026

Job Title

NG911 Telephony SME

Job Description

This request is for a NG911 Subject Matter Expert (SME) needed to continue the project work for the Class 1/2/3 and Call Handling upgrades of the Next Generation 9-1-1 emergency call system and provide expertise and technical knowledge during the configuration and test phases.

Responsibilities

• Manage and oversee execution and delivery of all aspects of the telephony components of the NG9-1-1 system.
• Ensure policies, procedures, and best practices for telephony systems are met throughout implementation of NG9-1-1.
• Validate telephony configurations during implementation.
• Provide test cases for SAT and SIT; continue to identify risks associated with telephony integrations with the NG9-1-1 system.
• Validate test results for telephony components of NG9-1-1 during SAT and SIT, review applicable architectural flows, and compare raw test results to ensure system behaves as expected.

Mandatory Skills / Experience

• Minimum 12 years of experience in a particular technical and/or business application, product, platform, or methodology.
• Develop and maintain call-flow diagrams, signaling validation scripts, and interoperability matrices across PSAC I, PSAC II, and vendor sites.
• Collaborate with MSCI, Motorola, NICE, Cisco, and telecom carriers to resolve interoperability, signaling, and audio quality issues.
• Support testing, troubleshooting, and cutover events involving critical voice infrastructure.
• Design and validate call routing workflows per NENA STA-010, STA-012, and STA-019 standards.
• Configure and analyze SIP messages, SDP negotiation, and trunk performance across SBCs and gateways.
• Maintain mappings between ESRP, BCF, and CHS components for voice, text, and multimedia calls.
• Ensure correct implementation of ECRF/LVF call routing functions for location-based dispatching.
• Work with network and integration engineers to ensure ESiNET-level QoS, DSCP tagging, and failover routing.
• Validate carrier connectivity for private IP trunk services.
• Support call path redundancy testing and performance benchmarking between PSAC I, PSAC II, and NGCS vendor data centers.
• Analyze SIP traces, CDRs, and packet captures to validate system behavior under load and failover.
• Collaborate with Lead Test Engineer to develop test scripts and call‑flow verification plans for production readiness.

Desirable Skills

• Excellent communication and clear business writing skills as well as interpersonal skills.
• Knowledge of public safety environments.
• Design skills in IP voice management, auditing, and monitoring.
• Knowledge of logging and recording technologies and techniques for legacy and IP PBXes.
• Industry experience to interact fluently w/ both internal and external partner organizations across variety of services and troubleshooting sessions.

Seniority level

• Mid‑Senior level

Employment type

• Contract

Job function

• Other

Industries

• IT Services and IT Consulting