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# Senior NG911 Telephony Engineer - NENA Standards & Interoperability SME

- **Company:** TRYFACTA, INC.
- **Location:** New York, NY, United States
- **Experience:** Expert
- **Contract:** Temporary contract
- **Skills:** VoIP, Business Software, Interoperability, Data Logging, Test Scripts, Cisco
- **Published:** November 10, 2026
- **Apply:** https://www.dice.com/job-detail/d9c81716-4787-4633-bc39-3b73375e0e50

## About the Role

* Excellent business writing, communication and interpersonal skills.
 * Knowledge of public safety environments.
 * Design skills in IP voice management, auditing and monitoring.
 * Knowledge of logging and recording technologies for legacy and IP PBXs.
 * Experience working with internal and external partner organizations across services and troubleshooting sessions.

## Description

* Ensure NENA and APCO standards are met during the NG9-1-1 implementation.
 * Turn business needs into detailed requirements or user stories, and lead prioritization and validation with the project teams.
 * Conduct stakeholder analysis for requirements elicitation.
 * Plan elicitation tasks, activities and timelines.
 * Review and assess the adequacy of NYC's Call Handling requirements.
 * Engage public safety and stakeholder agencies on their needs, issues and concerns.
 * Incorporate applicable federal, state and professional-organization standards and guidelines for NG911.

Mandatory skills/experience (candidates without these won't be considered)

 * Minimum 12 years of experience in a 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.
 * Work with MSCI, Client, NICE, Cisco and telecom carriers to resolve interoperability, signaling and audio-quality issues.
 * Support testing, troubleshooting and cutover events for critical voice infrastructure.
 * Design and validate call routing workflows per NENA STA-010, STA-012 and STA-019.
 * Configure and analyze SIP messages, SDP negotiation and trunk performance across Clients and gateways.
 * Maintain mappings between ESRP, BCF and CHS components for voice, text and multimedia calls.
 * Ensure correct ECRF/LVF call routing for location-based dispatching.
 * Work with network and integration engineers on 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 behavior under load and failover.
 * Work with the Lead Test Engineer on test scripts and call-flow verification plans for production readiness.