Location: Brooklyn, NY
Duration: 1 Year Contract
Work Type: On-site/Hybrid (as required)
The NG911 Telephony SME will be responsible for overseeing and validating all telephony-related aspects of the Next-Generation 9-1-1 system implementation. This role ensures that system architecture, integrations, testing, and call-routing workflows align with NG911 standards and operate as expected across all operational sites.
The selected consultant will:
Manage and oversee execution of all telephony components within the NG9-1-1 system.
Ensure adherence to telephony policies, procedures, and best practices throughout system implementation.
Validate all telephony configurations during deployment.
Develop and provide test cases for System Acceptance Testing (SAT) and System Integration Testing (SIT).
Identify risks associated with telephony integrations across system components.
Validate test results for telephony functions by comparing architectural flows with raw system outputs.
Support testing, troubleshooting, and cutover events involving mission-critical voice infrastructure.
(Candidates without the mandatory skills will not be considered.)
12+ years of experience in a specialized technical area involving telephony, NG911, network signaling, or similar enterprise communication systems.
Experience developing and maintaining call-flow diagrams, signaling validation scripts, and interoperability matrices.
Ability to collaborate with cross-functional technical teams (e.g., MSCI, vendors, telecom carriers) to resolve signaling, interoperability, and audio issues.
Strong background supporting testing and cutover events for critical voice systems.
Deep understanding of NENA standards STA-010, STA-012, STA-019 for call routing and workflows.
Hands-on expertise configuring and analyzing SIP messages, SDP negotiation, trunk performance, and gateway behaviors.
Experience maintaining ESRP, BCF, and CHS mappings for voice, text, and multimedia sessions.
Knowledge of ECRF/LVF-based routing for location-enabled dispatch.
Ability to work with network engineers on ESiNET-level QoS, DSCP tagging, and failover routing.
Experience validating private IP trunk services and carrier connectivity.
Ability to support redundancy testing and performance benchmarking across multiple sites.
Skilled in analyzing SIP traces, CDRs, and packet captures to validate behavior under production load.
Experience developing test scripts, verification plans, and production readiness documentation.
Excellent written, verbal, and interpersonal communication skills.
Experience in public safety, emergency communications, or 9-1-1 operational environments.
Expertise in IP voice management, system auditing, and monitoring.
Familiarity with logging and recording solutions for legacy and IP-based PBXs.
Ability to work collaboratively with internal teams and external partners across multiple service domains.