Telephony SME

Title: NG911 Telephony SME

Client: NYC Agency

Location: Brooklyn, NY (Onsite)

Duration: 11 Months  

Working Hours: 35 Hours per Week

Job Description: 

• Manage and oversee the 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 being met throughout the implementation of the NG9-1-1 system.
• Validate telephony configurations during the NG9-1-1 system 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 the NG9-1-1 system during SAT and SIT, review applicable architectural flows, and compare with raw test results to ensure the system behaves as expected.

Mandatory Skills

• Minimum 12 years of experience in a particular technical and/or business application, product, platform, or methodology.
• Develop and maintain call-flow diagrams, signalling 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, signalling, 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 the 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 PBX’s.
• Industry experience to interact fluently w/ both internal and external partner organizations across variety of services and troubleshooting sessions.