Lead architecture and design of enterprise voice and VoIP solutions across on-premise, hybrid, and cloud environments.Define and execute migration strategies from legacy PBX/Cisco UC platforms to Microsoft Teams Telephony.Architect SIP trunking solutions, including secure TLS/SRTP communications between enterprise platforms.Serve as the senior technical authority for voice call flows, signaling, and cross-platform interoperability.Design and implement Session Border Controller (SBC) architectures (Cisco CUBE, Oracle SBC, etc. ).Ensure secure voice architecture including certificates, encryption, firewall traversal, and compliance requirements.Integrate voice services across LAN/WAN, SD-WAN, and cloud network environments with proper QoS and prioritization.Perform capacity planning and traffic analysis to ensure scalability, resiliency, and performance.Provide Tier 3 escalation support for complex VoIP, SIP, and gateway issues.Develop architectural standards, roadmaps, and lifecycle strategies for enterprise voice services.Deliver executive-level technical briefings and mentor engineering teams.Basic QualificationsBachelor s degree in Engineering, Computer Science, or related field (Master s preferred).10-15+ years of experience in enterprise voice/VoIP engineering or architecture.Proven experience supporting large-scale telephony deployments and migrations, including Cisco to Microsoft Teams Telephony.VoIP Protocols & Standards: Expert-level understanding of SIP, RTP/RTCP, H.323, and codec technologies (G.711, G.729, Opus).Networking Fundamentals: Strong knowledge of TCP/IP, VLANs, QoS, MPLS, SD-WAN, and routing protocols (BGP, OSPF) for voice traffic prioritization.Platforms & Vendors:Cisco Unified Communications Manager (CUCM)Cisco Unified Border Element (CUBE) / SBCsMicrosoft Teams TelephonyExperience with Avaya or similar enterprise voice platformsSIP & Security:SIP trunk configuration (Cisco & Microsoft environments)TLS/SRTP implementationCertificate management and PKIFirewall traversal and rule implementationStrong troubleshooting skills using protocol analyzers (SIP traces, packet captures, call flow analysis).Preferred Qualifications Experience with That's why we craft compensation packages that reflect the importance of the work we do for our customers. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at [email protected]. If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission.
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