Advanced knowledge of telecommunications, identity, and security technologies, including SIP (Session Initiation Protocol), DNS (Domain Name System), HTTP (Hypertext Transfer Protocol), SSL (Secure Sockets Layer), STIR/SHAKEN, OAuth 2.0, session border controllers, cryptography, encryption, PKI (Public Key Infrastructure), authentication, and authorization. 15+ years of progressive experience in solutions architecture, systems design, software engineering, product development, or technology consulting, including experience designing and delivering complex solutions for telecommunications carriers or large enterprises.