During the past decade Tsahi has taken part in the development of various VoIP and 3G projects as a programmer, manager and marketer. This included developing the 3G-324M protocol stack from scratch, as well as managing the team that was in charge of developing and maintaining the H.323 protocol stack. In addition to his work at RADVISION, he has an MSc in Computer Science and an MBA degree with a focus in Entrepreneurship and Strategy. Tsahi has been granted two patents related to 3G-324M call optimizations, and acts as the chairman of the IMTC IMS Activity Group, which focuses on interoperability issues relating to IMS client.

Currently Tsahi is taking part in the development of RADVISION's innovative video client in cooperation with Samsung and participates in RADVISION's Developer Community efforts. Tsahi also blogs regularly at VoIP Survivor and on Talking Video.

When he is not working and blogging Tsahi enjoys playing with his daughter Grace, developing new culinary innovations in his suburban Tel Aviv kitchen, and practicing Argentinean Tango with his lovely wife.

You can follow Tsahi on twitter.