Born and raised in Iran, David Nissan, a specialist on Iran and the Middle East, has a B.A. in Middle-Eastern Studies and an M.A. In International Relations from the Hebrew University of Jerusalem. For 16 years, he served as officer and commander in the Israeli Defense Forces, and another 7 years as a consultant for the Ministry of Defense. He also worked as an Iran analyst for 4 years for Terrogence, Israel's leading company for the collection and analysis of security/terror-related intelligence from the internet. He is completely fluent in English, and has given lectures in leading companies and financial institutions in the private sector, universities, and government ministries including the Ministry of Defense, the Ministry of Foreign Affairs, and the Prime Minister's Office. He has been interviewed on Israeli national radio and television. David edited the Middle East and Iran Newsletter, has spoken at various events in other countries, and is on the keynote speakers list of the London Speaker Bureau.

Terrogence specializes in the collection, translation and analysis of web-based intelligence.