Mark Jeffrey

Mark Jeffrey is an award-winning serial entrepreneur and author with Harper Collins. Most recently, Mark founded Guardian Circle community emergency response network (Newsweek Blockchain Impact Award (2019), One of Fast Company's 'World Changing Ideas' 2018; Partner: Xprize Foundation; Featured in Trust Machine, The Rise of Blockchain. He is also an early pioneer of blockchain technology, having published Bitcoin Explained Simply and The Case For Bitcoin. His previous companies include The Palace (backed by Time Warner, Intel and SoftBank; sold with 10 million users), ZeroDegrees (a business social network sold to InterActiveCorp IAC in 2004 with 1 million users) and ThisWeekIn (video network). He was the founding CTO of Mahalo / Inside.com (backed by Elon Musk, Sequoia and others). Mark was one of the first people to ever podcast a serialized novel: Max Quick: The Pocket and the Pendant received over 2.5 million downloads in 2005. Mark Jeffrey holds a BS in Computer Science from the University of New Hampshire. On Twitter, he is @markjeffrey.