Mark Jeffrey

Mark Jeffrey is a serial entrepreneur and author with Harper Collins. Most recently, Mark founded Guardian Circle and the GUARDIUM Token for global decentralized emergency response (One of FAST COMPANY's 'World Changing Ideas' 2018; Winner: CoinAgenda, d10e, LAUNCH Festival; Partner: XPRIZE Foundation) He is also an early pioneer of blockchain technology, having published BITCOIN EXPLAINED SIMPLY (2013) and THE CASE FOR BITCOIN (2016). 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 (co-founded with Kevin Pollak and Jason Calacanis). He was the founding CTO of Mahalo / Inside.com (backed by Elon Musk, Sequoia, Mark Cuban and others). Mark also worked with Travis Kalanick (CEO Uber) on his first company Red Swoosh. Mark has been named one of '50 to Watch' by Variety magazine and presented at the very first Harvard Conference on The Internet and Society. Mark was one of the first three people ever to podcast a novel: MAX QUICK originally received over 2.5 million downloads in 2005. His 2014 TEDx talk on Bitcoin has been viewed more than 50,000 times.