Mark Jeffrey is a Published Author at Harper Collins. He possess expertise in entrepreneurship, e commerce, social networking, mobile devices, social media and 41 more skills. Colleagues describe him as "Although I've known Mark via LA tech circles for well over a decade, I've only recently gotten to know and respect him professionally speaking together on numerous cryptocurrency panels and watching the evolution of his Guardium Token offering. Guardiam is the first decentralized emergency response platform that "flash organizes" trusted emergency responders via mobile phone rather than waiting for 9-1-1 dispatch. Mark is a true visionary and innovator." and "I had not just the pleasure, but the honor, of working with Mark very closely for just more than a year. His input, counsel and breadth of knowledge quickly made him one of my most trusted colleagues and treasured partners. Mark is a genuine technology renaissance man. He has been part of the digital era since its very beginnings, taking on successive challenges that have pushed the boundaries of consumer experiences and thereby entrenched Mark as a perennial leader in the Southern… Show more"