I’ve known Mark for over four years and been involved in his lean start-up weekends as well as Xcell Partners incubator/accelerator activities, in which I’ve witnessed how great he is at motivating, inspiring and educating entrepreneurs about the difficulties of starting and growing a new business venture. Mark’s enthusiasm for such people and their ideas, yet with a good dose of realism from his own experience in Silicon Valley, makes him excellent at leading workshops (e.g. business model canvas, business plan writing) and at evaluating business plans of the CEOs he mentors.