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Mark Castleman

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Mark Castleman
Mark Castleman is global telecom executive specializing in corporate and product strategy. Over the years, Mark’s expertise has formed around enterprise communication, information sharing, customer onboarding and business process. Mark has led strategy and innovation for Cerebri-AI, Avaya, Bell Labs/Alcatel-Lucent, and PBX Central where his products and innovations have touched millions of users. Mark has a passion for building companies and is an active startup investor as well as founder of multiple startups.