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Mark Contestabile has worked with Sentinel since 1997 in nearly every facet of Sentinel, including operations, sales, marketing and field services. For more than 15 years, Mark served as the Misdemeanant Services, Divisional President for Sentinel where he was responsible for the delivery of community-based programs and probation supervision on behalf of more than 100 courts nationwide. Since 2013, Mark has served as the Chief Business Development Officer where he provides hands-on leadership for Sales and Marketing.