Michael Chappell

As CTO, Defense at Appian, Michael Chappell leads the company’s Department of Defense portfolio, with a particular focus on the US Army. Before joining Appian, he served as Assistant Program Executive Officer for the CIO at the Army’s PEO Enterprise Information Systems, where he directed technical strategy and product domains spanning AI, cloud, and cybersecurity. With over 18 years' experience supporting DoD and federal agencies, Michael has led the development of advanced data analytics platforms and advised Army CIO leadership on enterprise IT. Since 2010, he has supported the Army in contractor roles, including as a Global Solutions Architect at Ernst & Young, where he spearheaded data quality efforts, and at Accenture, where he specialized in analytics and IT infrastructure. Michael holds a degree in Mechanical Engineering from Virginia Tech.