Mark Clancy is an accomplished cybersecurity professional with extensive experience in leadership roles across various organizations. Currently serving as Chief Security Officer and Senior Vice President of Cybersecurity at T-Mobile from April 2023 to June 2025, Clancy has also contributed as an advisor to Sunday Security's CISO Advisory Board from March 2022 to October 2023. Prior to this, Clancy founded Cyber Risk Research LLC and held the position of Chief Executive Officer at The Authoriti Network, Inc. between August 2020 and December 2021. Clancy's earlier experience includes serving as Vice President of Cybersecurity and CISO at Sprint from July 2018 to August 2020, where responsibilities included leading cybersecurity and fraud initiatives. Clancy holds a Bachelor of Science degree in Electrical and Electronics Engineering from Drexel University, earned between January 1987 and January 1992.
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