Mayank Dhiman

Mayank Dhiman is a security professional with extensive experience in various roles within the cybersecurity field. Currently serving in a security position at Sierra since August 2025, Mayank previously worked at Notion as the Head of Security Engineering, focusing on infrastructure security, product security, and privacy engineering. Prior to that, Mayank was a Security Engineer at Dropbox, where responsibilities included leading infrastructure hardening and Zero Trust initiatives. Mayank's career also includes positions at Cequence Security, UC San Diego as a graduate student researcher, and internships at Facebook, PayPal, and EURECOM. Education includes attendance at UC San Diego for a PhD in Computer Science, although Mayank did not complete the degree.