Cella M. Sum is an interdisciplinary researcher and Ph.D. student at Carnegie Mellon University's Human-Computer Interaction Institute. She is advised by Dr. Sarah Fox.

Her research focuses on technology, power, and resistance in labor contexts. She has looked into how ethnic community-based organizations negotiate disempowering data and tech practices, how workers resist surveillance technologies, and how and why tech workers unionize across the tech industry. Using community-based participatory design methods, she works with affected communities to co-create more just alternatives.

Cella holds a Master's degree in Human-Computer Interaction and Design from UC Irvine and a BS in Computer Science from Shippensburg University. She is a former tech worker organizer with Big Cartel Workers Union and has over 15 years of industry experience in software engineering, UX research, and design.