Siani Pearson is a senior research engineer at Hewlett-Packard Research Labs, Bristol, UK, specializing in computer security, trust, and privacy. After obtaining a degree in mathematics and philosophy from the University of Oxford in 1988, she obtained an MSc in artificial intelligence at Edinburgh and, in 1992, a Ph.D. in the same field.
She worked for several years as a postdoctoral research fellow at the University of Cambridge before joining HP. She has published papers in a variety of fields from agent technology to online privacy. She is married with two daughters. Siani is featured in the "HP Invent" advertising campaign.