Animal Experimentation:  Litigation, Activism, and Ethics


Kathy Guillermo, Vice President

Laboratory Investigations, PETA

PETA Senior Vice President of Laboratory Investigations Kathy Guillermo is responsible for uncovering abuses in laboratories, working with whistleblowers to expose violations of animal protection laws, seeking prosecution of animal abusers by federal and state agencies, and replacing animals in laboratories with modern, non-animal methods of experimentation. A veteran of PETA, Kathy was originally hired to head PETA’s cosmetics-testing campaign in 1989 and spearheaded efforts to persuade major corporations—including Estée Lauder and Gillette—to declare permanent bans on all animal tests.

Kathy’s 1993 book Monkey Business: The Disturbing Case That Launched the Animal Rights Movement details the cruelty case that first brought then-fledgling PETA into national prominence. The landmark Silver Spring monkeys case also led to the first-ever conviction of an animal experimenter on cruelty-to-animals charges.

Kathy is a graduate of the University of California at Berkeley. She is married and has three children and five rescued dogs.