Bertha Alvarez Manninen is a philosophy expert, with work primarily in bioethics, applied ethics, philosophy of religion and philosophy and film.

Manninen's research work includes applied ethics, biomedical ethics, normative and meta-ethics, social and political philosophy. Her work has been chronicled in such prestigious peer-reviewed professional publications as the American Journal of Bioethics, Philosophy, Ethics, and Humanities in Medicine, Hypatia, Journal of Social Philosophy, International Journal of Applied Philosophy, and the Journal of Medical Ethics.