Shay Cullen, SSCME (born 27 March 1943) is an Irish Catholic missionary priest and the founder of the PREDA Foundation.

He is a member of the Columbans, an Irish order founded in honour of and named after Saint Columbanus.

He was educated near his home at Harold's Boys by the Presentation Brothers in Glasthule, and CBC Monkstown Park.

This small non-profit organisation has a number of purposes, including the promotion and protection of the human rights of the Filipino people, especially women and children.

PREDA cooperates closely with international legal tribunals, Interpol and the UN Commission on Human Rights.