Lynch attended the Christian Brothers' School in Ireland and began serving as an altar boy in the local Catholic church when only eight years old. In 1965, Lynch joined the Society of African Missions (SMA). In 1982, Lynch founded the first AIDS ministry in New York City with
Dignity USA (New York Chapter) as documented in the documentary films AIDS: A PRIEST’S TESTAMENT in 1987 and SOUL SURVIVOR in 1990. Lynch publicly testified in favour of New York City’s lesbian and gay rights
bill that bans discrimination based on sexual orientation in jobs and public accommodations, seeing it through to passage by the New York City Council in 1986. In 1988, Lynch was indicted for child sex abuse alleged to have occurred at
Mount Saint Michael Academy in
The Bronx in the mid 1980s. Lynch won total exoneration from Justice Burton Roberts in Bronx Supreme Court. As alleged in the documentary film
A Priest on Trial, Lynch's support for LGBT rights brought down on him a false prosecution perpetrated by Church and government officials. In November 2022, it was announced that the
National Library of Ireland has acquired the personal papers from Lynch. The Fr Bernárd Lynch Collection represents the personal and public life of Lynch. Comprising letters, postcards, newspaper clippings, and legal testimonies, the archive spans more than 50 years. == Personal life ==