Father Lynch was ordained May 13, 1989 and served his first assignment as parochial vicar at St. Mary Cathedral, Miami. In September 1990 he became chaplain of the Coral Gables Fire Department, and in December 1991 he was named parochial vicar at St. John Neumann in Miami. In January 1995, he moved to St. Vincent in Margate, and in November 2001 to St. Ambrose in Deerfield Beach. He was named administrator of Blessed Sacrament Church, Fort Lauderdale, in January 2005 and pastor in April 2006. Since September 2009 he has been serving as parochial vicar at St. Ambrose, Deerfield Beach.