Markey faces up to 20 years in prison when she is sentenced in July.
Markey is an internationally known speaker. She was fired in 2006 as director of the archdiocese's family life office after an audit found irregularities.
The audit found that Markey spent $307,545 for her own use or without documentation. Prosecutors say Markey used the money to cover gambling forays, gifts and trips.
