Mary Costello worked side by side with her husband Jim from the time he founded the Hawthorne Caballeros in 1946 until his passing. She continues to provide support to the corps. She is an active member of the board of directors, and has been instrumental in helping guide the direction of the corps for more than 50 years. Many of her contributions have been unpublicized, and not widely known outside the Hawthorne organization.
