Leone Law Firm supports local San Francisco Bay Area organizations through donations, volunteering and free legal consulting. Leslie has also been a volunteer attorney and mediator for the Marin Superior Court, San Francisco Bar Association, Office of Citizen Complaints, and Legal Aid of Marin. She volunteers her time serving the poor, hungry and homeless at Glide Memorial Church and San Mateo County's Home & Hope. She works with children at the YMCA and supports the effort of St. Dorothy's Rest a hospital and summer camp that offers kids a safe and nurturing environment. She has provided hundreds of free legal consultations since beginning her practice in 1999.