 Westchester County Executive Andrew O'Rourke appointed Astorino to the Westchester County Board of Ethics in 1996.Astorino was reappointed by O'Rourke's successor, Andy Spano in 1999.In 2003, Astorino announced he was a candidate to replace retiring County Legislator Sue Swanson, who represented a district encompassing Mount Pleasant, Pleasantville, North Castle, West Harrison, and portions of northern Greenburgh.