Founded in 1999, MacIntosh Engineering, formerly known as O Donnell, Naccarato & MacIntosh, is a full-service firm that serves clients in the educational, government, municipal, institutional, architectural and construction industries. The firm offers a range of structural engineering solutions. It serves customers in Delaware, Pennsylvania, New Jersey and Maryland. MacIntosh Engineering works with a team of more than 30 staff members. It offers parking garage design and facade restoration solutions. The firm provides services for airports, automobile dealerships, banks, churches, hotels, medical facilities and retail stores. MacIntosh Engineering has undertaken projects for the Tatnall School Performing Arts Center, Talley Middle School and Appoquinimink High School.