Located within the heart of Chester County, Pennsylvania, IES’ main office is located within the city limits of West Chester and 25 miles west of Philadelphia. Due to our pro-activeness and efficient mobilization, we are happy to accept projects in many markets! Below shown is our typical area of work map, but can travel further upon your needs. 


We can  cater to your needs as we are a licensed professional engineering firm within Delaware, Maryland, New Jersey, and Pennsylvania.  We also have associates that are licensed to the rest of the Contiguous United States.