There is a direct train connection between Schiphol International Airport and Eindhoven Central Station. The trains usually depart from platform 1 or 2, but last minute changes are possible. Train schedules are available online. Notice that after 19.46 there are no direct trains and one transfer is required at Utrecht Central Station. In any case the journey will not last longer than 1,5 hour, although delays can happen.
Eindhoven Airport is located some five km outside the city of Eindhoven. From the airport there are various public transport options available to reach TU/e Science Park conveniently. Next to the terminal is the bus stop from which bus 400 or 401 will take you to Eindhoven Central Station within some 20 minutes. From Eindhoven Central station (southern exit) to TU/e Science Park is at some eight minutes walking distance. From Eindhoven Central station you can go by walk or with bus line 104 to TU/e Science Park.
If you do come by car, ANWB signposts on all motorways to and around Eindhoven (A2, A50, A58, A67 and A270) will indicate the direction Centrum, until Universiteit / TU/e Science Park is indicated. Inspect the route descriptions. Please be aware that parking is not free, to leave the campus you have to pay with the ticket you get upon entering, so take some change with you.