I know it is early for most of the college mentors to be thinking about summer internships, but Lockheed Martin has already started posting their summer openings. If you are thinking you might want an internship - go to www.lockheedmartin.com, under careers/ college students. Lockheed has locations all across the US and some internships will allow you to come from different locations. If you have any specific questions shoot me an email and I will try to answer them for you as best I can. (ryan.leitch@lmco.com)
If you wait until after build to apply - then you most likely will not get an internship. They typically have made their summer intern selections by March.
Good Luck!