Great place to start your career and diversify your skills, but beware of the defense industry.
Pros
Lots of opportunities to rotate into different areas of the company. International company, lots of resources and good process guidelines. Great place for a young person to learn the ropes from older and retiring engineers. Lockheed puts a lot of emphasis on hiring a diverse workforce.
Cons
While Lockheed tries hard and implements good anti-discrimination policies, the culture is still pretty conservative, especially at the higher levels. Granted, things have changed a lot since the 90's and much more diverse people are climbing the ranks into top management. It still has a way to go. Also, if you don't like the aerospace/defense industry, then none of the defense contractors (Lockheed, Boeing, Raytheon, Northrop) are a good place for you to work.