Ventajas
First, it will look good on your resume when applying for another job. Little that they know, Lockheed Martin is not as good as it is on paper.
Desventajas
The location where I was at is a glass ceiling. I believe that there is too many managers. Most of the actual workers find themselves asking each other "what's that manager's job again?!" There is a deputy to a deputy for a deputy. I started as a non-degree holder for a position. The pay was "better than nothing." But after getting my higher education, there's just no place to move up into. Three other employees who have graduated from MBA program left as well. All MBA has been paid for by Lockheed Martin. After six months of graduating, they all left. LM changed the policy to 1-year, so I stayed for a year and left as well. Months after I left, there were layoffs. That's one of the reason why I left, too. I knew that there would be layoffs. As much as I love my manager and the people I worked with, I had to go.