Ventajas
Lockheed Martin is a large company and therefore there is a lot of opportunity. There are diverse career fields with an opportunity to work on diverse programs. There is an opportunity to work in several geographic locations, particularily on the East coast and in California.
Desventajas
My experience is tempered in that LMC at my location is actually quite small, and therefore suffers from the problems that small companies have. Managment at my location is poor. Too much drama in the program. No one communicates. Subcontractors are in all the critical positions; LMC personnel are not in a position to make decisions. Hence low morale and high turnover. LMC as a corporation stresses that education and training is very important, but at my location there is no budget for training and there is very little opportunity for either unless it is done on your personal time.