Avantages
9/80 work schedule. Benefits. Potential security clearance which might lead to other work for more money for a competitor. If you want to be left alone, you can have that in spades. Many locations to choose from.
Inconvénients
After 12 years I've concluded that LM is a collection of units flying in very loose formation. One review here reports very helpful co-workers, I'm reporting the diametric opposite. It took 5 YEARS before I stood a 50% chance of getting my phone call returned. Ask for help - get "the hand." Every change the company has made lately either costs the employee more or reduces their chance for salary growth. Overtime is only paid for catastrophic situations where management blew the schedule. No training. No means of networking. No helping others with their tasks - that will burn up the budget. Once you're doing a specialist overhead task you are IT for the rest of your career. (my program is reported by others who have other experience to be especially chaotic and brutal. My program location is bogus. I'd get fired instantly for saying the above.)