Pros
I was able to rotate through a number of interesting positions over the course of a decade. Some really good people. Large number of contracts ensures the company will survive. Great if you're former military. Entrepreneurial bent.
Cons
Going public was a disaster. The culture changed and a lot of long time employees who thought they'd get rich when the company went public endied up losing a lot of money. The company seemed to have more than its share of mini-scandals and there were a number of attractive women in various management positions who'd 'worked' their way up from administrative assistant type positions. It was kind of an open secret and a running joke. One very senior manager was sent packing when his extra-curricular activities were uncovered. A lot of employees that I was around were worked to the bone: a stroke, a massive heart attack and a nervous breakdown all felled people that I worked around because of the unyielding pressure. 2 guys in their early 50s, 1 in his early 40s.