Vantaggi
Before the recent nationwide meltdown in the financial industry, the company was stable, predictable and generous with salaries. Even now, while it may be risky to be in upper management, directors and lower levels are still secure & safe jobs.
Svantaggi
Despite several years of attempted culture change, middle management is still obsessed with empire building rather than the well-being of their employees or the company. Change is resisted. Skills sharing between teams is actively discouraged even while lip service is paid to its importance. Technical skillsets are restricted to silos: network people will never be allowed to touch an operating system, UNIX people can't look at SAN systems, SAN people can't touch monitoring systems, etc..