I worked for a "huge well-known bank" as a data center engineer. Unfortunately, they had converted all the FTE positions to contractor. As a contractor, you had as much job security as a slab of meat. All new contractor hires were given a copy of "Who Moved My Cheese" to read. In 32 years of working, I've never seen a place with a higher turnover rate. It was sad because the job itself was pretty nice, just nothing else about it was.
