Pros
I really geniunely like my coworkers. The workplace and the attaire requirements are pretty informal. People genuinely want to do a good job, and tend to overcome any obstacles to make sure that things are done correctly and ontime. The benefits (health, 401k, dental) are top notch, which makes it very difficult to want to leave this company. The company also really does some amazing work. Very few people get to go home at the end of the day feeling like they've done something for humanity - Covance employees get that opportunity. Benefits and coworkers are the best reasons to work for Covance.
Cons
In the past three or four years, Covance has increased the number of rooms, facilities and workload. The senior management was not well prepared to handle the increase in work. They did not adaquately staff and, as a result, exisiting employees were left to carry out a higher workload than anticipated. This resulted in a number of challenges to staff: errors, stress, unhappiness. There are two additional facilities that are expected to come "online" in the next 3 years, but internal recruitment for those facilities has failed miserably. Senior management has required that staff interested in transferring laterally to the new facilities must go through interviews for the positions that they currently hold. Additionally, relocation packages are not discussed until after the interviews. This makes it impossible to judge whether you really would be interested in moving, and wastes both the interviewer and interviewee's time.