Pros
Good office culture, managers encourage taking time off and work-life balance, coworkers are friendly and helpful, occasional extra hours to meet deadlines (which is inevitable in any industry), but frequent praise and recognition given by management for hard work. Ability to work with many different types of people and studies. Challenging and interesting work. Training available to increase knowledge or prepare for management positions. Quintiles encourages employees to focus on health, nutrition and physical fitness and offers many perks related to those areas. Opportunity to interact with people from all over the world.
Cons
If hired as a contract employee, you have no guarantee of being offered permanent, full-time position. Must work about a year before you have the chance to be transitioned. During that time, you do not have any benefits (unless you pay out of pocket).