Pros
Fluor has some of the most challenging projects, in some of the most challenging locations. Fluor also has one of the industries highest compensation scales. There Time Off With Pay or vacation is nice because it is so flexible to accommodate the needs of the employees. There is no "use or loose it" with the vacation. The benefits are good. There might be some better benefits out there, but not too many places offer better, along with the same levels of compensation. The company does get it's fair share of work, and values their employees. If you pull your weight, they will do what they can to keep you working. If you coast or don't do your work, they will send you on your way. They strive to improve their processes, and seek employee involvement and encourage training and skill development to improve the value to their clients.
Cons
Fluor does not have a bench or overhead for people between projects. All hours for project type employees have to be billable to the projects. (typical for a lot of EPC companies) The business line management and project management is sometimes very "clicky" and not open to accepting people they don't know onto their projects. New employees have a difficult time becoming accepted quickly. You might have to take a position with less responsibility until the manager has had an opportunity to see how you perform and access your talents for themselves. It is thesame between the business lines. People from one business group will not take people from other groups with out some strong endorsements from others, who's opinion is respected. Therefore, movement to open positions across the companies business lines can be difficult.