Pros
Chemonics' best attribute is it's internal systems and trainings. It is a great place to get a start in development because of its focus on professional development and keeping every employee involved in the proposal process. Most of the employees are professional, smart, and personable. It has a good corporate culture, and there is a lot of room to move within the company laterally and vertically. Most people seem to find opportunities to move up fairly quickly. The executive office is amazingly accessible relative to other companies where I've worked.
Cons
Salaries are generally low and past experience is often overlooked. The work load is heavy and can be very administrative. Without a developed technical background, it can be difficult to move beyond the administrative work.