Pros
The United Nations is one of the most significant mission-driven organizations. Name recognition is phenominal. The opportunity to grow within the organization is excellent. Salaries are on par or better than many organizations. International travel possible, language training offered for free. Ability to influence change, depending on the position and level - extraordinary. Jobs world-wide, travel often possible. Women have a better chance now than ever for senior positions,
Cons
Large and bureaucratic organization, dependent on 193 countries to agree on change, funding and sustainable employment. Downsizing, with awkward transitions and an opaque process for change. Much built-in deadwood to work around. Country of origin often a preference in selection of candidates.