If you're going abroad because you think you're going to be at the height of your profession, you may be disappointed. If you want to do water projects and you want to be at the height of that technology, you should go to southern Alberta, rather than the Sahara Desert in Chad or etcetera. The skill sets required is to take your technical skills; but it's all the skills around that that are going to propel your international career. It's going to be how to deal and manage a project with people from four different cultures, including obsessed Japanese with details and timing, where you have laid-back, perhaps, Chadians who are less systematic, etcetera. The process of living abroad is what you want to enjoy, not just the professional aspects. And it's the soft skills that propel your career- your ability to plan projects in a multicultural environment, your ability to give direction and change your management style according to the people you're dealing with, and to be nimble on all sides. So it's not necessarily your computer skills or your computational skills, your technical skills. It's going to be the people skills.