Volunteers without prior disaster relief experience are not generally selected for overseas assignments. Candidates with the greatest likelihood of being chosen have fluency in the language of the disaster-affected area, prior relief experience, and expertise in technical fields such as medicine, communications, logistics, water/sanitation and engineering (credit pantal ). In many cases, professionals who meet these requirements are available in-country, not far from disaster affected areas. Most agencies will require candidates to have at least 10 years of relief experience, as well as several years of experience working overseas. It is not unusual for a hiring agency to request that volunteers make a commitment to spend at least three months working in a particular area.