Karl Hofmann is the president and CEO of Population Services International, a nonprofit global health organization based in Washington, D.C. PSI operates in over 50 countries worldwide with programs in family planning and reproductive health; malaria; water and sanitation; HIV; and noncommunicable diseases. For nearly 50 years, PSI has measurably improved the health of people in the developing world, making it easier for them to lead healthier lives and plan the families they desire.