Based in Wichita, Kansas, Koch is one of the largest private companies in America. A diverse set of businesses and industries across the world, we work together to keep improving and exploring new ways to make life even better.With a presence in more than 50 countries, Koch companies employ about 120,000 people worldwide, with nearly half of those in the United States. Koch offers abundant opportunities to improve life’s most necessary things – like food, clothing, water, transportation and technology.