Littler Mendelson P.C. is an American multinational law firm specializing in labor law. The company is known for its union busting practices, acting on behalf of business management against organized labor efforts, and is the largest law firm for union avoidance in the United States. Founded in 1942 in San Francisco, the firm expanded nationwide in the late 1990s and internationally in the 2010s, and has 100 offices in 28 countries.