Tyco International Ltd. is a diversified, global company that provides vital products and services to customers in more than 60 countries. With more than 100,000 employees worldwide, Tyco is a leading provider of security......Tyco International Ltd. is a diversified, global company that provides vital products and services to customers in more than 60 countries. With more than 100,000 employees worldwide, Tyco is a leading provider of security products and services, fire protection and detection products and services, valves and controls, and other industrial products.