ACE USA is a retail operating division of the ACE Group of Companies and is a subsidiary of ACE INA. ACE USA provides a range of property and casualty, financial, risk management, accident, disaster, professional lines, workers compensation and health insurance products to individuals and businesses throughout the United States and Canada. ACE USA provides customized services to four specialized industries, including construction, healthcare, logistics and public entities. One of its divisions, ESIS, provides risk management and loss control services to several clients. ACE USA also offers special products and services to aerospace, aviation and energy industries, as well as provides terrorism- and weather-related insurance products. It has more than 2,500 employees and is headquartered in Philadelphia.