ESI is known as the “Service Center” and provides the facilities and leaders it serves with “back-office” support in areas such as accounting, construction, compliance, human resources, information technology, learning and development, legal and risk management and recruiting. Location: Field Resource and regularly travels to assigned facilities; must reside near a major airport in one of the following areas: Sacramento, Modesto, Santa Rosa, Davis, Ventura, Los Angeles, or Orange County.