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. About the Company Ensign Services, Inc. (“ESI”) is a subsidiary of The Ensign Group, Inc., which is a national leader in the operation of skilled nursing, senior living, rehabilitation, home health, hospice, and other healthcare services.