From humble beginnings as a three-person storefront in 1989, ATI has grown to over 1,200 employees and has become a nationall ... y recognized leader in restoration, environmental remediation, and reconstruction services. As the nation’s largest family-owned restoration contractor, ATI is available and at your service 24/7 every day of the year. ATI is proud to offer all customers a personalized service experience from our management team, plus all the logistical and technological benefits of a large company. Our Corporate Headquarters are located in Orange, CA and the company is comprised of two major divisions: Environmental and Restoration/Reconstruction Services. Within these divisions, we provide comprehensive recovery services to address environmental hazards; mitigate damage following natural and man-made disasters; and to fully restore built structures and their contents. Our services include: - 24-Hour Emergency Response - Environmental Remediation for Asbestos, Lead, Mold and Biohazard - Contents Cleaning and Restoration - Reconstruction - Catastrophe Response read more