Moss Adams is a public accounting firm that provides accounting, tax, and consulting services to public and private middle-market enterprises in many different industries. The firm has more than 3,200 professionals across more than 25 locations in the United States and beyond. Moss Adams is the largest accounting firm headquartered in the West and one of the largest in the United States. The firm was founded in 1913 and has been providing quality services to clients for over 100 years.