Ultimate Staffing Services is a staffing agency that provides temporary staffing and permanent placement services. The company was founded in 1994 and is headquartered in Anaheim, California. Ultimate Staffing Services is a division of Roth Staffing Companies, L.P., which is one of the largest privately-held staffing companies in the United States. The company has won numerous awards for its services, including being named one of the Best Staffing Firms to Work For by Staffing Industry Analysts.