The story of HDR|Daniel Frankfurt is one of steady, targeted growth over decades of dedication to public projects and public agencies. The firm has been a growing force within the engineering and architectural community since its founding in 1968. In August of that year, Daniel Frankfurt and John Carroll formed the firm of Carroll and Frankfurt. Drawing upon Mr. Carroll’s career in public transportation and Mr. Frankfurt’s aeronautical engineering background, the firm emerged as the union of dedication to public projects and design innovation.