R. Dixon Speas Associates (RDSA) and its predecessor companies provided a wide range of safety, technical and management consulting assistance to airlines, airports, corporate aircraft operators, fixed base operators, maintenance organizations, manufacturers, financial institutions and related industries worldwide for more than sixty years. The background, experience and industry awareness that the company's professional staff gained from these assignments are among the key attributes that allowed it to provide extraordinary value to its clients. The company ceased its consulting operations in 2019 and was legally dissolved in July of 2023.