This paper has three objectives: (i) to identify promising sectors worth encouraging with a view to fostering the development of the Brazilian states; (ii) to evaluate the impact of economic complexity on the volume of employment; and (iii) to simulate how many new jobs would be created if each state were to become competitive in the activities considered promising for it. The results obtained vindicate the approach of the Economic Commission for Latin America and the Caribbean (ECLAC), which emphasizes the contribution of changes in the production structure to the development process, and reaffirm how important complexity is in improving the economic performance of countries or regions, whether this is measured by income or employment.