The company debuted with the EMB 110 Bandeirante in their product line, which was a 100% Embraer design sold both to domestic air carriers and the Brazilian Air Force.
Using a lot of foreign parts and designed by a French engineer brought over just for this project, all bankrolled by the Brazilian state which the next decade suffered a massive inflationary crisis due in part to these forced industrialization strategies.
The reality is before the privatization Embraer was pretty much a nobody in the aerospace industry, unlike now.