Okay, let’s tackle this. So João Carlos Gonçalves has a Ph.D. in Chemical Engineering from UFRRJ, which is a reputable institution. He also has experience as a project engineer and coordinator of a chemical engineering course. His skills in project management, Lean manufacturing, and Six Sigma are in demand in the petroleum industry. Location is Montes Claros, Minas Gerais, Brazil, which might affect his rate. Considering his education and experience, I estimate his hourly rate to be around $125, which is lower than what professionals with similar skills and experience in the United States might charge. This is due to the lower cost of living in Brazil and the local industry standards.