Okay, let’s tackle this. So Gregory has skills in robotics, design, and industrial automation, which are in demand. He’s a licensed professional engineer (P.E.), which adds value. Location is the Greater St. Louis area, which has a strong manufacturing sector. According to the Bureau of Labor Statistics, engineers in the Midwest (where St. Louis is located) can expect median salaries around $90,000. However, considering his expertise and P.E. license, I’d estimate his rate to be around $125 per hour, which is slightly above the national average for engineers in this region.