Okay, let’s tackle this. So Derek Pei has a mix of technical skills like design control, testing methodologies, and packaging design. He’s also got some industry-specific skills like medical devices and patents. Location is Richmond, Virginia, which is a mid-sized city in the US. Quality engineers with his level of expertise and skills might charge around $75–$100 per hour, considering the industry average and the fact that he’s not a senior or executive-level professional. Maybe a bit lower, but still a good starting point.