Okay, let’s tackle this. So John Demaio has a broad range of skills in cleantech, renewable energy, and engineering. He’s located in the San Francisco Bay Area, which is a hub for tech and clean energy innovation. While he doesn’t have a specific job title or company mentioned, his skills are in high demand. According to national averages, cleantech professionals with his level of expertise can charge around $100–$200 per hour. However, considering his broad skill set and location, I’ll estimate his rate to be on the higher end of that range, around $125 per hour.