Okay, let’s tackle this. So Pat Carnahan has a degree from Marquette University and is a certified Professional Engineer. He has skills in wastewater treatment, water management, and construction management, which are in demand. Location is Milwaukee, Wisconsin, which is a mid-sized city. Engineers with his level of education and certification typically charge lower rates. Maybe around $75–$150 per hour? But considering his certification and skills, maybe higher. Some engineers in similar roles might average $100–$150. So I’ll estimate around $100