Okay, let’s tackle this. So Henryk has a mix of skills that are in demand, especially in the environmental sector. He has a degree from the University of Birmingham, which is a reputable institution. However, his location in the Greater Seattle Area might limit his salary range. Environmental engineers with similar experience and education can earn around $60,000-$80,000 per year. Considering Henryk’s skills in project planning and wastewater treatment, I’ll estimate his hourly rate to be around $37-$50. Given the average salary range, I'll round down to $75 per hour.