Daniel Ludwig’s skills in PCB design, mechanical engineering, and thermal system design are in demand. His experience in these areas, combined with his location in North Chelmsford, Massachusetts, suggests a rate around $125 per hour, which is lower than what professionals with similar skills in high-demand areas like San Francisco or New York might charge. However, considering his expertise in multiple areas, he could potentially command higher rates. Let’s check benchmarks. According to Glassdoor, mechanical engineers in Massachusetts with similar experience can earn around $80,000 per year, which translates to around $38 per hour. However, this is a broad estimate and doesn’t take into account his additional skills like graphic design and CAD. A more accurate estimate would be to consider the average hourly rate for engineers in the Cambridge, MA area, which is around $100 per hour. So, I’ll estimate around $125 per hour, taking into account his expertise and location.