Okay, let’s consider Warren’s skills and experience. He has a PhD, MBA, and MHRD, which indicates a high level of education in his field. His skills include HR consulting, organizational development, and project management, which are in demand. However, his skills don't seem to be in the most in-demand areas like tech or finance. Considering his location in Greater Houston, the cost of living is relatively low compared to other major US cities. Taking these factors into account, I estimate his hourly rate to be around $125, which is below the national average for HR consultants and project managers but still competitive in the Houston market.