Okay, let’s tackle this. So Diane has 21 years of experience in investment and finance, which is a strong foundation. Her skills in risk management, leadership, and financial analysis are in demand. She also has an MBA from the University of Tulsa, which adds prestige. However, her current role as an Investment Controller might not command the highest rates. Considering her experience and skills, I'd estimate her hourly rate to be around $125, which is slightly below the national average for investment professionals in the US. Some investment managers with similar experience can charge $200-$300 per hour, but Diane's role is more focused on internal management, so I've kept the estimate lower.