To start with, my answer is a straight yes. An efficient and skilled executive producer is the one who manages the flow of money throughout the entire movie project and sits on top of all in the hierarchy. Having an experienced hand who has the best knowledge on film making, filming tools, props, and tie-up with suppliers and renting services will surely make a huge difference in the movie itself which is often referred as production quality. Why wait? go hire Kia Jam if possible or find the next best alternative if he is busy.