I personally would've placed the model on the right side of the frame so that his direction of his head doesn't lead off to nothing in the photo (it makes the right side seem like dead space imo).
Also in terms of processing maybe you can adjust your highlights/shadows to bring more depth out as well as add some more contrast to intensify the photo.
I personally think senior portraits should focus on the upper body and be more restrictive in their field of view, but that's not a bad photo in general.