Overall, a nicely done image. The tones of the coat nicely complement the autumn colours in the background.
This is one of those images where adherence to the "Rule of Thirds" is not working particularly well. When I throw the thirds lines on the image, they are well aligned with the eyes of the subject.
In a portrait, the eyes are often a very important part of the composition, but in a 3/4 shot, they play a smaller compositional role than the whole head and face do. By applying this rule of composition, you have an image that is looking a bit top-heavy and unbalanced, with a lot of yellow and brown leaves at the top of the frame. I would suggest that this compositional rule is not particularly effective the way it has been applied here.
I would suggest filling the frame with more of the subject by doing a crop of the top of the image is going to result in a stronger picture. The rule of thirds does not work, but rather the effective use of complementary colours (another compositional technique) is effective.