This is most definitely an American and based on the uniform, I'd agree with the others that it is a band uniform. Looking at the medals on the top row, there is one suspended from his neck and then starting at the button line, the second medal over is a Grand Army of the Republic medal. The Grand Army of the Republic is similar to today's Veterans of Foreign Wars or the American Legion veteran's organizations. Enrollment in the GAR peaked in 1890 and there were lodges all over America (not unlike the VFW lodges).
The GAR medal is similar in appearance to the Civil War era Medal of Honor but is different in that the eagle is above the ribbon whereas the MoH is below the ribbon.
I have never seen a foreign medal that is similar in appearance to the US MoH and/or the GAR medal - it has a distinctive American look. And, if you zoom in on the photo, you'll notice that his GAR medal has an American flag ribbon.
I would say that this gentleman is a Civil War veteran (Union) and is the drum major of a GAR band or some other veteran's group. Some of the other medals well may be society medals, GAR accomplishment medals, or other civic/veteran awards.
The guy who leads the marching band is called the "Drum Major," and I could very easily see him called "The Major" years later by his grandkids.
I may be wrong, but this is what I think.