Two uniformed men strike an affectionate pose for a studio photographer in Kansas City, Missouri. Magnifying the photograph did not help definitively determine if the men were railroad conductors, firemen, police officers, or some other uniformed occupation. The photographer of this image is the Driffill studio. Mrs. Kittie Driffill operated a photography studio at 615 West 6th Street, in Kansas City. City business directories confirm that she had a studio in Kansas City between at least 1887 and 1910. According to the 1900 United States Census, Kittie worked the business with her son Edward Mack. In 1907 she worked with her husband Thomas Driffill.. Kittie Driffill also used the first name of Katherine.
THE CABINET CARD GALLERY 
They are Kansas City Firemen. The cap badge is pretty common fire company design but I found the identical coat badge on Worthpoint.com to confirm.
http://www.worthpoint.com/worthopedia/fireman-badge-kansas-city-mo-fire-dept-jackson
Merry Christmas!
I was going to say firemen but mike beat me to it. 🙂 I have a similar photo with the Maltese cross and it was a fireman.