On the right with a pace-stick, is a company sergeant major. The company sergeant major (CSM) is the senior non-commissioned soldier of a company in the armies of many Commonwealth countries, responsible for administration, standards and discipline.
Urology is a branch of medicine dedicated to treating disorders of the urinary tract (kidneys, bladder, urethra) and the male reproductive system. Urologists are physicians with specialized training in diagnosis, treatment and surgery involving these body functions.
Nephrology and Dialysis. In brief: Medicine vs Surgery. The differences may be subtle outside of professional circles, but essentially urology is a surgical field that deals with the urinary tract: kidneys, ureter, bladder, prostate, and genitals.