Oscar Rialubin's stunning photo of a watch repairman in Doha, Qatar, is the winner of this year's Global Urban Photography competition.
The competition is organized by CBRE, a global real estate and investment firm, and is now in its fifth year. Rialubin's image was one of 21,000 submissions sent in from 113 countries focusing on the theme "cities at work."
This edition was the first to allow mobile entries. Chinese photographer Coco Liu, who captured a snowy scene in the city of Chicago, took away the first prize in that category.
CBRE also handed out awards in several regional categories, including Asian Pacific, Americas and EMEA (Europe, Middle East and Africa).
See more amazing entries from the Urban Photography Competition below: