Jiri's pictures have appeared in leading publications such as Geo, National Geographic Books, Vanity Fair, The New Yorker, The New York Times, Der Spiegel, FOCUS Magazine, FACTS Magazine, The Guardian, The Sunday Telegraph and The Times as well as in a variety of corporate magazines, reports and websites. In recent years he has also undertaken extensive assignments on global environmental issues for organisations such as Greenpeace and the World Wildlife Fund.