The man in the picture is a professional rock climber named Alex Hannold who climbs America's biggest cliffs that made him one of the recognized climbers in the world. This picture shows one of his greatest accomplishment for breaking the speed record in climbing El Capitan in Yosemite for under two hours.
One of the technique that is used is "telling a story", Hannold can be seen looking down giving the impression that he is high up from the ground. The photographer also uses rule of thirds to emphasize Hannold while showing the breathtaking background. Lastly, the image has a strong diagonal element as it captures the attention of the viewers and directs the eye to Hannold.