McCormack drew early inspiration from the work of Galen Rowell, including the pursuit of imagery in remote locations using lightweight photographic equipment. His own style is still heavily influenced by Rowell's signature approach of combining dynamic landforms with vivid natural light.
Video work
McCormack has worked in video since 2010, in particular with HDSLRs such as the Canon 5D Mk2 and point of view devices such as the GoPro Hero. His video has been used by Tourism Ireland. Some of his landscape and timelapse footage will also be used in the RTÉ documentary The Island Landscape to be aired in April 2013.
Other work
McCormack is also a writer on walking and adventure travel. He has been a regular contributor to the Irish outdoor magazine Walking World Ireland since 1997. He is author and co-author of several walking guides published by Lonely Planet and Rucsac Readers.