"Mountainhead," a dark comedy film by Jesse Armstrong, was made for a single-location set-up, primarily filmed at a massive mountain estate in Utah. The film centers around four tech moguls who are trapped at this isolated estate during a global catastrophe. This film came together at lightning speed, with only four weeks to prepare its single location. As the New York set decorator buyer, I remotely sourced all the furniture, lighting, art (including works from Demien Hirst and Jeff Koons) and wall treatments for this 21,000-square-foot location.