Mathieu Mirano | 50 followers on LinkedIn. At 23 years old, New York-based designer, Mathieu Mirano is a force to be reckoned with. Since making his debut at New York Fashion Week at the age of 19, Mirano has already established himself as one of America’s most talented designers. Known for his appreciation of detail, high level of craftsmanship and restrained elegance, Mirano is all about creation and innovation.