Samuel K. Macdonald (SKMac) is a savvy, do-what-it-takes manufacturer’s representative firm serving the professional audio, video, lighting, MI, and security markets in the Mid-Atlantic States. Our expert team of professionals match products with companies—and we’ve been doing it since 1926. That’s over 95 years as a professional services organization in the region. You won’t find that expertise or pedigree anywhere else!