In 2002, Catherine and Sean Sowder set out to build something different—an organization where quality, communication, and craftsmanship came first. They saw that clients needed more than signs; they needed a partner who could guide them through the entire process with confidence and care.
Nearly two decades later, that vision continues to shape SDDI Signs. With more than 60 years of combined industry experience, our team brings creativity, technical skill, and genuine dedication to every project. From consultation and design to manufacturing and installation, we work collaboratively to deliver signage that enhances spaces and helps our clients stand out.