Designers, Decorators & Trade Partners Become a Certified Residential Designer Join Decorator / Designer Society of America. A world of interior design resources is now at your fingertips! Our innovative program has been carefully designed to provide decorators, designers and trade partners a convenient way to access everything you need to start or grow your design business! This, combined with our extensive national consumer referral and education program will take your business to a whole new level. DSA is critical to your success in the world of design and decorating. We all know there is strength in numbers. Raise your professional standing in your community and join your colleagues to stay at the top of your field. As a DSA Member you will have access to a world of resources, all carefully organized on our website for your convenience.  Take advantage of this tremendous opportunity to enhance your knowledge, increase your skills and broaden your customer base with referrals.