American stainless steel equipment manufacturer. MARKS is a full-service, design-built metalworks firm that specializes in all aspects of stainless-steel tank and equipment production, from tanks to components. We are about efficiency and effectiveness. We make complex problems simple through a combination of engineering intelligence and fabrication excellence. We help our partners realize their vision and achieve the impossible using custom designs and the highest-quality materials. Whatever you make, we work to make it better.