Profile: S & D Worldwide Enterprise, Inc. markets and fabricates (through our associate companies) equipment used in the oil and gas industry. Our Wolf series sewage treatment units are designed and fabricated by packaged sewage treatment systems. Our tertiary treatment systems are applicable for use where the supply of water is unstable or excessively expensive. We also offer a wide range of state-of-the-art, skid mounted water filtration systems and ancillary equipment.