S&D/Osterfeld Mechanical Contractor addresses the specialized and technically challenging needs of construction projects that are directed by plans and specifications, as well as construction projects directed by a client's unique design/build piping applications. Serving the needs of both the private and public sectors, the mechanical contractor has been in business since the turn of the 20th century. S&D/Osterfeld is experienced in meeting the demanding piping specifications of structures holding foods, grains, edible fats and oils, brewing and distillation; pulp, paperboard and converted products; inorganic chemicals, plastics/synthetics and industrial organic chemicals; gas and natural gas transmission/distribution; and industrial machinery. The contractor performs pipe welding, waste treatment, process piping and boiler conversion. Located in Dayton, Ohio, the company is a subsidiary of Unitize Company, Inc.