Zwahlen & Mayr SA engages in the provision of general and steel construction services. It operates through the segments Metal Constructions, Welded Tubes, Drawn Tubes, and Efimex, general contractor. The Metal construction segment refers to the lines of metallic works. The Welded tubes segment includes the manufacture of stainless steel tubes by profiling and welding for equipment, and heat exchangers from the chemical, food and petrochemical industries. The Drawn tubes segment is the manufacture of high precision drawn stainless steel tubes for the automotive industry, pneumatic, hydraulic and electromagnetic instruments, and instruments and in construction of machine tools. The Efimex, general contractor segment includes the construction projects in general contractors. The company was founded on July 21,1948 and is headquartered in Aigle, Switzerland.