Machine Sazi Arak Co. (MSA) was founded in 1967 in an area of 134 hectares in Arak city to meet the country's industrial needs, construct industrial units, and produce all kinds of machinery, equipment, and other industrial products as the first Iran heavy industry. The company's infrastructure includes all product flow activities ranging from raw material production to final product delivery, which has created unique and strategic flexibility in providing the country's industrial needs and has always been a leader as an industry maker.

This large industrial complex under the ownership of Teachers Reserve Fund Institute is the first and largest industrial complex in the country. MSA with more than half a century of brilliant history in the field of industrial development and infrastructure and with scientific capabilities, about 2,000 experts, experienced specialists, advanced equipment, and modern facilities in the form of five different manufacturing groups, four subsidiary companies, and two support groups and a university of applied science and technology can carry out large national and international projects and produces different types of products in the following business areas:

Machine Sazi Arak is the only industrial complex in the country that has a wide range of various production and implementation of industrial projects and has an organization consisting of various manufacturing groups and executive departments in the form of five manufacturing groups:

The Deputy Director of Project Affairs has been organized for the implementation of specific EPC projects as a public contracting and five independent companies called the following:

MSA Engineering and Construction Company
Paysaz Company
Akam Oil and Gas Company
Hoopadmashin Company
Kansar Company

Over the years of effort and experience, the company has been able to develop production lines and construction of large machinery and metalworking workshops and forging and casting workshops optimizing these lines and having the latest hardware and software facilities and specialized technical knowledge takes steps to meet the needs of customers and rely on competitive experiences and advantages such as diverse machinery and production processes and flexibility of production lines as one of the country's infrastructure and strategic industries carry out many projects that are new in design and technology and completed for the first time in Iran.

The company's main activities and products are:

General contracting and EPC projects, engineering, procurement, construction, and commissioning of various storage and spherical tanks, mobile and fixed pressure vessels, distillation towers, heat exchangers, air coolers, indirect heat exchangers, gas stations, mobile oil treating units, valves and wellhead equipment, drilling rigs, various process pumps for the oil and gas industry, cranes and hydro-mechanical equipment for dams, water tubes, fire tube and cycles combination steam boilers, bridges and heavy steel structures, steel and cement factory equipment, all types of alloy steels, pressure flanges, industrial rings, , axle and railways tires, steel balls, heavy machining, industrial furnaces, types of machinery and plant equipment, wind power plants, incinerators, and ship unloader equipment. Mining and port equipment, incinerators, reconstruction, modernization, and overhaul of industries.