Mactech is a provider of on-site machining services, heat treating services, and stress-relieving equipment for major industries worldwide, including petro-chemical, pulp and paper, power generation, and ship-building. They offer a wide range of portable machining and heat treating equipment for sale or rent globally. Mactech's services include field machining, flange facing, industrial drilling, and pressure vessel repair. The company focuses on developing customized solutions for industrial machining needs and emphasizes quality, affordability, and availability of their products.