ALS Limited is a testing services provider. The principal activities of the Company are the provision of professional technical services in the areas of testing, measurement and inspection, supporting environmental monitoring; food and pharmaceutical quality assurance; mining and mineral exploration; commodity certification; oil and gas exploration and production; equipment maintenance, and asset care operations. It operates through four segments: ALS Life Sciences, which provides testing data to assist consulting and engineering firms, industry and governments; ALS Minerals, which provides assaying and analytical testing services, and metallurgical services for mining and mineral exploration companies; ALS Energy, which provides specialist services to the black coal, and oil and gas industries, such as coal sampling and specialist well services, and ALS Industrial, which provides the energy, resources and infrastructure sectors with testing, inspection and asset care services.