 They can work on all stages of a product, from research and development to design and manufacture, through to installation and final commissioning.Most industries rely on mechanical systems and mechanical engineering is thought to be one of the most diverse of all engineering disciplines, with employment opportunities available in a wide range of sectors, such as the manufacturing, power, construction and medical industries.Mechanical engineers can also be involved in the management of people and resources, as well as the development and use of new materials and technologies.