Mechanical engineers plan, design and oversee the development, installation, operation and maintenance of machinery. They conduct research to solve practical engineering problems and improve efficiency.

Mechanical engineering associates assist mechanical engineers and engineering technologists with the design, manufacture, construction, operation and maintenance of machines, manufacturing equipment, mechanical installations and mechanical facilities. They usually have a range of duties carried out under the direction of mechanical engineers and engineering technologists.

Mechanical engineering technologists design, inspect, manage and test technologies, systems and procedures in mining, manufacturing or processing industry plants.

Mechatronic engineers design and maintain machinery with electronic and computer control systems, such as aircraft, robots, motor vehicles, cameras, power generators and mining and chemical plant machinery.

Medical laboratory technicians carry out routine laboratory tests and other procedures used in the diagnosis and treatment of diseases and disorders of the human body.

Medical practitioners diagnose physical and mental illnesses, disorders and injuries, and prescribe medications and treatment to promote or restore good health.

Medical scientists conduct medical laboratory tests to provide information for diagnosing, treating and preventing disease. A medical scientist may specialise in haematology, immunology, transfusion science, clinical biochemistry, microbiology, histopathology, cytology, molecular genetics or virology.

Metallurgical technicians test materials as part of mineral processing and metal refining, or for research purposes, and provide technical support to metallurgical engineers.

Metallurgists research, control and develop processes that are used in extracting minerals from ore (rock) for refining metals.

Meteorologists forecast the weather and study the atmosphere to improve the understanding of climate.

Microbiologists study microscopic forms of life such as bacteria, viruses, protozoa, algae and fungi to increase scientific knowledge and develop medical, veterinary, industrial, environmental and other practical applications.

Mining engineers plan and direct the engineering aspects of extracting mineral, petroleum and gas resources from the earth.

Mobile App Developers can design, build and/or maintain mobile applications for either Apple's iOS or the Android platform. There are a few other platform choices.

Motor mechanics service, repair and overhaul the mechanical parts of light motor vehicles, such as the engine, the transmission (clutch, gear box and differential), and the suspension systems (springs, steering, brakes, wheels and tyres).

Museum curators look after, manage, organise, display and develop museum collections, and conduct related research. Museum curators usually specialise in a broad discipline, such as anthropology, art, decorative arts, natural history, social history, science or technology. Within that discipline they are generally recognised as authorities on one or more specific subject areas.