Natural therapists specialise in a range of complementary and alternative medical techniques and remedies (including homeopathy, herbalism and aromatherapy), which they use to diagnose, treat and prevent physical illness or dysfunction.

Pest and weed controllers kill or control plants, animals and insects that are considered troublesome or harmful to agricultural, industrial or domestic activities.

Pharmacologists evaluate the origin, effects and mechanisms of drugs and develop them for human and animal use.

Primary products inspectors examine animals, plants and agricultural produce at farms, abattoirs, processing and packing plants, wholesale markets and places of storage or shipment to ensure they meet government standards of hygiene and quality, and export requirements.

Veterinarians diagnose, treat and help to prevent disease and injury in animals. They advise on measures to prevent the occurrence or spread of diseases and on ways to improve the health and productivity of animals, and supervise safety standards on food supplies.

Veterinary nurses provide support to veterinarians in the management and care of animals receiving medical and surgical treatment.

Zoologists are biologists who study the structures, characteristics, functions, ecology and environments of animals to increase scientific knowledge and develop practical applications in wildlife management, conservation, agriculture and medicine. Zoologists usually specialise in one aspect of study such as entomology (insects), parasitology (internal and external parasites), ecology (environment of animals), ethology (animal behaviour), ichthyology (fish), mammalogy (mammals), ornithology (birds), herpetology (reptiles) or physiology (functions of animals).