The Cawthron Institute is New Zealand's largest independent science organisation, specialising in science that supports the environment and development within primary industries. Cawthron has its main facilities in Nelson. It works with regional councils, government departments, major industries, private companies, and other research organisations throughout New Zealand and around the world. Cawthron employs approximately 300 scientists, laboratory technicians, researchers and specialist staff from 26 countries. It has both chemistry and microbiology labs, and has a major focus on food related testing for food safety and export certification. Cawthron holds IANZ accreditation for a wide range of tests. Its scientists include experts in aquaculture, marine and freshwater resources, food safety and quality, algal technologies, biosecurity and analytical testing.