Janet Mary Grieve, also known as Janet Bradford-Grieve and Janet Bradford, is a New Zealand biological oceanographer, born in 1940. She is researcher emerita at the National Institute of Water and Atmospheric Research in Wellington. She has researched extensively on marine taxonomy and biological productivity. She was president of both the New Zealand Association of Scientists (1998–2000) and the World Association of Copepodologists (2008–11).

The New Zealand Association of Scientists is an independent association for scientists in New Zealand. It was founded in 1941 as the New Zealand Association of Scientific Workers, and renamed in 1954. It differs from the Royal Society of New Zealand in being an independent non-profit incorporated society and registered charity, rather than being constituted by an Act of Parliament. While not being entirely non-political, the Association focuses on policy, social and economic responsibility aspects of science.