Rosalind Dalefield completed a BVSc and a PhD in veterinary pathology at Massey University in New Zealand, followed by a postdoctoral residency at the Comparative Toxicology Laboratories, Kansas State University. In 1999 she became a Diplomate by examination of both the American Board of Toxicology and the American Board of Veterinary Toxicology. She is a full international member of the Society of Toxicology. Dr Dalefield's experience in toxicology includes human health risk assessment in a government regulatory toxicology role; a USEPA-funded role in environmental toxicology including that related to aquifers, brownfields and former military bases and bombing ranges; experience as a Study Director and a Study Monitor in nonclinical pharmaceutical development in GLP contract toxicology laboratories; participating in a helpline providing advice on veterinary and environmental exposures and toxicoses; and operating a diagnostic toxicology laboratory covering metals, feed toxicants including mycotoxins, samples for detection of environmental and wildlife toxicants, and testing for performance-enhancing drugs in greyhounds. Areas of specialized knowledge include human health risk assessment, nonclinical toxicology, international Good Laboratory Practice regulations, carcinogenicity assessment, inhalation toxicology, environmental toxicology, veterinary and comparative toxicology, and anatomic and clinical pathology of laboratory animals.She has written a number of review articles, book chapters and original research articles. Dr. Dalefield is also qualified as a Lead Auditor in Quality Management Systems.