Dr. Davies studies human exposure to hazardous chemicals and physical agents in the workplace and community. His current research is investigating  silica exposure and control in construction workers and exposure to hazardous drugs in health care and veterinarian workers. He has studied the “non-auditory” effects of noise, investigating the role of noise at home and work in cardiovascular diseases, adverse birth outcomes, rheumatoid arthritis and diabetes, and its impact on childhood learning. He is Principle Investigator of the Canadian Workplace Exposure Database Project, a repository of half million occupational exposure measurements from around Canada.

He has 85 peer-reviewed publications and his work has been cited 3600 times (h-index of 32; PubMed) . In 2012 he received a Killam Research Fellowship, and in 2021, the Killam Teach Prize.

He is a board certified industrial hygienist (CIH), a member of the ACGIH Chemical Substances TLV Committee, past-president of the Canadian Association of Research on Work and Health and served as Chair of the International Congress on the Biological Effects of Noise.