Field is currently an occupational and environmental epidemiologist as well as an internationally recognized expert on the measurement and health effects of radon gas.
He is also widely credited with identifying protracted radon exposure as the "[6]leading environmental cause of cancer mortality in the United States".
He has been actively involved at the local, state, national, and international level in communication efforts (i.e. research-to-practice) to reduce smoking and radon-related lung cancer since publication of the landmark radon study.
[8] He has served on numerous national and international committees including the World Health Organization's International Radon Project,[9] the United States Environmental Protection Agency's (EPA) Science Advisory Board, and as the chair of the Board's Radiation Advisory Committee in 2014.
[10] The board is appointed by the President to advise the Secretary of the Department of Health and Human Services on its activities under the Energy Employees Occupational Illness Compensation Program Act of 2000.