Nicholas Cody Schaal


Lieutenant Commander, Navy

Department of Primary Appointment:
School of Medicine
Preventive Medicine and Biostatistics
Location: Uniformed Services University of the Health Sciences, Bethesda, MD
Research Interests:
Industrial Hygiene, Occupational Health and Safety, Exposure Assessment, Hearing Conservation, Hazardous Noise, Chemical Induced Hearing Loss
Office Phone


Ph.D., Safety Sciences, Indiana University of Pennsylvania
M.S., Environmental Health (Industrial Hygiene specialization), Colorado State University
B.S., Environmental Management, University of Maryland University College
A.A.S., Bioenvironmental Engineering Technology, Community College of the Air Force


Lieutenant Commander N. Cody Schaal is an Industrial Hygiene Officer in the U.S. Navy. Previously he worked in the Bioenvironmental Engineering career field in the U.S. Air Force. He was assigned to Offutt AFB, Nebraska as a Bioenvironmental Engineering technician, Misawa AB, Japan as the non-commissioned officer in charge of the Industrial Hygiene element and then was assigned as non-commissioned officer in charge of the environmental surveillance element. Upon joining the U.S. Navy as an Industrial Hygiene Officer, Lieutenant Commander Schaal served at Environmental and Preventive Medicine Unit 2 in Norfolk, Virginia in the Fleet and Fleet Marine Forces Support Department. He then was assigned to the USS ENTERPRISE as the Assistant Safety Officer/Industrial Hygiene Officer where he provided safety, environmental, and occupational health support for over 3,200 Sailors. Lieutenant Commander Schaal was assigned as Head, Industrial Hygiene department for Naval Hospital Sigonella and collateral duty Radiation Health Officer. Additionally, he was assigned as interim Safety Manager for Naval Hospital Sigonella. He served as Industrial Hygiene Department Head at Naval Hospital Bremerton providing Industrial Hygiene services for a diverse Navy Region Northwest that includes six states extending from Alaska to Wyoming. Lieutenant Commander Schaal is currently a Non-Billeted Assistant Professor at the Uniformed Services University for the Health Sciences. Lieutenant Commander Schaal is the Occupational and Environmental department head at the Naval Medical Research Unit Dayton where he is responsible for basic and applied toxicology and environmental health research to determine the potential health effects of occupational and environmental exposures to chemical and physical stressors to DoD service members and civilian populations.

Representative publications, projects, and/or deployments


PMO 1029 Occupational Noise Control-Distributed Learning (spring 2019)

PMO 1021 Occupational Noise Control (spring 2018)

PMO 550 Industrial Hygiene I and Lab (winter 2016-2019)

PMO 553 Industrial Hygiene Field Studies (summer 2017-2019)

PMO 540 Introduction to Environmental Health (pre-fall 2017)

PMO 940 Environmental/Occupational Health Directed Studies (2016-2019)


:Industrial Hygiene Officer of the Year Award (2018)

Dean's Impact Award, Uniformed Services University, F. Edward H├ębert School of Medicine (2017)


Schaal, N., Salaam, R., Stevens, M. & Stubner, A. (2019). Living At Work: 24 Hour Exposure Aboard U.S. Navy Aircraft Carriers. Annals of Work Exposures and Health, 63(3), 316-327.

Hansen, J., Schaal, N., Juarez, T., & Woodlee, C. (2019). Nitrous Oxide Exposure Among Dental Personnel and Comparison of Active and Passive Sampling Techniques. Annals of Work Exposures and Health. 63(3), 337-348.

Schaal, N.C., Lange, K., & Majar, M. (2019). Noise at sea: Characterization of extended shift noise exposures among U.S. Navy aircraft carrier support personnel, Journal of Occupational and Environmental Hygiene, 16(2), 109-119.

Schaal, N. C. & Boudreaux, A. F. (2018). Effects of Occupational Metal Exposure on the Auditory System. Hearing Journal, 71(8), 8-10.

Schaal, N. C. (2018). Alternative Explanations for Hearing Loss in an Industrial Shipyard. Hearing Journal, 71(7), 20-22.

Schaal, N. & Sayler, S. (2018). Noise Exposure Discoveries: Correlations and Chemicals. In Essentials of Exposure Assessment II (pp. 17-22). Falls Church, VA: American Industrial Hygiene Association.

Schaal, N. C., Slagley, J. M., Richburg, C. M., Zreiqat, M. M., & Paschold, H. W. (2018). Chemical-Induced Hearing Loss in Shipyard Workers. Journal of occupational and environmental medicine, 60(1), e55-e62.

Schaal, N. C., Brazile, W. J., Finnie, K. L., & Tiger, J. P. (2017). Effects of Known Determinants on Methylene Bisphenyl Isocyanate (MDI) Concentration During Spray-On Truck Bed-Lining Processes. Annals of Work Exposures and Health, 61(7), 872-882.

Schaal, N., Slagley, J., Zreiqat, M., & Paschold, H. (2017). Effects of combined exposure to metals, solvents, and noise on permanent threshold shifts. American Journal of Industrial Medicine, 60(3), 227-238. (doi: 10.1002/ajim.22690).

Shufutinsky, A., Shanahan, P., Schaal, N., Madad, S., & Johnson, D. (2015). Applying Conflict Analysis and Resolution Strategies to Assess Organizational Safety Culture in Accident Investigations. International Journal of Interdisciplinary and Multidisciplinary Studies, 2(3), 71- 90.