Noah S. Seixas, PhD, MS

Professor, Env. and Occ. Health Sciences (Primary department)
Dr. Seixas is a certified industrial hygienist with an emphasis on the quantification of exposure for occupational epidemiology. In addition to teaching occupational hygiene courses and maintaining an active research program,Dr. Seixas serves as Chief Editor of the Annals of Occupational Hygiene. Current research interests include characterization of exposures and intervention strategies to control exposures to noise in construction and welding fume in shipyards. Dr. Seixas is also interested in organizational factors that may contribute to disparaties in occupational health experience, especially among immigrant workers.

Contact Information

Box: 354695
4225 Roosevelt Way NE
Seattle, WA 98195-
Tel: 206-685-7189

Research Interests

  • Exposure assessments in the context of retrospective, cross-sectional and prospective epidemiology studies and health and safety needs of workers in precarious jobs. Characterization and control of welding fume exposures in shipbuilding and other industries. Investigations in the mining, construction, waste handling, and primary and secondary metal industries. Evaluating the effectiveness of organizational interventions to improve safety and health performance. Developing effective health and safety programs for contingent and immigrant workers.
  • Other key research interests include: Construction safety and health, Contingent and immigrant worker safety and health, Endotoxin, Environmental epidemiology, Exposure assessment, Global occupational health, Hard metal/machining, Hearing loss (noise-induced), Health and safety education, Health and safety management, Industrial hygiene, Noise, Occupational disease statistics, Occupational and environmental epidemiology, Occupational exposure, Safety, Silica, Welding & metal trades & hazards, Workplace hazards, Welding & metal trades & hazards


PhD, Industrial Hygiene, University of Michigan, 1990
MS, Industrial Hygiene, Harvard University, 1982


Addressing the health and safety needs of day laborers and other contingent workers.
Training to improve effectiveness of joint labor-management health and safety committees.
Reducing welding fume exposure in shipyard confined spaces.
Welding exposures and risks of neurological disease among shipyard welders.
Evaluating health and safety experience of commercial janitors.
Developing accurate biomarkers for welding fume exposures, especially manganese.
Selected Publications

Peer Reviewed: Published

Neitzel R, Daniell WE, Sheppard L, Davies HW, Seixas NS.  Evaluation and Comparison of Three Exposure Assessment Techniques.  J Occup Environ Hyg 8(5):310-23, 2011 [PMID: 21491323].

Neitzel R, Daniell WE, Sheppard L, Davies HW, Seixas NS.  Improving Exposure Estimates by Combining Exposure Information. Ann Occup Hyg 55(5):537-47, 2011. [PMID: 21467124].

Neitzel R, Stover, B, Seixas, NS.   Longitudinal Assessment of Noise Exposure in a Cohort of Construction Workers.  Ann Occup Hyg 55(8):906-916 (2011) [PMID: 21825303].

Hobson A, Seixas NS, Sterling D, and Racette BA. Estimation of particulate mass and manganese exposure levels among welders. Ann Occup Hyg 55:113-125, 2011. [pmid : 20870928]

Seixas NS, Neitzel R, Stover B, Sheppard L, Daniell WE, Edelson J, Meischke H. A multi-component intervention to promote hearing protector use among construction workers. Internat J Audiology 55 :113-125, 2011. [pmid : 21091403]

Checkoway H, Ray RM, Lundin JI, Astrakianakis G, Seixas NS, Camp JE, Wernli KJ, Fitzgibbons ED, Li W, Feng Z, Gao DL, ThomasDB.  Lung Cancer and Occupational Exposures Other than Cotton Dust and Endotoxin among Women Textile Workers in Shanghai, China.  Occup Environ Med. (12)2010. [pmid : 21131604]

de Castro AB, Voss JG, Ruppin A, Dominguez CF, Seixas NS. Stressors among Latino day laborers. A pilot study examining allostatic load.  AAOHN J. 58:185-96. 2010.

Lowry SJ, Blecker H, Camp J, De Castro A, Hecker S, Arbabi S, Traven N, Seixas NS. Possibilities and Challenges in Occupational Injury Surveillance of Day Laborers.  Am J Indus Med, 53(2):126-34. 2009.

Hobson A, Sterling D, Emo B, Evanoff B, Sterling C, Good L, Seixas N, Checkoway H, Racette B.  Validity and Reliability of an Occupational Exposure Questionnaire for Parkinsonism in Welders. J Occup Environ Hyg, 6:324-331, 2009.

Edelson J, Neitzel R, Meischke H, Daniell W, Sheppard L, Stover B, Seixas N. Predictors of Hearing Protection Use in Construction Workers. Ann Occup Hyg, 53:605-616, 2009.

Griffin S, Neitzel R, Daniell W, Seixas, N. Indicators of Hearing Protection Use: Self-Report and Researcher Observation. J Occup Environ Hyg 6:639-647, 2009.

Neitzel R, Daniell WE, Meischke H, Sheppard L, Davies H, Seixas NS.  Comparison of perceived and quantitative measures of occupational noise exposure.  Ann Occup Hyg, 53:41-54, 2009.

Neitzel R, Seixas N, Harris MJ, Camp J. Exposure to fall hazards and safety climate in the aircraft maintenance industry. Journal of Safety Research 39:391-402, 2008.

Seixas NS, Blecker H, Camp J, Neitzel R. Occupational health and safety experience of day laborers in Seattle, WA. Am J Ind Med 51:399-406. 2008.  

Trabeau M, Neitzel R, Meischke H, Daniell W, Seixas N. An evaluation of Train the trainer vs. expert training modalities for hearing protection use in construction.  Am J Indus Med 51:130-137, 2008.

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