Kevin Riley

Kevin Riley is the Director at LOSH. With over a decade of experience conducting worker- and community-engaged research and worker training initiatives, he leads LOSH efforts to investigate job hazards among workers in various industries and sectors, with the goal of informing public policy and improving workplace health and safety programs. His work has examined the injury experiences of workers in the low-wage labor market, community-level associations between heat-related hospitalizations and outdoor work, and workers’ compensation eligibility and access among residential day laborers and domestic workers. His interests also include the history of occupational safety and health policies and activism.

Kevin serves as principal investigator for the Western Region Universities Consortium (WRUC), a partnership of four university-based hazardous materials (HAZMAT) training programs funded by the National Institute of Environmental Health Sciences (NIEHS) Worker Training Program. In this role, he has led training initiatives on infectious disease hazards for healthcare workers in California as well as several projects to evaluate the impacts of HAZMAT training on workers and managers.

He holds a PhD in sociology and a master’s in public health, both from UCLA.

Additional Publications:

Kevin Riley, Jennifer Nazareno, and Sterling Malish. 24-Hour Care: Work and Sleep Conditions among Migrant Filipino Live-in Caregivers in Los AngelesAmerican Journal of Industrial Medicine59(12), 1120-1129, 2016.

Kevin Riley and Doug Morier. Patterns of Work-Related Injury and Common Injury Experiences of Workers in the Low-Wage Labor Market. Report to the Commission on Health and Safety and Workers’ Compensation, California Department of Industrial Relations. Los Angeles: UCLA Labor Occupational Safety and Health Program. 2015.

Kevin Riley, Carol Rice, Mitchel Rosen, Craig Slatin, Linda Alerding, Jane Fleishman, B. Louise Weidner, and Linda Delp. Managers’ Perceptions of the Value and Impact of HAZWOPER Worker Health and Safety TrainingAmerican Journal of Industrial Medicine, 58(7): 780-787, 2015.

Linda Delp and Kevin Riley. Worker engagement in the health and safety regulatory arena under changing models of worker representationLabor Studies Journal40(1): 54-83, 2015.

Kevin Riley. Driving on speed: Long-haul truck drivers and amphetamines in the postwar periodLabor: Studies in Working-Class History of the Americas, 11(4): 63-90, 2014.

Linda Delp, Kevin Riley, Sarah Jacobs, Diane Bush, Kathy Kirkland, Ingrid Denis, Matt London, and Robert Harrison. Shaping the future: Ten years of the Occupational Health Internship ProgramNew Solutions, 23(2) 253-281, 2013.

Kevin Riley. Health and safety. Entry for SAGE Sociology of Work Encyclopedia, Vicki Smith and J. Geoffrey Golson (eds.), 2013.

Kevin Riley, Linda Delp, Deogracia Cornelio, and Sarah Jacobs. From agricultural fields to urban asphalt: The role of worker education to promote California’s Heat Illness Prevention StandardNew Solutions, 22(3) 297-323, 2012.

Paul Landsbergis, Joseph Grzywacz, Anthony LaMontagne, Carles Muntaner, Joan Benach, Jane Lipscomb, Jeffrey Johnson, Peter Schnall, Kevin Riley, Ellen Rosskam, and Jennifer Zelnick. Work Organization, Job Insecurity, and Occupational Health Disparities. Issue Paper for Discussion at the Eliminating Health and Safety Disparities at Work Conference, Chicago, Illinois, September 14 and 15, 2011.

Kevin Riley and Lauren Appelbaum. OSHA at 40: Looking Back, Looking Ahead. UCLA Institute for Research on Labor and Employment, Research & Policy Brief No. 8, April 2011.

Niklas Krause

Dr. Krause is the former Director of the NIOSH Southern California Education and Research Center and Professor in Environmental Health Sciences at UCLA. Before his appointment at UCLA, Dr. Krause has been associate professor in residence in the Division of Occupational and Environmental Medicine of the Department of Medicine at the University of California San Francisco. He received his medical degree and a doctoral degree in orthopedic medicine from the University of Hamburg, Germany, and a doctoral degree in epidemiology from the University of California Berkeley. Dr. Krause retired from UCLA in 2021 but remains an emeritus member.

Patrick Dowling

Patrick T. Dowling, M.D., M.P.H. Bio Sketch Patrick T. Dowling, MD, MPH is the Kaiser Permanente Endowed Professor of Community Medicine and Chair of the UCLA Dept. of Family Medicine. A graduate of the Medical College of Ohio and the University Of Michigan School of Public Health, he completed his residency training in Family Medicine at Cook County Hospital in Chicago under Jorge Prieto, MD and Michael Stocker, MD. He is board certified in Family Medicine, Preventive Medicine and Public Health. Prior to joining UCLA as the first permanent Chair of Family Medicine in 1998, Dr. Dowling directed Family Medicine Residency training programs at Cook County Hospital, Brown University in Rhode Island and at Harbor-UCLA Medical Center. He has served on the National Advisory Council of the National Health Service Corps, as a Commissioner of Public Health for LA County and is presently a member of the Board of Trustees of the Drew University of Medicine and Science in South-Central LA. His professional interests include health policy, the science of health care delivery and the provision of care to underserved and minority communities. A common thread in his career has been the linkage of graduate medical education to underserved communities as a means to improve access and reduce health outcomes disparities among racial and ethnic minorities. Further, his research interests include chronic disease management, cross cultural and bi-national medicine and the integration of substance abuse treatment programs within primary care. He is Co-founder and Associate Director of the UCLA Department of Family Medicine IMG program, an innovative program to prepare bilingual (English-Spanish) International Medical Graduates (IMGs) to become eligible for licensure and residency training in Family Medicine in California. Ever since his days as Medical Director of the United Farm Workers Clinics (UFW) under Cesar Chavez in California?s Coachella and Imperial valleys he has believed that health care is a unique social goal and basic right. He remains optimistic that President Obama and the Congress will finally do what 7 presidents since Franklin Roosevelt tried and failed, that is to provide universal coverage for all, like the rest of the industrialized world.

Candace Tsai

Dr. Candace Tsai is an Associate Professor in the Department of Environmental Health Sciences at UCLA. She is a Certified Industrial Hygienist (CIH) and has several years of practical experience in industry and business settings.  She has been working on multidisciplinary research projects and collaborates with scientists in the U.S. and internationally.  She has applied her expertise in research and teaching, in the fields of health science, aerosol science, toxicology, engineering, human protection, and policy. She serves as a board member in the Sustainable Nanotechnology Organization, as Associate Editor for Journal of Nanoparticle Research, and on the Editorial Advisory Board for ACS Chemical Health and Safety Journal. With her special expertise in nanomaterials, she has served as an expert for the International Organization for Standardization (ISO) and the World Health Organization (WHO) in the nanotechnology programs and she currently serves as a Threshold Limit Value (TLV) committee candidate for the American Conference of Governmental Industrial Hygienists (ACGIH).


Ellenbecker, M.J., and Tsai, S., Health and Safety Considerations for Working with Engineered Nanoparticles, Wiley Interscience, 2015.

Peer-Reviewed Journal Articles

Tsai, C.S.J.*, Shin, N., Brune, J., Evaluation of sub micrometer sized particles generated from diesel locomotive and drilling within an experimental underground mine, Annals of Work Exposures and Health, July 28, 2020.

Back, D., Theisen, D., Seo, W., Tsai, C.S.J.*, Janes, D.*, Development of Interdigitated Capacitive Sensor for Real-time Monitoring of Sub-micron and Nanoscale Particulate Matters in Personal Sampling Device for Mining Environment, IEEE Sensors Journal, May 20, 2020.

Calcaterra, H., Shin, N., Quirk, P., Tsai, C.S.J.*, Low Concentration Analysis of Silver Nanoparticles in Consumer Spray Products, Atmosphere, 11, 403, April 17, 2020.

Khattak, J., Theisen, D., Tsai, C.S.J.*, Sampling Techniques on Collecting Fine Carbon Nanotube Fibers for Exposure Assessment, Scientific Reports, 9, article number: 7137, 2019.

Shin, N., Velmurugan, K., Su, C., Bauer, A., Tsai, C.S.J.*, Assessment of fine particles emitted during paper printing and shredding processes, Environmental Science: Processes & Impacts, 21, 1342-1352, 2019.

Tsai, C.S.J.*, Theisen, D., A sampler designed for nanoparticles and respirable particles with direct analysis feature, Journal of Nanoparticle Research, 20:209, 2018.

Ellenbecker, M., Tsai, C.S.J., Jacobs, M., Riedeker, M., Peters, T., Liou, S., Avila, A., Foss-Hanson, S., The difficulties in establishing an occupational exposure limit for carbon nanotubes, Journal of Nanoparticle Research, 20:131, 2018.

Pastrana, H., Avila, A., Tsai, C.S.J.*, Nanomaterials in cosmetics products: the challenges with regard to current legal frameworks and consumer exposure, NanoEthics, Aug. 12(2), 2018.

Lo, L., Tsai, C.S.J.*, Heitbrink, W., Dunn, K., Topmiller, J., Ellenbecker, M., Particle emissions from laboratory activities involving carbon nanotubes, Journal of Nanoparticle Research, 19:293, 2017.

Tsai, S.*, Shin, N., Castano, A., Khattak, J., Wilkerson, A., Lamport, N., A pilot study on particle emission from printer paper shredders, Aerosol Science and Technology, 1-12, 2017.

Shinde, A., Tsai, S.*, Toxicity mechanism in fetal lung fibroblast cells for multi-walled carbon nanotubes defined by chemical impurities and dispersibility, Toxicology Research, 5:248-258, 2016.

Tsai, S.*, Dysart, A., Beltz, J., Pol, V., Identification and mitigation of generated solid by-products during advanced electrode materials processing, Environmental Science and Technology, 50(5):2627-2634, 2016.

Tsai, S.*, Contamination and release of nanomaterials associated with the use of personal protective clothing, Annals of Occupational Hygiene, 59(4):491-503, 2015.

Tsai, S.*, Hofmann, M., Kong, J., Hallock, M., Ada, E., Ellenbecker, M., Assessment of exhaust emissions from carbon nanotube production and particle collection by sampling filters, Journal of the Air & Waste Management Association, 65(11):1376-1385, 2015.

Liou, S.H., Tsai, S., Pelclova, D., Schubauer-Berigan, M., Schulte, P., Assessing the first wave of epidemiological studies of nanomaterial workers, Journal of Nanoparticle Research, 17:413, 2015.

Lo, L., Tsai, S.*, Dunn, K., Hammond, D., Marlow, D., Topmiller, J., Ellenbecker, M., Performance of particulate containment at nanotechnology workplaces, Journal of Nanoparticle Research, 17:435, 2015.

Gordon, S., Butala, J., Carter, J., Elder, A., Gordon, T., Gray, G., Sayre, P., Schulte, P., Tsai, S., West, J., Workshop report: strategies for setting occupational exposure limits for engineered nanomaterials, Regulatory Toxicology and Pharmacology, 68:305-311, 2014.

Dunn, K., Tsai, S., Woskie, S., Bennett, J., Garcia, A., Ellenbecker, M., Evaluation of leakage from fume hoods using tracer gas, tracer nanoparticles and nanopowder handling test methodologies, Journal of Occupational and Environmental Hygiene, 11(10):D164-D173, 2014.

Tsai, S.*, Echevarría-Vega, M., Sotiriou, G., Santeufemio, C., Schmidt, D., Demokritou, P., Ellenbecker, M., Evaluation of environmental filtration control to engineered nanoparticles using the Harvard versatile engineered nanomaterial generation system (VENGES), Journal of Nanoparticle Research, 14:812, 2012.

Ellenbecker, M., Tsai, S., Engineered nanoparticles: safer substitutes for toxic materials, or a new hazard? Journal of Cleaner Production, 19(5):483-487, 2011.

Tsai, S.*, Huang, R.F., Ellenbecker, M., Airborne nanoparticle exposures while using conventional, constant velocity and air-curtain isolated hoods, Annals of Occupational Hygiene, 54(1):78-87, 2010.

Tsai, S.*, Ada, E., Isaacs, J., Ellenbecker, M., Airborne nanoparticle exposures associated with the manual handling of nanoalumina and nanosilver in fume hoods, Journal of Nanoparticle Research, 11(1):147-161, 2009.

Tsai, S.*, Hofmann, M., Kong, J., Hallock, M., Ada, E., Ellenbecker, M., Characterization and evaluation of nanoparticle release during the synthesis of single-walled and multi-walled carbon nanotubes by chemical vapor deposition, Environmental Science and Technology, 43(15):6017-6023, 2009.

More Publications at Google Scholar

Jian Li

Li has joined in UCLA as a professor from 2019. He shares a position between the Fielding School of Public Health, Environmental Health Sciences Department and the School of Nursing. Before his appointment at UCLA, Dr. Li had been working in China and Germany with extensive experience on occupational health. He is an active member of the International Commission on Occupational Health (ICOH) Scientific Committees on Cardiology in Occupational Health, and on Work Organisation and Psychosocial Factors. During 2006-2010, Dr. Li received three Early Career Awards from the US National Institute for Occupational Safety and Health (NIOSH) and other international research societies. Dr. Li’s research interests are psychosocial factors, work stress and health, particularly on epidemiology and intervention evaluation. He has published more than 100 scientific articles in peer-reviewed journals.

Additional Publications

FADEL M, SEMBAJWE G, GAGLIARDI D, PICO F, LI J, OZGULER A, SIEGRIST J, EVANOFF BA, BAER M, TSUTSUMI A, IAVICOLI S, LECLERC A, ROQUELAURE Y, DESCATHA A. Association Between Reported Long Working Hours and History of Stroke in the CONSTANCES Cohort. Stroke. 2019 Jul;50(7):1879-1882.

LI J, ATASOY S, FANG X, ANGERER P, LADWIG KH. Combined Effect of Work Stress and Impaired Sleep on Coronary and Cardiovascular Mortality in Hypertensive Workers: The MONICA/KORA Cohort Study. European Journal of Preventive Cardiology, online published on 2019 Apr 27:2047487319839183. doi: 10.1177/2047487319839183.

MUTAMBUDZI M, THEORELL T, LI J. Job Strain and Long-Term Sickness Absence from Work – A Ten-Year Prospective Study in German Working Population. Journal of Occupational and Environmental Medicine, 2019, 61 (4): 278-284.

LI J, SIEGRIST J. The Role of Compensation in Explaining Harmful Effects of Overtime Work on Self-reported Heart Disease: Preliminary Evidence from a Germany Prospective Cohort Study. American Journal of Industrial Medicine, 2018, 61 (10): 861-868.

LI J, BIDLINGMAIER M, PETRU R; PEDROSA GIL F; LOERBROKS A; ANGERER P. Impact of Shift Work on the Diurnal Cortisol Rhythm: A One-year Longitudinal Study in Junior Physicians. Journal of Occupational Medicine and Toxicology, 2018, 13: 23.

LI J, BRISSON C, CLAYS E, FERRARIO MM, IVANOV ID, LANDSBERGIS P, LEPPINK N, PEGA F, PIKHART H, PRÜSS-ÜSTÜN A, RUGULIES R, SCHNALL PL, STEVENS G, TSUTSUMI A, UJITA Y, SIEGRIST J. WHO/ILO Work-related Burden of Disease and Injury: Protocol for Systematic Reviews of Exposure to Long Working Hours and of the Effect of Exposure to Long Working Hours on Ischaemic Heart Disease. Environment International, 2018, 119: 558-569.

KAEWBOONCHOO O, SEMBAJWE G, LI J. Associations between Job Strain and Arterial Stiffness: A Large Survey among Enterprise Employees from Thailand. International Journal of Environmental Research and Public Health, 2018, 15 (4). pii: E659.

WEGE N, LI J, SIEGRIST J. Are There Gender Differences in Associations of Effort-Reward Imbalance at Work with Self-Reported Doctor-Diagnosed Depression? Prospective Evidence from the German Socio-Economic Panel. International Archives of Occupational and Environmental Health, 2018, 91 (4): 435-443.

BECHER H, DOLLARD MF, SMITH P, LI J. Predicting Circulatory Diseases from Psychosocial Safety Climate: A Prospective Cohort Study from Australia. International Journal of Environmental Research and Public Health, 2018, 15 (3). pii: E415.

MAUSS D, HERR RM, THEORELL T, ANGERER P, LI J. Validating the Demand Control Support Questionnaire among White-Collar Employees in Switzerland and the United States. Journal of Occupational Medicine and Toxicology, 2018, 13: 7.

MUTAMBUDZI M, SIEGRIST J, MEYER JD, LI J. Association between Effort-Reward Imbalance and Self-Reported Diabetes Mellitus in Older U.S. Workers. Journal of Psychosomatic Research, 2018, 104: 61-64.

ZHANG M, LOERBROKS A, LI J. Job Burnout Predicts Decline of Health-Related Quality of Life among Employees with Cardiovascular Disease: A One-Year Follow-Up Study in Female Nurses. General Hospital Psychiatry, 2018, 50: 51-53.

HERR RM, ALMER C, LOERBROKS A, BARRECH A, ELFANTEL I, SIEGRIST J, GÜNDEL H, ANGERER P, LI J. Associations of Work Stress with Hair Cortisol Concentrations – Initial Findings from a Prospective Study. Psychoneuroendocrinology, 2018, 89: 134-137.

HERR RM, LI J, LOERBROKS A, ANGERER P, SIEGRIST J, FISCHER JE. Effects and Mediators of Psychosocial Work Characteristics on Somatic Symptoms Six Years Later: Prospective Findings from the Mannheim Industrial Cohort Studies (MICS). Journal of Psychosomatic Research, 2017, 98: 27-33.

FERRARIO MM, LANDSBERGIS P, TSUTSUMI A, LI J, HYNEK P, KRAUSE N, SMITH P, HOLTERMANN A, CLAYS AE; ICOH Scientific Committee on Cardiology in Occupational Health. Work Environment: An Opportunity for Ground-Breaking Collaborations in Cardiovascular Disease Prevention. European Journal of Preventive Cardiology, 2017, 24 (2_suppl): 4-6.

ANGERER P, SCHMOOK R, ELFANTEL I, LI J. Night Work and the Risk of Depression: A Systematic Review. Deutsches Ärzteblatt International, 2017, 114 (24): 404-411.

LI J, RIEDEL N, BARRECH A, HERR RM, AUST B, MÖRTL K, SIEGRIST J, GÜNDEL H, ANGERER P. Long-Term Effectiveness of a Stress Management Intervention at Work: A 9-Year Follow-Up Study Based on a Randomized Wait-List Controlled Trial in Male Managers. BioMed Research International, 2017, 2017: 2853813.

RIEDEL N, LOERBROKS A, BOLTE G, LI J. Do Perceived Job Insecurity and Annoyance due to Air and Noise Pollution Predict Self-Rated Poor Health? A Prospective Analysis of Independent and Joint Associations Using a German National Representative Cohort Study. BMJ Open, 2017, 7 (1): e012815.

RIEDEL N, SIEGRIST J, WEGE N, LOERBROKS A, ANGERER P, LI J. Do Effort and Reward at Work Predict Changes in Cognitive Function? First Longitudinal Results from the Representative German Socio-Economic Panel. International Journal of Environmental Research and Public Health, 2017, 14 (11). pii: E1390.

WEGE N, ANGERER P, LI J. Effects of Lifetime Unemployment Experience and Job Insecurity on Two-Year Risk of Physician-Diagnosed Incident Depression in the German Working Population. International Journal of Environmental Research and Public Health, 2017, 14 (8). pii: E904.

LI J, RIEDEL N, BARRECH A, HERR RM, AUST B, MÖRTL K, SIEGRIST J, GÜNDEL H, ANGERER P. Nine-Year Longitudinal Psychosocial and Mental Outcomes of a Stress Management Intervention at Work Using Psychotherapeutic Principles. Psychotherapy and Psychosomatics, 2017, 86 (2): 113-115.

SIEGRIST J, LI J. Work Stress and Altered Biomarkers: A Synthesis of Findings Based on the Effort-Reward Imbalance Model. International Journal of Environmental Research and Public Health, 2017, 14 (11). pii: E1373.

LI J, LOERBROKS A, BOSMA H, ANGERER P. Work Stress and Cardiovascular Disease: A Life Course Perspective. Journal of Occupational Health, 2016, 58 (2): 216-219.

LOERBROKS A, SHANG L, ANGERER P, LI J, CHINESE NEXT STUDY GROUP. Psychosocial Work Characteristics and Needle Stick and Sharps Injuries among Nurses in China: A Prospective Study. International Archives of Occupational and Environmental Health, 2015, 88 (7): 925-932.

LI J, DOLLARD MF, LOERBROKS A, ANGERER P. Cardiovascular Disease is Associated with the Perception of Worsening Psychosocial Work Characteristics. International Journal of Cardiology, 2015, 186: 149-151.

LOERBROKS A, SHANG L, ANGERER P, LI J. Effort-Reward Imbalance at Work Increases the Risk of the Metabolic Syndrome: A Prospective Study in Chinese University Staff. International Journal of Cardiology, 2015, 182: 390-391.

LI J, ZHANG M, LOERBROKS A, ANGERER P, SIEGRIST J. Work Stress and the Risk of Recurrent Coronary Heart Disease Events: A Systematic Review and Meta-Analysis. International Journal of Occupational Medicine and Environmental Health, 2015, 28 (1): 8-19.

LOERBROKS A, WEIGL M, LI J, GLASER J, DEGEN C, ANGERER P. Workplace Bullying and Depressive Symptoms: A Prospective Study among Junior Physicians in Germany. Journal of Psychosomatic Research, 2015, 78 (2): 168-172.

LOERBROKS A, BOSCH JA, DOUWES J, ANGERER P, LI J. Job Insecurity is Associated with Adult Asthma in Germany during Europe’s Recent Economic Crisis: A Prospective Cohort Study. Journal of Epidemiology and Community Health, 2014, 68 (12): 1196-1199.

JARCZOK MN, JARCZOK M, MAUSS D, KOENIG J, LI J, HERR RM, THAYER JF. Autonomic Nervous System Activity and Workplace Stressors – A Systematic Review. Neuroscience & Biobehavioral Reviews, 2013, 37 (8): 1810-1823.

LI J, WEIGL M, GLASER J, PETRU R, SIEGRIST J, ANGERER P. Changes in Psychosocial Work Environment and Depressive Symptoms: A Prospective Study in Junior Physicians. American Journal of Industrial Medicine, 2013, 56 (12): 1414-1422.

GALATSCH M, LI J, DERYCKE H, MÜLLER BH, HASSELHORN HM. Effects of Requested, Forced and Denied Shift Schedule Change on Work Ability and Health of Nurses in Europe – Results from the European NEXT-Study. BMC Public Health, 2013, 13: 1137.

LI J, JARCZOK MN, LOERBROKS A, SCHÖLLGEN I, SIEGRIST J, BOSCH JA, WILSON MG, MAUSS D, FISCHER JE. Work Stress is Associated with Diabetes and Prediabetes: Cross-Sectional Results from the MIPH Industrial Cohort Studies. International Journal of Behavioral Medicine, 2013, 20 (4): 495-503.

LI J, SHANG L, GALATSCH M, SIEGRIST J, MÜLLER BH, HASSELHORN HM, NEXT STUDY GROUP. Psychosocial Work Environment and Intention to Leave the Nursing Profession: A Cross-National Prospective Study of Eight Countries. International Journal of Health Services, 2013, 43 (3): 519-536.

LI J, GALATSCH M, SIEGRIST J, MÜLLER BH, HASSELHORN HM, EUROPEAN NEXT STUDY GROUP. Reward Frustration at Work and Intention to Leave the Nursing Profession – Prospective Results from the European Longitudinal NEXT Study. International Journal of Nursing Studies, 2011, 48 (5): 628-635.

LI J, FU H, HU Y, SHANG L, WU YH, KRISTENSEN TS, MUELLER BH, HASSELHORN HM. Psychosocial Work Environment and Intention to Leave the Nursing Profession: Results from the Longitudinal Chinese NEXT Study. Scandinavian Journal of Public Health, 2010; 38 (Suppl 3): 69-80.

LI J, YANG W, CHO SI. Gender Differences in Job Strain, Effort-Reward Imbalance, and Health Functioning among Chinese Physicians. Social Science & Medicine, 2006, 62 (5): 1066-1077.

LI J, YANG W, CHENG Y, SIEGRIST J, CHO SI. Effort-Reward Imbalance at Work and Job Dissatisfaction in Chinese Healthcare Workers: a Validation Study. International Archives of Occupational and Environmental Health, 2005, 78 (3): 198-204.

LI J, YANG W, LIU P, XU Z, CHO SI. Psychometric Evaluation of the Chinese (Mainland) Version of Job Content Questionnaire: a Study in University Hospitals. Industrial Health, 2004, 42 (2): 260-267.

Shane Que Hee

Professor of Environmental Health Sciences (EHS) and a faculty member of the UCLA Center for Occupational and Environmental Health (COEH), came to the Department in 1989 from the University of Cincinnati where he had been Assistant and Associate Professor since 1978. As of the end of 2010, he had 161 peer-reviewed publications including 126 in peer-reviewed journals, 25 book chapters, 4 books, six EPA criteria documents,134 national & international meeting presentations, and 46 keynote addresses at international and national meetings. In addition, he has had 41 grants awarded as Principal Investigator at UCLA. He has organized 13 scientific roundtables and symposia at national and international meetings. He is a Fellow of the American Institute of Chemists and the American Industrial Hygiene Association. He formed the first national committee for risk assessment of skin absorbed chemicals. He reviews for many journals, and many government agencies. He has been a member of TOXNET, the NIOSH Board of Advisors, and currently reviews for the National Toxicology Program.