CAPHLD Executive Council and Officers

Nicole M. Green, PhD, D(ABMM), President

Dr. Nicole Green is the Laboratory Director for the Los Angeles County Public Health Laboratory. She received a Bachelor of Science degree with Honors in Biology and a minor in Microbiology from California State University, Los Angeles. Her doctoral degree in Microbiology was awarded from the University of California, Davis. She has worked at a number of institutions including UC Davis, NIAID-NIH Rocky Mountain Laboratories, Baylor College of Medicine, and The Methodist Hospital Research Institute. Dr. Green completed a Lab Aspire fellowship through the UC Berkeley School of Public Health and the California Department of Public Health-Microbial Diseases Laboratory where she trained in public health and clinical microbiology. She joined the Los Angeles County Department of Public Health in 2010 as the Assistant Laboratory Director. In 2014, Dr. Green was awarded the Public Health Excellence award by the Department for her contributions and advancement of the public health laboratory. She is active in many professional societies including the Southern California American Society for Microbiology (SCASM) and Association of Public Health Laboratories (APHL). As an adjunct assistant professor at the UCLA Fielding School of Public Health, she is passionate about teaching and is committed to the workforce development of new public health and clinical microbiology professionals. Her research interests include molecular epidemiology, comparative genomics, and evaluation of new diagnostic methods. Nikki is a board-certified medical microbiologist, medical technologist, and public health microbiologist.

Denise VonBargen, MS, President Elect

Denise has been the laboratory director at the Ventura County Public Health Laboratory since 2015. She received her Bachelors of Science degree in Medical Microbiology and Bacteriology from San Diego State University. She has over 20 years’ experience as a Public Health Microbiologist. Denise has previously worked in the pharmaceutical industry and as a sales representative. She enjoys teaching and works to ensure that the next generation of public health microbiologists trained in her laboratory have a solid foundation in microbiology.

Megan Crumpler, PhD, D(ABMM), Secretary-Treasurer

Dr. Megan Crumpler received her bachelor’s degree in Microbiology and Cell Science from the University of Florida in Gainesville, FL. She obtained her PhD in Microbiology and Immunology from the Virginia Commonwealth University (VCU) in Richmond, VA where she studied the immune evasion techniques of Cytomegalovirus on guinea pigs. She successfully completed the doctoral program in 2008 and went on to do a one-year post-doctoral fellowship at VCU in the Infectious Disease division where she studied inflammatory markers released in HIV-infected patients. In 2009, she moved to California and assumed a Supervising Public Health Microbiologist (PHM) position at the Riverside County Public Health Laboratory while training towards her PHM certification. Shortly after becoming a certified PHM, Dr. Crumpler was promoted to Assistant Laboratory Director in September 2011. In May 2014, Dr. Crumpler completed her laboratory director training and was board certified by the American Board of Bioanalysis as a High-Complexity Clinical Laboratory Director. Dr. Crumpler is an active member of CAPHLD and currently serves as co-chair of its Training Committee, a member of CAPHLD’s Program Planning Committee,  and CAPHLD’s representative to the CA Department of Public Health’s Reportable Diseases Subcommittee.

Godfred Masinde, PhD, HCLD(ABB), Historian, Representative at Large (North)

Dr. Godfred Masinde is presently the Public Health Laboratory Director for City and County of San Francisco Public Health Laboratory, San Francisco, California. He is responsible for overall administration and management of SF Public Health Laboratory. Dr. Masinde holds: BS (Zoology) and MS(Medical Parasitology/Immunology) from University of Nairobi-Kenya, a PhD in Medical/Molecular Microbiology from Tulane University in New Orleans, LA, and MBA (Marketing) from Baker College in Flint, Michigan. He also holds the following certifications: Public Health Microbiologist (State of California), High Complexity Laboratory Director (ABB), Molecular Biologist (ASCP), Microbiologist (ASCP), Clinical Microbiology Specialist (State of CA) and Clinical Microbiologist (Director) (State of CA). 

Errin Rider, PhD, D(ABMM) Representative at Large (South)

Dr. Errin Rider earned a Bachelors in Science in Biology from San Diego State University followed by earning a Ph.D. in Virology from Harvard University in 2008.  Following graduation, Dr. Rider was awarded a post-doctoral fellowship at the California Department of Public Health where she trained as a Lab Aspire Fellow in Clinical and Public Health Microbiology.  She went on to become the Assistant Laboratory Director of the Louisiana Office of Public Health Laboratories from 2013-2018, and in 2018 relocated back to California to become the Laboratory Director of the Riverside County Public Health Laboratory.  Dr. Rider is a diplomat of the American Board of Medical Microbiology (ABMM) and also has national certification in Clinical Microbiology, as well as is certified by the State of California as a Public Health Microbiologist. 

Jennie Vongvith, Recording Secretary

Jennie Vongvith is an Administrative Assistant III at the County of Los Angeles Department of Children and Family Services (DCFS). With a positive and enthusiastic outlook, Jennie supervises a team of buyers in the DCFS Procurement Unit and hopes to contribute to the DCFS Materials Management Section’s mission of having the Best Procurement Unit in the County of Los Angeles.


Jennie received her Bachelor of Arts degree in English Literature with a Minor in East Asian Languages at the University of California, Los Angeles in 2004. In 2007, she returned to academia to obtain her Masters in Business Administration at the University of Phoenix. After receiving her MBA, Jennie has been working in as a public servant for over ten years.


Jennie is an active member of CAPHLD, and she is proud to be able to assist California’s Laboratory Directors in educating and advocating new technologies and studies in Public Health Laboratories.

Jeremy Corrigan, Comptroller

Jeremy Corrigan is the Laboratory Manager of the Humboldt County Public Health Laboratory (HCPHL). Originally from Alaska, Jeremy moved to California in 1999 to attend Humboldt State University. In 2004, he received his Bachelor of Science degree in Cellular and Molecular Biology with a minor in Chemistry. Thereafter, he volunteered at the Child Family Health International (CFHI) Global Health Education Program in South Africa where he received his first exposure to the core mission and functions of public health and field experience in global health. Jeremy came back to California to train as a Public Health Microbiologist and obtained his certificate in 2007. He was hired at Sonoma County Public Health Laboratory and worked there as a microbiologist for 3 years. In 2010, Jeremy returned to Humboldt State University to get his Master of Science degree in Biology where he wrote his thesis on, “Investigation of Spotted Fever Group Rickettsia in Dogs and Ticks in Northern California.” Subsequently, Jeremy was hired at Humboldt County Public Health Laboratory where he now serves as its Laboratory Manager, ELAP Laboratory Director, and Bioterrorism Coordinator. Jeremy is an active member of CAPHLD. He has served on the Training Committee and currently serves as CAPHLD’s Comptroller, a member of the Program Planning Committee. He has a strong interest in molecular diagnostics and laboratory bioterrorism preparedness and has developed several assays including multiplex Vibrio parahaemolyticus (Vp) PCR assay for the detection of pathogenic Vp in oysters, and microbial source tracking assays for monitoring recreational waterways. As a LabAspire fellow, Jeremy is on the Doctorate of Public Health Laboratory Science program at the University of South Florida. His goal is to obtain his Dr.P.H., become board certified, and become one of California’s Public Health Laboratory Directors.

Michael Edwards, PhD, Auditor

Dr. Michael Edwards has been the laboratory director for San Joaquin County Public Health Laboratory since 2017. He previously worked at Napa-Yolo-Solano-Marin Public Health Laboratory as the Assistant Laboratory Director. Dr. Edwards is an active member of the CAPHLD Training Committee. 

Donna Ferguson, PhD, Historian

Donna Ferguson has been the Laboratory Director for Monterey County Public Health Laboratory since May 2016. After receiving a B.S. in Microbiology with honors from California State University, Long Beach in 1986, Donna began her career as a Public Health Microbiologist (PHM) at Orange County Public Health Laboratory (OCPHL). In 1988, she worked at San Diego Public Health Laboratory as a PHM. In 1993, Donna received M.S. in Epidemiology from UCLA and worked at Metropolitan Water District of Southern California on waterborne pathogen detection methods and investigations at drinking water reservoirs. In 2002, she returned to OCPHL to supervise the Water Quality Laboratory and oversee Microbial Source Tracking (MST) related research projects. From 2007 - 2013, she worked as a research microbiologist at Southern California Coastal Water Project on MST studies. In 2009, she received a Lab Aspire fellowship at the UCLA Fielding School of Public Health and in 2014, Donna graduated with honors with a doctoral degree in Environmental Health Sciences. Her dissertation studies included characterizing Enterococcus species using phenotypic and genotypic methods to assess potential sources of pollution to water and associated human health risks. In 2014, Donna worked at Placer County Public Health Laboratory as the Laboratory Supervisor and Bioterrorism Coordinator. In 2015, she became the Assistant Laboratory Director at Monterey County Public Health Laboratory.

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