Colleen E. Bryan

Research Biologist, Chemical Sciences Division, NIST

colleen.bryan@nist.gov

Dr. Colleen Bryan is in the Inorganic Chemical Metrology Group at NIST Charleston, South

Carolina. She began her career at NIST in 2003 as a graduate student receiving a M.S. from

College of Charleston and Ph.D. from Medical University of South Carolina. Dr. Bryan’sresearch

focuses on the roles and impacts of toxic and nutritional trace elements in food and consumer

product safety; marine animal health; and mercury metrology. She has extensive experience in

method development and analysis of trace elements using ICP‐MS, ICP‐MS/MS, ID‐CV‐ICP‐MS,

and direct combustion AAS. Currently, Dr. Bryan isthe inorganic lead for NIST Quality Assurance

Programs (QAPs), the Inorganic Environmental Program Coordinator for reference materials,

and the Quality Manager for the Inorganic Chemical Metrology Group.
Carolyn Q. Burdette

Research Chemist, Chemical Sciences Division, NIST

carolyn.burdette@nist.gov

Carolyn has been a research chemist in the Chemical Sciences Division at the National Institute

of Standards and Technology (NIST) since 2015. She has been involved in the value assignment

of numerous clinical, food, and dietary supplement Standard Reference Materials (SRMs) and is

a co‐coordinator of the Dietary Supplement Laboratory Quality Assurance Program (DSQAP). Her

research focuses on the development of analytical techniques (LC‐UV, LC‐MS and MS/MS) for

the determination of marker compounds, vitamins, and vitamin metabolites in the clinical and

food/dietary supplement areas, as well as value assignment of NIST Standard Reference

Materials (SRMs). Her interests include improving the measurement capabilities of these

communities by the use of reference materials and quality assurance programs, and expand into

the analytical aspects of environmental and agricultural areas. Carolyn obtained a B.S. in

Chemistry from Winthrop University under the guidance or Dr. Cliff Calloway. She was also a 4‐ 

year member of the Winthrop Women’s Soccer Team. She then earned her Ph.D. in Analytical

Chemistry from Clemson University, under Dr. Ken Marcus.
W. Clay Davis

Research Chemist, Chemical Sciences Division, NIST

clay.davis@nist.gov

Clay Davisreceived his B.S. in chemistry from Georgia Southern University and Ph.D. from Clemson

University under the direction of Ken Marcus. Clay is currently a Research Chemist in the

Biochemical and Exposure Science Group at the National Institute of Standards and

Technology (NIST) in Charleston, SC. He first started at NIST as a National Research Council (NRC)

Postdoctoral Fellow to develop novel techniques to measure small molecule organometallic

species and metalloproteins using atomic and molecular mass spectrometry. Clay’s current work

sits broadly within analytical chemistry applied to investigating interesting biological questions

utilizing elemental, isotopic, and multi‐omic applications in proteomics, metabolomics and

lipidomics.
David L. (Dave) Duewer

Research Chemist, Chemical Sciences Division, NIST

david.duewer@nist.gov  

Dave is a chemical metrologist experienced in chemometrics, experimental design, exploratory

data analysis, graphical communications, interlaboratory comparisons, measurement

uncertainty, and quality assurance/control. He is an advocate for R&D at interfaces of chemistry,

biology, and measurement science. His current interests include better approaches to the:

evaluation of chemical purity, demonstration of comparability among reference materials that

nominally deliver the same measurands, and summarization of chemical data that have defined

measurement uncertainties.
Hugh V. Hayes

Research Chemist, Chemical Sciences Division, NIST

hugh.hayes@nist.gov

Hugh Hayes has been a Research Chemist at the National Institute of Standards and Technology

since 2018 where he focuses on developing analytical methods and reference materials for

botanical and vitamin‐based dietary supplementation. He also co‐leads the Dietary Supplement

Laboratory Quality Assurance Program (DSQAP) which supportsthe measurement needs within the

dietary supplement communities. Hugh has also developed multidimensional chromatographic

methods for the detection and identification of polycyclic aromatic hydrocarbons (PAHs) in

environmental samples. Hugh obtained a B.S. in Chemistry and a M.S. in Forensic Science from

Stevenson University. He then obtained a M.S. and a Ph.D. in Chemistry from University of Central

Florida. Hugh is also an Adjunct Professor in the Forensic Science graduate program at Stevenson

University.
Jenna R. Klingsick

Research Associate, Chemical Sciences Division, NIST  

jenna.klingsick@nist.gov

Jenna received her B.S. in Marine Biology from Nova Southeastern University and her M.S. in

Marine Biology from College of Charleston. Her graduate thesis, in collaboration with NOAA,

evaluated metals concentrations in river otters and bottlenose dolphins to determine if river

otters could be used as a sentinelspecies. Jenna has been working at NIST since 2022 as a research

associate in the Inorganic Chemical Metrology Group. Her research focuses on analysis of toxic

and nutritional elements in food and consumer products.
John L. Molloy

Research Chemist, Chemical Sciences Division, NIST

john.molloy@nist.gov

John has been a research chemist in the Chemical Sciences Division at the National Institute of

Standards and Technology (NIST) since 2007. He came to NIST after obtaining a B.S. in

Chemistry from Southwestern University and a Ph.D. in Analytical Chemistry from The

University of Texas at Austin. After coming to NIST John studied microheterogeneity in

reference materials using microbeam XRF and laser ablation ICP‐MS. John is currently serving

asthe deputy group leader for the Inorganic Chemical Metrology Group and istechnical project

leader for a wide variety of materials including single element solutions, water reference

materials and liquid fuel reference materials.
Bailey Moritz

Program Officer, Seaweed and Shellfish Farming, World Wildlife Foundation

bailey.moritz@wwfus.org

As the Program Officer for Seaweed and Shellfish Farming on the WWF‐US Aquaculture team,

Bailey supports the seaweed industry in reducing barriers to growth and advancement for climate

gains. Her current region of focus is the Eastern Pacific to the North Atlantic. She oversees grants

to community organizations and research institutes focused on projects ranging from the

ecosystem services of seaweed and shellfish farming to installing demonstration farms in new

communities. She develops workshops aimed at driving new markets for seaweed, including as a

livestock feed and alternative packaging material, bringing together stakeholders across the

respective value chains.

Bailey brings 10 years of marine science, education, and aquaculture experience. Prior to WWF,

Bailey ran a commercial kelp nursery and a research‐scale scallop farm in Maine. She has worked

on seaweed farming projects in coastal communities in Madagascar and Belize as part of her

graduate studies. Her research centered on a women’s association developing new seaweed‐

based products. She holds a BA in Earth & Oceanographic Science from Bowdoin College and a

Professional Science Masters in Ocean Food Systems from the University of New England.
Melissa M. Phillips

Research Chemist, Chemical Sciences Division, NIST

melissa.phillips@nist.gov

Melissa has been a research chemist in the Chemical Sciences Division at the National Institute of

Standards and Technology (NIST) since 2008. She has been involved in the value assignment of

numerous food and dietary supplement Standard Reference Materials (SRMs) and is a co‐ 

coordinator of the Food Nutrition and Safety Measurements Quality Assurance Program

(FNSQAP), the Food Reference Materials Program, and the NIST Food Safety Program. Her

interests include development of new analytical methods for the determination of marker

compounds, vitamins, and contaminants in foods and dietary supplements, and improving the

measurement capabilities of the food and dietary supplement communities using reference

materials and quality assurance programs. Melissa obtained a B.S. in Chemistry, an M.S. in Forensic

Chemistry, and a Ph.D. in Analytical Chemistry from Michigan State University. Melissa is chair of

the AOAC INTERNATIONAL Official Methods Board and is a fellow of AOAC INTERNATIONAL.
Catherine (Kate) Rimmer

Organic Chemical Metrology Group Leader, Chemical Sciences Division, NIST

catherine.rimmer@nist.gov

Kate Rimmer received her B.A. in Chemistry and Anthropology at the University of Vermont and

her Ph.D. in Analytical Chemistry from Florida State University. She joined NIST as a National

Research Council Postdoctoral Fellow. Kate has spent her career working to improve analytical

separations, designing and characterizing reference materials, and running interlaboratory

testing. She also has a passion for chemical education and science policy. Currently Kate serves as

the group leader for the Organic Chemical Metrology Group in the Chemical Sciences Division at

NIST.
Michael R. Winchester

Inorganic Chemical Metrology Group Leader, Chemical Sciences Division, NIST

mwinchester@nist.gov

Dr. Michael Winchester currently leads the Inorganic Chemical Metrology Group in the Chemical

Sciences Division of the National Institute of Standards and Technology (NIST), having been at NIST

for more than 30 years. This group is responsible for around 700 Standard Reference Materials

(SRMs) that are critical to industry,science, and technology. The group also has vigorous research

efforts in measurement approaches for nanoparticles, isotopes, and chemical oceanographic

parameters. He is also the current Chair of the Inorganic Analysis Working Group (IAWG) of the

international Consultative Committee for Amount of Substance in Chemistry and Biology (CCQM)

located at the International Bureau of Weights and Measures in Paris (BIPM). Finally, he serves as

the Convenor of Working Group 10 (Terminology) of ISO/TC334 Reference Materials.
Charles Yarish

Prof. Emeritus, University of Connecticut; Science Advisor, World Wildlife Foundation

charles.yarish@uconn.edu

Charles Yarish is a Prof. Emeritus at the University of Connecticut. He has worked in advancing the

global seaweed farming industry and spearheaded the developing kelp industry in Long Island

Sound, funded in large part the CT and the National Sea Grant Programs.  He has an extensive

publication record that spans decades, actively serves as a speaker and consultant, and has been

on the cutting edge ofresearch and development initiatives. He is credited for developing the global

and North American regenerative seaweed aquaculture industries including Integrated Multi‐

Trophic Aquaculture & nutrient bioextraction. He has been a national lecturer,secretary, a member

of the Phycological of America’s Executive Committee and President (2001). In 2019 he received

the Phycological Society of America’s Award of Excellence for his sustained scholarly contributions

in, and impact, on the field of phycology over his career. He is a visiting scientist at The Woods Hole

Oceanographic Institution and chief scientist for the GreenWave Organization.
Lee L. Yu

Research Chemist, Chemical Sciences Division, NIST

lee.yu@nist.gov

Lee joined the Inorganic Chemical Metrology Group of the National Institute of Standards and

Technology in Gaithersburg, Maryland after obtaining a Ph.D. in Chemistry from the University of

Missouri under the guidance of S. Roy Koirtyohann. He is experienced with trace‐level elemental

metrology. His research interests include high‐accuracy chemical metrology and hyphenated

techniques, especially separation and elemental detection techniques, for health markers in

specimens of environmental and biological importance. He is the technical project leader for the

development of several critical clinical and environmental standard reference materials (SRM)

including SRM 3232 Kelp Powder (Thallus laminariae).