EMAP Program Director:    YuYe J. Tong, Doc ès sci; Professor of Chemistry
EMAP Director of Graduate Studies:    Phil Hagan, J.D., M.B.A., M.P.H.
EMAP Metrology Lab Director:    tbd
EMAP Administrative Manager:   tbd

A photograph of Georgetown University's Healy Hall and the Lauinger Library building, as seen from the Potomac River bank.


Department of Chemistry Faculty

YuYe J. Tong, Ph.D., Professor, Department of Chemistry
Steven Metallo, Ph.D., Associate Professor, Department of Chemistry
Sarah Stoll, Ph.D., Associate Professor, Department of Chemistry

Department of Human Science Faculty

Phil Hagan, J.D., M.B.A., M.P.H., Assistant Professor, Department of Human Science
Rosemary K. Sokas, M.D. M.S., M.Occ.H., Professor, Department of Human Science

Department of Microbiology & Immunology

A. Alan Mohhissi, Ph.D., Adjunct Professor; and President of the Institute for Regulatory Science

A sign reading National Institutes of Standards and Technology in a landscaped garden space at the NIST Gaithersburg, Maryland campus.


Carlos Gonzalez, Ph.D., Chief, Chemical Sciences Division
Dr. Gonzalez joined NIST in 1997 as a member of the Computational Chemistry Group within the Physical and Chemical Properties Division. Dr. Gonzalez was appointed to the position of Chief, Chemical and Biochemical Reference Data Division in 2008. In 2012, Dr. Gonzalez was appointed to the position of Chief, Chemical Sciences Division.

Katrice Lippa, Ph.D., Scientific Advisor, Chemical Sciences Division
Dr. Katrice Lippa presently serves as the group leader of the Organic Chemical Measurement Science Group. Before that, she was Scientific Advisor for the Chemical Sciences Division to develop and promote reference material and data products together with chemical informatics tools that will span and connect divisional project areas (clinical, metabolomics, forensics, environmental and chemical manufacturing). She also represents NIST in the InterAmerican Metrology System (SIM) and the Consultative Committee for Amount of Substance-Metrology in Chemistry (CCQM) to develop metrology tools for traceability and to establish equivalence among measurements made by national metrology institutes (NMIs). Her current research directions are in quantitative NMR techniques for the characterization of pure substances as well as organic constituents in biological and natural matrices, in addition to advancing metrologically-sound methods for ensuring chemical traceability. As a research analytical chemist, Katrice has extensive experience in trace-level environmental organic measurement techniques (chromatography-mass spectrometry) and implementation of structure-reactivity/molecular modeling tools to help solve chemical measurement problems.

Jeanita Pritchett, Ph.D., Research Chemist
Dr. Jeanita Pritchett is a research chemist in the Chemical Sciences Division and an adjunct chemistry lecturer at Montgomery College. Jeanita is actively involved educational outreach activities, and has served as a U.S. Embassy Science fellow at Scifest Africa (South Africa’s largest national science festival) where she developed and presented interactive STEM-related workshops. Her research focuses on clinical chemistry and the metrology of drug analysis in consumer products and forensic applications.

Antonio Possolo, Ph.D., NIST Fellow
Dr. Antonio Possolo is a NIST Fellow and the Chief Statistician in the Statistical Engineering Division. Besides his current role at NIST, he has had over 20 years of experience as a statistician in industry (General Electric, Boeing) and as an assistant professor of statistics (Princeton University, and University of Washington). His areas of specialty include spatial statistics and modeling of spatio-temporal phenomena, environmental remote sensing, foundations of probability theory and of statistical inference, and measurement uncertainty. He is also fluent in Portuguese, Spanish, and French.

William Guthrie, M.S., Division Chief
William Guthrie is the Chief of the Statistical Engineering Division. For over 25 years, he has collaborated with NIST scientists and engineers to apply statistical methods to solve problems in semiconductor and microelectronic metrology, building materials research, and chemical metrology. His statistical interests include uncertainty assessment, Bayesian statistics, design of experiments, calibration, modern regression methods, and statistical computation.

U.S. Environmental Protection Agency sign in front of the Arial Rios headquarters building in Washington, DC


Kevin Teichman, Ph.D., Senior Science Advisor
Dr. Kevin Teichman is the Senior Science Advisor in the Office of Research and Development (ORD) at the U.S. EPA. In addition to providing advice on all aspects of ORD’s research programs, he coordinates ORD’s research efforts with other Federal agencies and organizations. Most recently, he has been working to coordinate interagency research devoted to hydraulic fracturing, net zero environmental impact buildings, and applications and sensors for air pollutants. Prior to assuming his current position, he served as the ORD Deputy Assistant Administrator for Science, where he led the planning of ORD’s research program and supervised the office’s National Program Directors. The ORD research program covers all aspects of environmental research, including research devoted to air, climate, and energy; safe and sustainable water resources; chemical safety for sustainability; sustainable and healthy communities; human health risk assessment; and homeland security.

Ed Walsh, B.S.B.A., Senior Policy Advisor
Ed Walsh is the Senior Policy Advisor and Agency Liaison to Congressional Appropriations Committees, Office of the Chief Financial Officer, EPA. He has served as executive branch congressional affairs liaison through several different Presidential Administrations, demonstrated the ability to bring together recognized environmental experts with policymakers to develop solutions to problems, is a results-driven leader with approximately 20 years of demonstrated experience managing and coordinating people, process, and technology, and has proven capabilities leading and managing teams dedicated to the production and development of the Environmental Protection Agency’s Budget.

Babasaheb (Bob) R. Sonawane, Ph.D. (retired from EPA in 2016)
Dr. Sonawane has over 35 plus years research and management experience in toxicology and pharmacology and  cancer/ non-cancer health risk assessment of environmental pollutants.  He is a very well recognized expert in the fields of Toxicology and Risk Assessment of xenobiotics. He is an author and/or co-author of over 100 publications and several book chapters in the fields of toxicology and pharmacology, children's environmental health and risk assessment of xenobiotics.  Dr. Sonawane worked as a Toxicologist with the U.S. Food and Drug Administration (1983-1985),  He served as a Biologist (1985-1990), Branch Chief of Reproductive and Developmental Toxicology (1991-1995) and Group Chief of Effects Identification and Characterization (1995- 2015) of National Center for Environmental Assessment (NCEA), Office of Research and Development of EPA.  He served on details as the Group Chief to Quantitative Risk Methods Group (2015), Acting Deputy Director (1989), and Acting Director (1990) of NCEA Cincinnati and Washington Divisions. For his outstanding service, Dr. Sonawane has received numerous awards, including the most "Distinguished Career Service Award" and the "Distinguished Service Citation" by the  EPA Administrator in 2016.


The National Institute of Standards and Technology (NIST)
The National Institute of Standards and Technology (NIST) is the Nation’s ultimate scientific authority in validating and upholding the state-of- the-art science of measurements – metrology. From the air and water quality, smart electric power grids to advanced nanomaterials, innumerable products and services rely in some way on technology, measurement, and standards provided by the National Institute of Standards and Technology.

The U.S. Environmental Protection Agency (EPA)
The Environmental Protection Agency (EPA) is the primary agency of the United States federal government whose mission is to protect human and environmental health. The EPA is responsible for conducting environmental assessment, research and education to create and enforce standards and laws that promote the health of individuals and the environment.

Agilent Technologies
Agilent Technologies (Agilent) is an American public research, development and manufacturing company. Agilent is a leader in life sciences, diagnostics and applied chemical markets. Focusing on six markets, food, environmental and forensics, pharmaceutical, diagnostics, chemical and energy, and research, the company provides analytical instruments, software, services and consumables for the entire laboratory value chain.