Team - Gradient

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Principals and Senior Team Members

Leonard D. Ancuta

Leonard D. Ancuta, Ph.D., G.I.T.
Senior Hydrogeologist/Geochemist

Lisa A. Bailey

Lisa A. Bailey, Ph.D.
Principal

Ifeoluwa A. Bamgbose

Ifeoluwa A. Bamgbose, M.S., DABT
Senior Environmental Scientist

Denali Boon

Denali Boon, Ph.D., M.P.H.
Senior Epidemiologist

Patricia M. Clyde

Patricia M. Clyde, Ph.D.
Senior Environmental Chemist

Christopher DesAutels

Christopher G. DesAutels, M.S.
Principal Scientist

Amy I. H. Hrdina

Amy I. H. Hrdina, Ph.D.
Senior Environmental Chemist

Tatiana D. Manidis

Tatiana D. Manidis, M.E.M.
Senior Environmental Scientist

Hilary J. Robinson

Hilary J. Robinson, M.S., P.E.
Senior Environmental Engineer

Ishita Shrivastava

Ishita Shrivastava, Ph.D.
Senior Environmental Engineer

Egidio F. Tentori

Egidio F. Tentori, Ph.D., E.I.T.
Senior Environmental Engineer

Chad E. Yaindl

Chad E. Yaindl, M.S.
Senior GIS Scientist

Qian Zhang

Qian Zhang, Ph.D.
Senior Environmental Scientist/Geologist

Barbara D. Beck

Barbara D. Beck, Ph.D., DABT, ATS, AAAS Fellow
Principal

Andrew B. Bittner

Andrew B. Bittner, M.Eng., P.E.
Principal

Chase Butler

Chase H. Butler, M.S.
Senior Environmental Chemist

Eric L. Butler

Eric L. Butler, Ph.D.
Principal

Rachel Y. Chang

Rachel Y. Chang, Ph.D., DABT
Senior Toxicologist

Jiayang Chien

Jiayang Chien, M.P.H.
Senior Environmental Scientist

Joel M. Cohen

Joel M. Cohen, Sc.D., DABT
Principal

David G. Dodge

David G. Dodge, M.S., DABT, CIH
Principal

Alice Li

Alice (Wenchao) Li, Ph.D., M.P.H.
Senior Epidemiologist

Rebecca C. Ticknor

Rebecca C. Ticknor, M.S.
Senior Toxicologist

Charlotte Marsh

Charlotte Marsh, M.S., CPPS
Senior Toxicologist

Isaac Mohar

Isaac Mohar, Ph.D., DABT
Principal Scientist

James W. Rice

James W. Rice, Ph.D.
Senior Environmental Scientist

Tian Tang

Tian Tang, Ph.D.
Senior Environmental Engineer

Lindsey Borton

Lindsey K. Borton, M.P.H.
Principal

Shuo Zhao

Shuo Zhao, M.S.
Senior Environmental Engineer

Caroline B. Tuit

Caroline B. Tuit, Ph.D.
Principal

Tim Verslycke

Tim Verslycke, Ph.D.
Principal

A. Dallas Wait

A. Dallas Wait, Ph.D.
Advising Principal

Robyn L. Prueitt

Robyn L. Prueitt, Ph.D., DABT
Principal

Michael K. Peterson

Michael K. Peterson, M.E.M., DABT
Principal

Andrew Yeh

Andrew Yeh, Ph.D., DABT
Senior Toxicologist

Mary L. Hixon

Mary L. Hixon, Ph.D.
Senior Toxicologist

Matthew P. Tymchak

Matthew P. Tymchak, M.S.
Senior Hydrologist

Meghna H. Swamy

Meghna H. Swamy, M.S.
Managing Environmental Engineer

Anna M. Engel

Anna M. Engel
Senior Research Associate

John M. Kondziolka

John M. Kondziolka, M.S.
Principal Scientist

Jessie M. Kneeland

Jessie M. Kneeland, Ph.D.
Principal Scientist

Matthew J. Mayo

Matthew J. Mayo, M.S., GISP, CPG, P.G.
Senior GIS/Environmental Scientist

Jeffrey T. Rominger

Jeffrey T. Rominger, Ph.D.
Principal

Naomi L. Slagowski

Naomi L. Slagowski, M.S.
Senior GIS/Environmental Engineer

Ari S. Lewis

Ari S. Lewis, M.S.
Principal

Marcia A. Olson

Marcia A. Olson, M.L.I.S.
Information Resources Director

Steven R. Boomhower

Steven R. Boomhower, Ph.D.
Senior Toxicologist

Teresa S. Bowers

Teresa S. Bowers, Ph.D.
Advising Principal

Samuel A. Flewelling

Samuel A. Flewelling, Ph.D.
Principal

Julie E. Goodman

Julie E. Goodman, Ph.D., DABT, FACE, ATS
Principal

Kurt Herman

Kurt Herman, M.Eng., P.G.
Principal

Cynthia J. Langlois

Cynthia J. Langlois, M.S.
Director of Technical Operations

David E. Langseth

David E. Langseth, Sc.D., P.E., D.WRE
Advising Principal

Tom A. Lewandowski

Tom A. Lewandowski, Ph.D., DABT, ERT, ATS
Principal

Christopher M. Long

Christopher M. Long, Sc.D., DABT
Principal

Rosemary Mattuck

Rosemary Mattuck, M.S.
Senior Environmental Engineer

Margaret C. Pollock

Margaret C. Pollock, M.S.
Managing Environmental Scientist

Kim Reynolds Reid

Kim Reynolds Reid
Principal Scientist

Lorenz R. Rhomberg

Lorenz R. Rhomberg, Ph.D., ATS
Advising Principal

Manu Sharma

Manu Sharma, M.S., P.E.
President

Jiaru Zhang

Jiaru Zhang, M.P.H., DABT
Principal Scientist