Skip to main content
U.S. flag

An official website of the United States government


USGS Chesapeake Bay studies are carried out by integrated teams of scientists located in Science Centers across the watershed. The scientists working on Chesapeake Bay projects are listed in the Employee Directory at the bottom of this page. Information on each Science Center is provided under Locations. Leaders of the integrated science topics can be found by clicking the green button below.


Social Media


Ken Hyer, Ph.D.

Chesapeake Bay Associate Coordinator

Employee Directory

Job Title Name Email Phone
Geologist Kate Ackerman 508-457-2331
Supervisory Research Chemist David Alvarez, PhD 573-441-2970
Oceanographer Alfredo Aretxabaleta , PhD 508-457-2204
Hydrologist/Water Quality Specialist Scott Ator 443-498-5564
Research Geologist Larry B Barber, II 303-541-3039
Research Wildlife Biologist Alicia Berlin, Ph.D. 301-497-5730
Center Director Christopher Bernhardt, Ph.D. 703-648-6071
Hydrologist Joel Blomquist 443-498-5560
Emeritus Scientist John Karl Bohlke 703-648-6325
Deputy Director, Integrated Modeling and Prediction Division John Brakebill 443-498-5557
Research Hydrologist Martin A. Briggs 860-487-7402
Ext: 19
Hydrologic Technician David Brower 443-498-5547
Coordinator, Delaware River Basin Next Generation Water Observing System (NGWOS) Douglas A Burns 518-285-5662
Emeritus Scientist Donald Cahoon, Ph.D. 301-497-5523
Research Ecologist Joel Carr, Ph.D. 443-695-0093
Supervisory Hydrologist Matthew J Cashman, Ph.D. 443-498-5511
Water Quality Specialist/Biologist Douglas B. Chambers 304-347-5130
Ext: 231
Hydrologist Jeff G. Chanat 804-261-2618
Research Geographer Peter Claggett 443-370-5724
Research Hydrologist John Clune, PhD 717-317-7226
Hydrologist James Colgin 717-730-6909
Research Oceanographer Salme Cook, PhD 508-457-2357
Senior Geologist Thomas Cronin, Ph.D. 703-648-6363
Oceanographer Zafer Defne, PhD 508-457-2254
Research Computer Scientist David I Donato 703-648-5772
Water Quality Specialist - Microbiologist Joe Duris 717-730-6930
Research Physical Scientist Meagan J. Eagle , PhD 508-457-2280
Hydrologist Rosemary Fanelli, Ph.D. 919-571-4036
Supervisory Research Ecologist Stephen Faulkner 304-724-4471
Groundwater Specialist Brandon Fleming 717-730-6970
Supervisory Hydrologist Guy M. Foster 518-285-5694
Research Oceanographer Neil Kamal Ganju, PhD 508-457-2252
Chemist Durga Ghosh 410-267-5750
Physical Scientist Stephanie Gordon 703-336-2793
Research Hydrologist Jennifer L Graham, Ph.D. 518-285-5706
Research Wildlife Biologist Evan Grant, Ph.D. 413-863-3823
Research Ecologist Glenn Guntenspergen, Ph.D. 218-788-2707
Physical Scientist Natalie C Hall
Research Physiologist Paula Henry, Ph.D. 301-497-5728
Associate Program Coordinator for Science (Acting) Emily A Himmelstoss 508-548-8700
Research Hydrologist Emeritus Robert M Hirsch 703-648-5888
Research Physical Scientist Wells Hively 301-504-9031
Scientist Emeritus Cliff Hupp 703-648-5207
Chesapeake Bay Associate Coordinator Ken Hyer, Ph.D. 804-382-7111
Research Biologist Luke R Iwanowicz, Ph.D. 304-724-4550
Chief, Watershed Studies Section John D. Jastram 804-261-2648
Research Geographer John W. Jones 703-994-3224
Physical Scientist Daniel K Jones 801-908-5010
Research Ecologist Natalie Karouna-Renier, Ph.D. 301-497-5724
Research Hydrologist Dana W Kolpin 319-358-3614
Ecologist Benjamin H Letcher 413-863-3803
Hydrologist Bruce Lindsey 717-730-6964
Hydrologist Emily H Majcher, PE 443-498-5520
Supervisory Hydrologic Technician Brenda Majedi 443-498-5527
Research Fish Biologist Pat Mazik, PhD 304-293-4943
Water Budget Branch Chief Kurt McCoy 804-261-2656
Physical Scientist Marina Metes 443-498-5576
Chief, Earth Systems Modeling Branch (acting) Matthew Miller 303-541-3048
Associate Director for Studies Douglas L. Moyer 804-261-2634
Science Advisor Peter Murdoch 518-285-5663
Supervisory Geographer Mark R Nardi 302-213-5057
Hydrologist Trevor P Needham, PhD 443-498-5584
Research Ecologist Gregory Noe 703-648-5826
Program Manager, Next Generation Water Observing Systems (acting) Brian Pellerin 703-648-6865
Chesapeake Bay Program Coordinator Scott Phillips 410 925-8098
Quality Management System Specialist Patrick Phillips 518-285-5667
Research Biologist Diann Prosser, Ph.D. 301-497-5914
Hydrologist/Groundwater Specialist Jeff P Raffensperger, Ph.D. 443-498-5542
Research Physiologist Barnett Rattner, Ph.D. 301-497-5671
Research Hydrologist Karen C. Rice, PhD 434-243-3429
Research Hydrologist Emeritus Nancy Rybicki 703-648-5728
Research Hydrologist Ward Sanford 703-648-5882
Hydrologist Noah Schmadel
Economist Gregory E Schwarz 703-648-5718
Physical Scientist Andrew Sekellick 443-498-5580
Hydrologist Gary Shenk
Research Oceanographer Christopher Sherwood, PhD 508-457-2269
Integrated Water Prediction Program Manager (acting) Katherine Skalak 703-648-5435
Research Hydrologist Kelly Smalling 609-331-4850
Research Ecologist Craig D Snyder 304-724-4468
Physical Scientist Alexander Soroka 302-734-2506
Ext: 224
Physical Scientist David R Strong 703-648-6193
Chesapeake Bay Monitoring Coordinator/Acting Deputy Director (Detail 2020) Peter Tango, Ph.D. 443-510-0486
Research Hydrologist Jim Tesoriero
Geographer Renee L Thompson 410-267-5749
Research Toxicologist Donald Tillitt, PhD 573-876-1886
Research Geologist Michael Toomey 703-648-6505
Research Fish Biologist Tyler Wagner, PhD 814-865-4511
Research Fish Biologist Heather Walsh 304-724-4445
Oceanographer John Warner, PhD 508-457-2237
Hydrologist James Webber 804-261-2621
Research Microbiologist, Emeritus James Winton, Ph.D. 206-526-6587
Assistant Director, Land Change Research, Hydrologic Transport and Response John C Wolf 410-267-5739
Research Biologist John A Young 304-724-4469
Research Geographer Sara L Zeigler, Ph.D 508-457-2290
Chief, New Cumberland Hydrologic Studies Tammy Zimmerman 717-730-6974