Skip to main content
U.S. flag

An official website of the United States government

Connect

We would like to hear from you! Please reach out to us. 

Sign up for the GEMMA Dispatch newsletter

Locations

Social Media

Contacts

Sarah J. Ryker, Ph.D.

Associate Director
Geology, Energy, and Minerals Mission Area

Teresa Kirschling, Ph.D.

Deputy Associate Director
Geology, Energy, and Minerals Mission Area
Phone
303-236-3177

Colin F Williams, PhD.

Program Coordinator
Mineral Resources Program
Phone
650-439-2881

Alicia Lindauer

Program Coordinator
Energy Resources Program
Phone
303-236-7775

Kendra L Russell

Chief of Staff
Geology, Energy, and Minerals Mission Area
Phone
703-648-5323

Michele Wolf

Geology, Energy and Minerals Mission Area Program Coordinator for NGGDPP (acting)
Geology, Energy, and Minerals Mission Area
Phone
720-326-0284

Christopher S Swezey, Ph.D.

Program Coordinator
National Cooperative Geologic Mapping Program
Phone
703-648-6444

Employee Directory

Job Title
Name
Email
Phone
Physical Scientist David Ahumada dahumada@usgs.gov
Mineral Commodity Specialist Amanda Brioche abrioche@usgs.gov 703-648-7747
Deputy Center Director Ellie D Brown, Ph.D. ebrown@usgs.gov 703-648-5751
Management Analyst Jeanne Bruins jbruins@usgs.gov 571-299-9451
Senior Management Officer Helena (Lena) Buchanan hbuchanan@usgs.gov 703-648-6613
Country Specialist Jaewon Chung jchung@usgs.gov 703-648-4793
Physical Scientist Daniel J Colwell dcolwell@usgs.gov 571-512-2209
Scientist Emeritus Warren C Day, Ph.D. wday@usgs.gov 303-384-2682
Country Specialist Keita DeCarlo kdecarlo@usgs.gov 703-648-7716
Quality Assurance Specialist Nian Du, PhD ndu@usgs.gov
Physical Scientist, Quality Assurance Specialist Alisha Ellis aellis@usgs.gov 703-648-6615
Country Specialist Yolanda Fong-Sam yfong-sam@usgs.gov 703-648-7756
Associate Program Coordinator / Research Engineer Tanya J Gallegos, Ph.D. tgallegos@usgs.gov 703-648-6181
Geologist Kristina Gardner kgardner@usgs.gov 703-648-6006
Program Analyst Amanda Gelsomin agelsomin@usgs.gov 872-227-1034
Geologist Alena Giesche, Ph.D. agiesche@usgs.gov 907-786-7154
Country Specialist Joanna Asha Goclawska jgoclawska@usgs.gov 703-648-7973
Country Specialist Alexandru Hostiuc ahostiuc@usgs.gov 703-648-7708
Core Research Center Curator Terry Huber thuber@usgs.gov 303-202-4851
Country Specialist Jesse J. Inestroza jinestroza@usgs.gov 703-648-7779
Earth MRI Coordinator Jamey Jones jvjones@usgs.gov 907-786-7442
Deputy Associate Director Teresa Kirschling, Ph.D. tkirschling@usgs.gov 303-236-3177
Associate Program Coordinator Mojisola A KunleDare, PhD, PG mkunledare@usgs.gov 703-648-6609
Technical Curator, USGS managed, U.S. National Science Foundation Ice Core Facility Curt LaBombard clabombard@usgs.gov
Associate Program Coordinator Mari Titcombe Lee, PhD melee@usgs.gov 303-236-4722
Program Coordinator Alicia Lindauer alindauer@usgs.gov 303-236-7775
Physical Scientist Brianna R Lopez Hetland blopezhetland@usgs.gov 571-342-7026
Country Specialist Kristian Macias kmacias@usgs.gov 703-648-4902
Physical Scientist Eliza Malakoff emalakoff@usgs.gov
Administrative Program Manager Michael Marketti mmarketti@usgs.gov 703-328-3102
Physical Scientist Ji Won Moon jmoon@usgs.gov 703-648-7791
Associate Program Coordinator - Science Suzanne W Nicholson, Ph.D. swnich@usgs.gov 703-648-6344
Chief, Data Collection and Coordination Shonta E Osborne sosborne@usgs.gov 703-648-7971
Minerals Intelligence Analyst Abraham J. Padilla, PhD apadilla@usgs.gov 703-648-4965
Country Specialist Alberto A. Perez aperez@usgs.gov 703-648-7749
Country Specialist Meralis Plaza-Toledo mplaza-toledo@usgs.gov 703-648-7759
Mineral Commodity Specialist Désirée E. Polyak dpolyak@usgs.gov 703-648-4909
Country Specialist Edgardo J. Pujols Vazquez, Ph.D. epujolsvazquez@usgs.gov 703-648-4919
Program Analyst/EMMA Records Officer Donna M. Read dread@usgs.gov 703 648 6471
Associate Program Coordinator Timothy Reilly tjreilly@usgs.gov
Country Specialist Karine Renaud krenaud@usgs.gov 703-648-7748
Earth MRI Associate Science Coordinator Charlotte Riggs, PhD criggs@usgs.gov
STATEMAP Program Officer Kate Ritzel kritzel@usgs.gov 571-512-1641
Chief of Staff Kendra L Russell klrussell@usgs.gov 703-648-5323
Associate Director Sarah J. Ryker, Ph.D. sryker@usgs.gov
Country Specialist Elena Safirova, Ph.D. esafirova@usgs.gov 703-648-7731
Country Specialist Iman Salehi Hikouei, Ph.D. isalehihikouei@usgs.gov 703-648-7744
Mineral Commodity Specialist Kristine Noel Sheaffer ksheaffer@usgs.gov 703-648-4954
Physical Scientist-Outreach Suzanna Soileau, MEd ssoileau@usgs.gov
Senior Program Scientist for the National Geologic Map Database David Soller, Ph.D. drsoller@usgs.gov 703-648-6907
Country Specialist Yadira Soto-Viruet ysoto-viruet@usgs.gov 703-648-4957
Mineral Commodity Specialist Andrew A Stewart astewart@usgs.gov 703-648-7723
Program Coordinator Christopher S Swezey, Ph.D. cswezey@usgs.gov 703-648-6444
Mineral Commodity Specialist Amy Tolcin atolcin@usgs.gov 703-648-4940
Country Specialist Kathleen R. Trafton, Ph.D. ktrafton@usgs.gov
Country Specialist Loyd Trimmer ltrimmer@usgs.gov 703-648-4983
Science Communicator Elda Varela Minder evarelaminder@usgs.gov 202-550-8914
Geologist - NGMDB Strategic Development Robert Wardwell rwardwell@usgs.gov
Budget Analyst Markeshia D Watson mwatson@usgs.gov 225-615-6305
Research Geologist Kathryn Watts kwatts@usgs.gov 509-368-3108
Staff Scientist Lief Wiechman lwiechman@usgs.gov 970-237-2764
Program Coordinator Colin F Williams, PhD. colin@usgs.gov 650-439-2881
External Program Manager Tamara Wilson tswilson@usgs.gov 650-429-2347
Geology, Energy and Minerals Mission Area Program Coordinator for NGGDPP (acting) Michele Wolf mwolf@usgs.gov 720-326-0284
Supervisory Country Specialist Sean Xun sxun@usgs.gov 703-648-7746
Was this page helpful?