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Tina Roberts-Ashby, Ph.D.

Science Center Director
Geology, Energy & Minerals Science Center
Phone
703-648-6543

Carla A. Brezinski

Associate Science Center Director
Geology, Energy & Minerals Science Center
Phone
703-648-6317

Evan A. Bargnesi

Associate Science Center Director
Geology, Energy & Minerals Science Center
Phone
703-648-6407

Employee Directory

Job Title
Name
Email
Phone
Physical Scientist Joao S. Gallotti sgallotti@usgs.gov
Mathematical Statistician Ashton Wiens, Ph.D. awiens@usgs.gov
GIS and Data Technician Louisa A. Kramer lkramer@usgs.gov
Research Chemist Andrew L. Masterson, Ph.D. amasterson@usgs.gov
Senior Budget Analyst Teresa L. Sims tsims@usgs.gov (479) 747-0373
Biologist Bridgette F. Polite bpolite@usgs.gov (703) 648-5479
Scientist Emeritus Ernie R Slucher eslucher@usgs.gov 614-430-7746
Geologist Michael H. Trippi mtrippi@usgs.gov 703-648-4597
Petroleum Geochemist Palma J. Botterell pbotterell@usgs.gov 703-648-5416
Research Microbiologist Denise M. Akob, Ph.D. dakob@usgs.gov 703-648-5819
Physical Scientist Jacqueline P. Benefield-Green jbenefield@usgs.gov 703-648-5827
Research Hydrologist Michelle R. Plampin, Ph.D. mplampin@usgs.gov 703-648-5841
Physical Science Technician Glenn D. Jolly gdjolly@usgs.gov 703-648-5866
Research Hydrologist Isabelle M. Cozzarelli, Ph.D. icozzare@usgs.gov 703-648-5899
Scientist Emeritus Gilpin (Rob) Robinson, Jr., Ph.D. grobinso@usgs.gov 703-648-6113
Scientist Emeritus Emil D. Attanasi, Ph.D. attanasi@usgs.gov 703-648-6129
IT Specialist (Data Management) Edward G. Boyce egboyce@usgs.gov 703-648-6149
Research Geologist Bernard E. Hubbard bhubbard@usgs.gov 703-648-6155
Scientist Emeritus Harvey E. Belkin hbelkin@usgs.gov 703-648-6162
Geologist Jane M. Hammarstrom jhammars@usgs.gov 703-648-6165
Research Geologist Nora Foley nfoley@usgs.gov 703-648-6179
Research Geologist Nadine M. Piatak-Hackley npiatak@usgs.gov 703-648-6254
Scientist Emeritus Rama Kotra rkotra@usgs.gov 703-648-6271
Scientist Emeritus William H. Orem, Ph.D. borem@usgs.gov 703-648-6273
Scientist Emeritus Anne L. Bates abates@usgs.gov 703-648-6279
Research Geologist Robert R. Seal rseal@usgs.gov 703-648-6290
Associate Science Center Director Carla A. Brezinski cbrezinski@usgs.gov 703-648-6317
Research Geologist John Jackson jjackson@usgs.gov 703-648-6321
Acting Center Director Dan O. Hayba dhayba@usgs.gov 703-648-6327
Research Scientist Clinton T. Scott, Ph.D. clintonscott@usgs.gov 703-648-6329
Geologist Carlin J. Green cjgreen@usgs.gov 703-648-6331
Research Geologist Federico Solano fsolanoc@usgs.gov 703-648-6335
Scientist Emeritus John F. Slack jfslack@usgs.gov 703-648-6337
Mendenhall Postdoctoral Research Geologist Bryan A. Killingsworth, Ph.D. bkillingsworth@usgs.gov 703-648-6341
Scientist Emeritus William F. Cannon wcannon@usgs.gov 703-648-6345
Research Geologist Robert Ayuso rayuso@usgs.gov 703-648-6347
Geologist Damon P. Bickerstaff dbickers@usgs.gov 703-648-6351
Research Geologist Joshua M. Rosera, Ph.D. jrosera@usgs.gov 703-648-6352
Research Chemist Sarah Jane White, Ph.D. sjowhite@usgs.gov 703-648-6361
Associate Science Center Director Evan A. Bargnesi ebargnesi@usgs.gov 703-648-6407
Program Analyst Luis A. Henry Vazquez lhenryvazquez@usgs.gov 703-648-6408
Information Technology Specialist (Internet) Eric A. Morrissey emorriss@usgs.gov 703-648-6409
Research Chemist Matthew S. Varonka, Ph.D. mvaronka@usgs.gov 703-648-6412
Research Mathematical Statistician Ricardo A. Olea, Ph.D. rolea@usgs.gov 703-648-6414
Research Geologist Denise M. Levitan, Ph.D. dlevitan@usgs.gov 703-648-6414
Scientist Emeritus C. Blaine Cecil bcecil@usgs.gov 703-648-6415
Data Scientist Jeremy K. Ray jray@usgs.gov 703-648-6415
Scientist Emeritus Frank T. Dulong fdulong@usgs.gov 703-648-6416
Geologist William A. Rouse wrouse@usgs.gov 703-648-6423
IT Specialist (Data Management) Andy J. Park apark@usgs.gov 703-648-6424
Chemist, Laboratory Manager Jessica M. Chenault jchenault@usgs.gov 703-648-6425
Supervisory Cartographer Christopher P. Garrity cgarrity@usgs.gov 703-648-6426
Research Geologist Margaret M. Sanders, Ph.D. msanders@usgs.gov 703-648-6427
Data Scientist John W. Fisher jwfisher@usgs.gov 703-648-6429
Scientist Emeritus Leslie F. (Jingle) Ruppert lruppert@usgs.gov 703-648-6431
Physical Scientist Rebecca A. Smith rsmith@usgs.gov 703-648-6433
Research Geologist Sean T. Brennan sbrennan@usgs.gov 703-648-6434
Cartographer Steven M. Cahan scahan@usgs.gov 703-648-6435
Administrative Operations Assistant Brett R. Warner bwarner@usgs.gov 703-648-6436
Physical Scientist Celeste D. Lohr clohr@usgs.gov 703-648-6438
Scientist Emeritus Catherine B. Enomoto cenomoto@usgs.gov 703-648-6439
Physical Scientist Christina A. DeVera cdevera@usgs.gov 703-648-6441
Operations Research Analyst Philip A. Freeman pfreeman@usgs.gov 703-648-6447
Physical Scientist Jennifer L. Nedzweckas jnedzweckas@usgs.gov 703-648-6449
Geologist Joseph A. East jeast@usgs.gov 703-648-6450
Physical Science Technician Javin J. Hatcherian jhatcherian@usgs.gov 703-648-6455
Research Petroleum Engineer Cevat O. Karacan, Ph.D. ckaracan@usgs.gov 703-648-6456
Research Geologist Matthew D. Merrill mmerrill@usgs.gov 703-648-6457
Research Geologist Paul C. Hackley, Ph.D. phackley@usgs.gov 703-648-6458
Research Chemist Sarah M. Hayes, Ph.D. shayes@usgs.gov 703-648-6461
Chemist Amanda S. Herzberg aherzberg@usgs.gov 703-648-6462
Research Chemist Elisha “Eli” K. Moore, Ph.D. ekmoore@usgs.gov 703-648-6465
Senior Research Geologist David W. Houseknecht dhouse@usgs.gov 703-648-6466
Research Geologist Matthew M. Jones, Ph.D. mmjones@usgs.gov 703-648-6468
Supervisory Research Geologist Peter D. Warwick, Ph.D. pwarwick@usgs.gov 703-648-6469
Administrative Operations Assistant Sharon B. Bailey-Branch sbranch@usgs.gov 703-648-6474
Information Technology Supervisor Robert Matthias rmatthias@usgs.gov 703-648-6477
Research Geologist Christopher D. Connors cconnors@usgs.gov 703-648-6478
Physical Scientist Martha (Rebecca) Stokes, Ph.D. mstokes@usgs.gov 703-648-6479
Physical Scientist Brett J. Valentine bvalentine@usgs.gov 703-648-6480
Research Chemist Aaron M. Jubb, Ph.D. ajubb@usgs.gov 703-648-6481
Geologist Connie L. Dicken cdicken@usgs.gov 703-648-6482
Research Chemist Elizabeth J. Tomaszewski, Ph.D. etomaszewski@usgs.gov 703-648-6483
Economist Steven T. Anderson sanderson@usgs.gov 703-648-6486
Research Geologist John W. Counts, Ph.D. jcounts@usgs.gov 703-648-6491
Biologist Alexis M. Painter apainter@usgs.gov 703-648-6496
Mendenhall Research Geologist Ross A. Salerno, Ph.D. rsalerno@usgs.gov 703-648-6499
Physical Science Technician Rani Indela vindela@usgs.gov 703-648-6504
Geologist Darryl A. Hoppe dhoppe@usgs.gov 703-648-6506
Research Geologist Madalyn S. Blondes, Ph.D. mblondes@usgs.gov 703-648-6509
Research Geologist William H. Craddock, Ph.D. wcraddock@usgs.gov 703-648-6515
Research Geologist Marc L. Buursink, Ph.D. buursink@usgs.gov 703-648-6517
Geologist Peter N. Schweitzer, Ph.D. pschweitzer@usgs.gov 703-648-6533
Science Center Director Tina Roberts-Ashby, Ph.D. troberts-ashby@usgs.gov 703-648-6543
Scientist Emeritus James (Jim) McNeal jmcneal@usgs.gov 703-648-6650
Research Engineer Bonnie McDevitt bmcdevitt@usgs.gov 703-648-6678
Scientist Emeritus Elisabeth L. Rowan erowan@usgs.gov 703-648-6745
Research Geologist Colin Doolan cdoolan@usgs.gov 703-648-6761
Physical Scientist Graham W. Lederer, Ph.D. glederer@usgs.gov 703-648-7719
Research Geologist Laurel G. Woodruff woodruff@usgs.gov 763-783-3291