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NOROCK researchers are based in Bozeman, Montana with field stations at West Glacier and Missoula, Montana and a duty station in Knoxville, Tennessee. Our people are dedicated to providing reliable, unbiased science about America’s public lands that is useful to land and wildlife managers, decision-makers, and the public.        

Employee Directory

Job Title Name Email Phone
Research Fish Biologist Robert Al-Chokhachy, Ph.D. ral-chokhachy@usgs.gov 409-994-7842
Research Ecologist Erik Beever, Ph.D. ebeever@usgs.gov 406-994-7670
Physical Scientist Adam Clark amclark@usgs.gov 406-888-7993
Scientist Emeritus Joseph Clark, Ph.D. jclark1@usgs.gov 865-974-4790
Biologist Gavin Cotterill, PhD gcotterill@usgs.gov
Research Wildlife Biologist Paul Cross, Ph.D. pcross@usgs.gov 406-994-6908
Biological Science Technician Chad Dickinson chad_dickinson@usgs.gov 406-994-5054
Research Ecologist Robb Diehl, Ph.D. rhdiehl@usgs.gov 406-994-7481
Research Physical Scientist Caitlyn Florentine, Ph.D. cflorentine@usgs.gov
Fish Biologist Hayley Glassic, Ph.D. hglassic@usgs.gov
Biologist Matthew Gould, Ph.D. mgould@usgs.gov 406-994-5043
Research Ecologist Tabitha Graves, Ph.D. tgraves@usgs.gov 406-589-6645
Scientist Emeritus Mark Haroldson mharoldson@usgs.gov 406-994-5042
Research Zoologist Blake Hossack, Ph.D. blake_hossack@usgs.gov 406-243-4495
Biologist Patrick Hutchins phutchins@usgs.gov
Research Statistician Kathi Irvine, Ph.D. kirvine@usgs.gov 406-994-7492
Biologist Will Janousek, Ph.D. wjanousek@usgs.gov 406-888-7996
Research Ecologist Aaron Johnston, Ph.D. ajohnston@usgs.gov 406-994-7158
Biologist Bryn Karabensh bkarabensh@usgs.gov 406-994-5041
Biologist Blake Lowrey, Ph.d. blowrey@usgs.gov
Ecologist Justin T Martin justinmartin@usgs.gov 406-994-5304
IT Specialist Kelvin Miller kdmiller@usgs.gov
Biologist Wynne Moss, Ph.D. wmoss@usgs.gov
Research Ecologist Clint Muhlfeld, Ph.D. cmuhlfeld@usgs.gov 406-600-9686
Administrative Officer Judy O'Dwyer jodwyer@usgs.gov 406-994-7544
Research Ecologist Greg Pederson, Ph.D. gpederson@usgs.gov 406-994-7390
Research Physical Scientist Erich Peitzsch, Ph.D epeitzsch@usgs.gov 406-599-9970
Physical Scientist Todd Preston tmpreston@usgs.gov 406-994-5034
Research Zoologist Adam Sepulveda, Ph.D. asepulveda@usgs.gov 406 404 9155
Mendenhall Postdoctoral Research Fellow, Microbiologist Devin N Slobodian, Ph.D. dslobodian@usgs.gov
Biologist Brian Tornabene, Ph.D. btornabene@usgs.gov
Scientist Emeritus Frank T van Manen, Ph.D. fvanmanen@usgs.gov 406-994-5043
Biological Science Technician Craig Whitman cwhitman@usgs.gov 406-994-6135
Science Communications Biologist Todd Wojtowicz, Ph.D. twojtowicz@usgs.gov
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