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The main office for the Maryland-Delaware-DIstrict of Columbia Water Science Center is located in Catonsville, MD with field offices in Dover, DE and Frostburg, MD. Our staff consists of scientists, technicians, and support personnel who are committed to providing accurate and timely information to MD, DE, DC, and the Nation.

Employee Directory

Job Title Name Email Phone Sort descending
Supervisory Hydrologic Technician Brian Banks bbanks@usgs.gov
Physical Scientist Betzaida Reyes breyes@usgs.gov
Supervisory Geographer Natalie C Hall, PhD nhall@usgs.gov
Hydrologic Field Assistant Leah E. Staub lstaub@usgs.gov 240-470-0870
Hydrologic Technician A.J. Greise ajgreise@usgs.gov 301-687-0919
Ext: 14
Hydrologic Technician James Broadwater jebroadw@usgs.gov 301-687-0919
Ext: 13
Hydrologic Technician Michael Clark maclark@usgs.gov 301-687-0919
Ext: 11
Hydrologic Technician Eric Boyd elboyd@usgs.gov 301-687-0919
Pathways Student Hydrologic Technician Logan Jeffries ljeffries@usgs.gov 301-687-0919
Supervisory Hydrologic Technician Matt Baker smbaker@usgs.gov 301-707-5491
Hydrologic Technician Michael Brownley msbrownl@usgs.gov 302-213-5055
Hydrologic Technician Christopher R Lewis crlewis@usgs.gov 302-213-5056
Supervisory Geographer Mark R Nardi mrnardi@usgs.gov 302-213-5057
Supervisory Hydrologic Technician Anthony Tallman atallman@usgs.gov 302-213-5061
Research Oceanographer Jenna Brown, PhD jennabrown@usgs.gov 302-213-5071
Physical Scientist Alexander Soroka asoroka@usgs.gov 302-734-2506
Ext: 224
Chemist Durga Ghosh dghosh@usgs.gov 410-267-5750
Hydrologic Technician Todd Lester tlester@usgs.gov 410-422-2489
Hydrologic Technician Jeremy Malen jmalen@usgs.gov 443-285-9059
Hydrologic Technician Elizabeth Marchand ehmarch@usgs.gov 443-498-5500
Hydrologic Technician John Tapscott jtapscott@usgs.gov 443-498-5500
Student of Hydrology Kelly McVicker kmcvicker@usgs.gov 443-498-5500
Hydrologic Field Assistant Nicole Bellmyer nbellmyer@usgs.gov 443-498-5500
Physical Scientist Breck M Sullivan bsullivan@usgs.gov 443-498-5500
Center Director Mary Kay Foley, P.E., PMP mkfoley@usgs.gov 443-498-5501
Supervisory Hydrologist Matthew G Pajerowski mgpajero@usgs.gov 443-498-5506
Physical Scientist Matthew J Cashman, Ph.D. mcashman@usgs.gov 443-498-5511
Administrative Officer (Acting) Joseph P Jenkins jjenkins@usgs.gov 443-498-5512
Hydrologist Emily H Majcher, PE emajcher@usgs.gov 443-498-5520
Hydrologic Technician Michael Geissel mcgeisse@usgs.gov 443-498-5522
Associate Director for Data Charles Walker, Ph.D. cwwalker@usgs.gov 443-498-5523
Supervisory Hydrologic Technician Brenda Majedi blfeit@usgs.gov 443-498-5527
Hydrologic Technician Fisseha Mengistu fmengistu@usgs.gov 443-498-5532
Supervisory IT Specialist Gwen Kvech gmhatten@usgs.gov 443-498-5533
Hydrologist/Groundwater Specialist Jeff P Raffensperger, Ph.D. jpraffen@usgs.gov 443-498-5542
Deputy Center Director Ethan Weikel, P.G. eweikel@usgs.gov 443-498-5543
Physical Scientist Lillian E Gorman Sanisaca lgormansanisaca@usgs.gov 443-498-5546
Hydrologic Technician David Brower dpbrower@usgs.gov 443-498-5547
Geographer Andrew E LaMotte alamotte@usgs.gov 443-498-5549
Geographer/GIS Specialist Michael E Wieczorek mewieczo@usgs.gov 443-498-5550
Deputy Director, Integrated Modeling and Prediction Division John Brakebill jwbrakeb@usgs.gov 443-498-5557
Hydrologist/Water Quality Specialist Scott Ator swator@usgs.gov 443-498-5564
Hydrologist John C. Hammond, PhD jhammond@usgs.gov 443-498-5568
Physical Scientist Marina Metes mmetes@usgs.gov 443-498-5576
Physical Scientist Andrew Sekellick ajsekell@usgs.gov 443-498-5580
Research Hydrologist Allen C Gellis, Ph.D. agellis@usgs.gov 443-498-5581
Hydrologist Trevor P Needham, PhD tneedham@usgs.gov 443-498-5584
Web Developer/Digital Content Manager Lonnie R. Lanham lrlanham@usgs.gov 443-498-5599
Research Hydrologist Michelle Lorah mmlorah@usgs.gov 443-498-5601
Hydrologic Technician Brett Mcfarland bmcfarland@usgs.gov 443-498-5664
Hydrologic Technician Ashley M Ryan aryan@usgs.gov 443-498-5694
Data Scientist Kyle Hurley khurley@usgs.gov 443-498-5695
Hydrologist Jennifer Marie Olszewski jolszewski@usgs.gov 443-498-5695
Chesapeake Bay Monitoring Coordinator/Acting Deputy Director (Detail 2020) Peter Tango, Ph.D. pjtango@usgs.gov 443-510-0486
Hydrologic Technician Sarah Queen sjqueen@usgs.gov 443-743-0283
Hydrologic Technician Jeffrey E Klein jklein@usgs.gov 443-833-5775
Hydrologist Cheryl Dieter cadieter@usgs.gov 443-883-0761
Hydrologist Rosemary M Fanelli, Ph.D. rfanelli@usgs.gov 919-571-4036