about GSI services links contact staff

At GSI Water Solutions, most of our staff members are technical professionals – hydrogeologists, geologists, hydrologists, water resources specialists, water rights specialists, environmental scientists, and regulatory experts with years of experience in their fields.

Our support staff provides geographic information system (GIS), graphics, technical editing, technical writing, document production, and project administration.

GSI’s entire staff is dedicated to providing creative, cost-effective, and appropriate solutions for our clients.


Adam Sussman
Principal Water Resources Consultant
541.753.0745, ext. 201
Adrienne Lindsey
Accounting Assistant
503.239.8799, ext. 138
Andrew Davidson
Staff Environmental Engineer
503.239.8799, ext. 122
Aristides Petrides
Senior Staff Hydrologist
541.753.0745, ext. 140
Bruce Brody-Heine
Principal Hydrogeologist
541.678.5117, ext. 1
Chris Augustine
Project Hydrogeologist
503.239.8799, ext. 119
Danielle MacBain
Water Resources Analyst
541.678.5117, ext. 2
Dave Livesay
GSI President
Principal Hydrogeologist

541.753.0745, ext. 202
  DeEtta Fosbury
Staff Hydrogeologist
503.239.8799, ext. 137
Dennis Nelson
Senior Hydrogeologist
503.239.8799, ext. 133
Doug McChesney
Senior Water Resources Consultant
503.239.8799
  Emily Mackey
Accounting Manager
503.239.8799, ext. 111
Eric Collins
Senior Hydrogeologist
503.239.8799, ext. 105
Eric Roth
Senior Hydrogeologist
503.239.8799, ext. 120
  Erin Carroll
Project Hydrogeologist
503-239-8799, ext. 135
Heidi Blischke
Principal Hydrogeologist
503.239.8799, ext. 114
Janet Luty
Administrative Assistant
503.239.8799, ext. 101
  Jason Melady
Project Hydrogeologist
503.239.8799, ext. 104
Jeff Barry
Principal Hydrogeologist
503.239.8799, ext. 102
Jesse Manley
Senior Staff GIS Specialist
541.678.5117, ext. 3
  Jill Carroll
Publications Manager
503.239.8799, ext. 109
John Porcello
Senior Groundwater Hydrologist
503.239.8799, ext. 115
Jon Travis
Senior Staff Geologist
509.735.7135, ext. 203
  Julia Fowler
Senior Engineer
503.239.8799, ext. 112
Julie Wilson
Senior Environmental Scientist
503.239.8799, ext. 118
Karen Demsey
Geologist
503.239.8799, ext. 126
  Ken Trotman
Senior Hydrogeologist
503.239.8799, ext. 116
Kevin Boggs
Senior Hydrogeologist
208-246-8840
Kevin Lindsey
Principal Hydrogeologist
509.735.7135, ext. 201
  Kevin Parrett
Senior Environmental Scientist
503.239.8799, ext. 121
Kim Grigsby
Water Resources Consultant
541.753.0745, ext. 203
Larry Eaton
Principal Hydrogeologist
503.239.8799, ext. 103
  Letanya Bjonskaas
Human Resources Assistant
503.239.8799, ext. 130
Libby Smith
Senior Staff Environmental Scientist
503.239.8799, ext. 117
Liesl Deck
Financial Controller
503.239.8799, ext. 127
Matt Kohlbecker
Project Hydrogeologist
503.239.8799, ext. 107
Mohammad Hashash
IT Manager
503.239.8799, ext. 123
Molly Reid
Water Resources Analyst
509.735.7135, ext. 202
  Nicole Landsberg
Staff GIS Specialist
503.239.8799 ext. 128
Peter Pellegrin
Field Technical Specialist
503.239.8799 ext. 129
Phil Brown
Principal Hydrogeologist
503.239.8799, ext. 139
  Randy Pratt
Senior Civil-Environmental Engineer
503.239.8799, ext. 125
Renee Fowler
Staff Environmental Scientist
503.239.8799, ext. 124
Rod Struck
Senior Hydrogeologist
503.239.8799, ext. 113
  Steve Reidel
Senior Hydrogeologist
509.735.7135
Suzanne Moellendorf
Water Resources Consultant
541.753.0745 ext. 204
Ted Ressler
Project Hydrogeologist
503.239.8799, ext. 106
Terry Tolan
Senior Hydrogeologist
509.735.7135, ext. 205
Travis Hammond
Staff Hydrogeologist
509.735.7135, ext. 206
Vicki Cartwright
Human Resources Manager
503.239.8799, ext. 132
  Walter Burt
Principal Hydrogeologist
503.239.8799, ext. 108