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
Senior Water Resources Consultant
541.753.0745, ext. 201
  Karen Demsey
Geologist
503.239.8799
  Adrienne Lindsey
Accounting Assistant
503.239.8799, ext. 130
  Ken Trotman
Senior Hydrogeologist
503.239.8799, ext. 116
  Andrew Davidson
Staff Environmental Engineer
503.239.8799, ext. 122
  Kevin Lindsey
Senior Hydrogeologist
509.735.7135, ext. 201
  Bruce Brody-Heine
Senior Hydrogeologist
541.678.5117, ext. 2
  Kevin Parrett
Senior Environmental Scientist
503.239.8799, ext. 121
  Chris Augustine
Project Hydrogeologist
503.239.8799, ext. 119
  Kim Grigsby
Water Resources Consultant
541.753.0745, ext. 203
  Corey Treacy
Assistant Program Specialist
503.239.8799
  Larry Eaton
Senior Hydrogeologist
503.239.8799, ext. 103
  Danielle MacBain
Water Resources Analyst
541.678.5117, ext. 3
  Letanya Bjonskaas
Accounting Assistant
503.239.8799, ext. 127
  Dave Livesay
GSI President
Senior Hydrogeologist

541.753.0745, ext. 202
  Matt Kohlbecker
Project Hydrogeologist
503.239.8799, ext. 107
  Dennis Nelson
Senior Hydrogeologist
541.744.8121
  Mohammad Hashash
IT Manager
503.239.8799, ext. 123
  Doug McChesney
Senior Water Resources Consultant
503.239.8799
  Molly Reid
Water Resources Analyst
509.735.7135, ext. 202
  Emily Mackey
Accounting Manager
503.239.8799, ext. 111
  Nicole Landsberg
Staff GIS Specialist
503.239.8799 ext. 128
Eric Collins
Senior Hydrogeologist
503.239.8799, ext. 105
Peter Pellegrin
Field Technical Specialist
503.239.8799 ext. 129
  Erin Carroll
Senior Staff Hydrogeologist
503-239-8799, ext. 125
  Rachael Peavler
Staff Hydrogeologist
503.239.8799, ext. 124
  Heidi Blischke
Senior Hydrogeologist
503.239.8799, ext. 114
  Randy Pratt
Senior Civil-Environmental Engineer
541.740.7387
  Janet Luty
Administrative Assistant
503.239.8799, ext. 101
  Renee Fowler
Staff Environmental Scientist
503.239.8799, ext. 133
Jason Melady
Project Hydrogeologist
503.239.8799, ext. 104
Steve Reidel
Senior Hydrogeologist
509.735.7135
  Jeff Barry
Senior Hydrogeologist
503.239.8799, ext. 102
  Suzanne Moellendorf
Water Resources Consultant
541.753.0745 ext. 204
  Jesse Manley
Senior Staff GIS Specialist
541.678.5117, ext. 4
  Ted Ressler
Project Hydrogeologist
503.239.8799, ext. 106
  Jill Carroll
Publications Manager
503.239.8799, ext. 109
  Terry Tolan
Senior Hydrogeologist
509.735.7135, ext. 205
  Jinsam Kim
Senior Staff Hydrogeologist
503.239.8799, ext. 120
  Travis Hammond
Staff Hydrogeologist
509.735.7135, ext. 206
John Porcello
Senior Groundwater Hydrologist
503.239.8799, ext. 115
Vicki Cartwright
Human Resources Manager
503.239.8799, ext. 118
  Jon Travis
Senior Staff Geologist
509.735.7135, ext. 203
  Walter Burt
Senior Hydrogeologist
503.239.8799, ext. 108
  Julia Fowler
Senior Engineer
503.239.8799, ext. 112