Senior Hydrogeologist

Environmental Boulder, Colorado Honolulu, Hawaii United States



Responsible for planning, performing, and reporting on hydrogeologic investigations and remediation projects. 


Duties include but are not limited to:

  • Numerical groundwater modeling
  • Technical oversight and statistical analysis of hydrogeologic data, contaminant fate and transport analyses, groundwater modeling, and remediation alternatives.
  • Prepare plans for hydrogeologic characterization of groundwater and/or surface water
  • Present methodologies, data, conclusions, and recommendations internally and to clients and regulators
  • Communicates results to management, field teams, the client, and others.
  • Writes/assists with proposals, work plans, interim and final reports, as well as research.
  • Prepares and gives presentations at conferences and acts as liaison to clients.
  • Provides accurate project information to stakeholders, clients, and internally to team leaders and managers.
  • Mentors junior level staff on methodologies and apply in-house procedures to field and office tasks.
  • Achieve excellent performance ratings from clients for hydrogeologic tasks performed during the course of GSI projects.
  • Stay abreast of new and emerging technologies in support of hydrogeologic field data collection activities.
  • Performs advanced analyses to support assessment of conceptual site models.
  • Provide GPS data collection training to field teams.
  • May occasionally participate in field data collection activities.


  • Bachelors degree Geology or Hydrogeology
  • Experience working with government GIS clients
  • Ability to work outside normal work hours at short notice as dictated by work load
  • Ability to work away from primary work location in excess of normal work day
  • Ability to travel outside the US
  • Excellent verbal and written communication skills; ability to understand and explain company policy concerning hydrogeologic practices to executives, managers, employees, and clients
  • Ability to work under pressure and meet tight deadlines
  • Knowledge of and experience with groundwater modeling software.
  • Proficient user of computer systems; Microsoft office software (word, excel, outlook), groundwater and contaminant modeling software, and documentation control systems
  • Must be able to provide a clean driving record & have a valid Driver’s License
  • Preferred candidate will have experience in Hawaii
  • Preferred candidate will have experience working with Department of Defense and regulatory agencies

GSI Service Group Inc. is an equal opportunity and affirmative action employer that consciously builds inclusive teams and is proud to support a diverse environment that considers all qualified applicants for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status.