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Senior Hydrogeologist

GSI Service Group, Inc.
Boulder, CO Full Time
POSTED ON 9/22/2026
AVAILABLE BEFORE 10/21/2026

JOB SUMMARY

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

DUTIES AND RESPONSIBILITIES

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.

MINIMUM QUALIFICATIONS, SKILLS, AND EDUCATIONAL REQUIREMENTS

  • 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

Salary.com Estimation for Senior Hydrogeologist in Boulder, CO
$107,203 to $145,785
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