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Open Positions

Project /Senior Staff Hydrogeologist

Associated Earth Sciences, Inc. (AESI) is a mid-sized professional hydrogeologic, geotechnical engineering, and geophysics consulting firm that has provided focused solutions to a wide range of private and public sector clients since 1981. Our success depends on the growth, advancement, and achievement of our employees. AESI’s hydrogeology group has an immediate opening for a Senior Project, Project, or Senior Staff Hydrogeologist with numerical groundwater modeling experience in our Mount Vernon, Tacoma, or Kirkland office. This is an opportunity for a variety of work experiences and receive strong mentorship while working closely with other AESI technical disciplines in a casual work environment.


  • Performing a variety of geologic and hydrogeologic field work including subsurface exploration, aquifer testing, infiltration testing, groundwater level monitoring, and water quality sampling.

  • Development and calibration of numerical groundwater flow (MODFLOW) models to analyze groundwater systems.

  • Analysis of geologic and hydrogeologic data.

  • Analysis of water rights data.

  • Preparation of technical reports and graphics.


  • Bachelor’s degree or higher in Geology, Hydrogeology, or related discipline

  • Washington State Geologist-in-Training (GIT) license.

  • Washington State Hydrogeologist or Geologist License preferred.


  • 4 to 10 years of consulting experience in the field of geology, hydrogeology, and/or water rights.

  • Working knowledge of relevant state and federal regulations (e.g. water rights, stormwater management)

  • Proficiency using industry standard groundwater modeling software (e.g. Groundwater Vistas [MODFLOW])

  • Excellent attention to detail and accuracy

  • General understanding of and interpretation of hydrogeologic data

  • Excellent organization, project management, and client communication skills

  • Strong written and verbal communication skills



Job Type: Full-time

Salary: $75,000.00 - $100,000.00 per year

  • Medical, Dental Vision – Paid by AESI

  • Performance Bonus

  • 401K with matching

  • HSA and Café Plan

  • Paid Holidays, Vacation and Sick time

  • Continuing Education Opportunities

  • Work Location: Mount Vernon, Tacoma, or Kirkland, WA

  • Flexible Schedule with remote work option


  • Generally, office-based work using a PC.

  • Balanced fieldwork in variable weather conditions at construction sites.

  • No overnight travel required.


  • We provide competitive compensation and generous benefits, including health coverage, a substantial 401K match, and paid holidays and vacation time. Our best estimate for the salary for this role is $75,000 to $100,000 and will depend on the qualified candidate’s experience and internal equity.

  • At AESI, we offer a supportive and inclusive work culture that emphasizes continuous professional growth. As part of our team, you'll have access to a range of opportunities for development, from monthly technical and safety roundtables to reimbursements for local professional events and online training.

  • Engage with our highly collaborative, interdisciplinary team of geotechnical engineers, geologists, scientists, and geophysicists, learning from their collective expertise (and sharing yours!).

  • We practice a flexible work environment, encouraging in-office work to foster team camaraderie and development of early career staff while supporting hybrid working arrangements as appropriate for the role requirements. Our organizational structure and an open-door policy foster collaboration and accessibility to senior leadership.

  • Join us in celebrating work-life balance through various activities like office barbecues, happy hours, holiday parties, and other social events, making AESI a fulfilling place to grow both professionally and personally.


We welcome all qualified applicants, regardless of background. Reasonable accommodation is available during the application process; please contact HR at for assistance.

At AESI, we believe that inclusivity is essential to creating a better world.  We define inclusivity as creating an environment where everyone is treated with respect, dignity, and fairness, and where everyone has equal access to information, services, and opportunities.  

Our company provides an all-inclusive work environment that is accepting, welcoming, and affirming. 

AESI is an employee-owned company that offers competitive pay, generous benefits, and substantial professional development opportunities. If you are a team player with strong technical and management skills that are looking for a collaborative work environment in which to continue your professional growth, please submit a current resume and cover letter.

Qualified applicants will be subject to a background check.

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