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Field Hydrologist

Environmental Science Associates
$112,084-$155,001 USD
United States, California, San Jose
Oct 16, 2025

Environmental Science Associates (ESA) is a 100% employee-owned environmental consulting firm. We plan, design, permit, mitigate, and restore for projects across our communities, infrastructure systems, open spaces, and wildlands. We are 50 years strong in 21 offices across California, the Pacific Northwest, and the Southeastern United States.

ESA is seeking a highly motivated Field Hydrologist to join our team of hydrologists, geomorphologists, ecologists, and engineers in the Northern California region. We are looking for a dedicated and enthusiastic team member with 10+years of work experience, a passion for ecosystem restoration, working outdoors, and the desire to learn and grow. This is an exempt, full-time, salary role with flexible hybrid expectations. Qualified candidates must be able and willing to work hybrid from one of our Northern CA ESA office locations as needed. Preference given to candidates within a commutable distance to our following ESA Office locations: Sacramento, Oakland, San Francisco, or Petaluma. This role will involve some travel for site visits, projects, and in-person team collaboration as needed.

Work samples may be requested as a step in the interview process.

Who You Are



  • You must have proficient working knowledge in MATLAB or Python preferred. Candidates with experience in R will also be considered.
  • You must have prior professional working experience with topo-bathymetric surveys (Hypack) OR continuous monitoring networks
  • You must have experience with ArcGIS
  • You must have experience with QA/QC of scientific datasets
  • You enjoy working outdoors, and you have 10+ years of professional work experience in scientific data collection and quality control (possibly including topographic and/or bathymetric surveying, UAV, sidescan sonar, ADCP, stream gauging, sediment studies, water quality monitoring and sampling, or other related skills), including project management experience.
  • The ideal candidate has extensive professional experience with continuous hydrodynamic and water quality data collection and telemetered data delivery systems.
  • You hold a Bachelor's and/or Master's degree in Civil/Environmental Engineering, Hydrology, Land Surveying, Water Quality, or a related field.
  • You are an effective team member with excellent oral and written communication skills who can work independently and collaboratively in a multi-disciplinary environment.
  • You can communicate technical information clearly and concisely to individuals and groups.
  • You are comfortable working in and around water, and you have experience working with tools and on boats.
  • Preference given to qualified candidates with any of the following skillsets: Certified/Trained Boat Operator, Sidescan Sonar skills, FAA Certified Drone Pilot w/ LiDAR, Estuarine Water Quality Analysis, Certified Hydrographer or Professional land surveyor
  • You enjoy fieldwork and can walk long distances carrying a backpack; andare able to lift at least 50 pounds. You are confident working outside, in remote and rural settings, as well as in urban environments. Physical outdoor work may include, but may not be limited to, work in all types of weather, traversing uneven ground and sometimes steep terrain in vegetated environments, agricultural fields, arid lands, and along stream banks. You may be exposed to inclement weather and uncomfortable working conditions. Some early morning, late night and/or weekend work, as well as long hours may be required.



What You Will Do for ESA



  • You will plan, schedule and execute field data collection, quality control, and analysis in support of ecosystem restoration, flood management, fish passage and other water resources and environmental engineering projects.
  • You will plan for and execute the deployment and maintenance of instrumentation, topographic and bathymetric surveys, geomorphic, discharge, sediment transport, and wave studies, and construction and post-construction monitoring activities.
  • You will apply Python, Matlab, ArcGIS, AutoCAD, HYPACK, Aquarius, and other tools to process data, develop basemaps, evaluate discharge, tide, and water quality conditions, monitor channel and vegetation development, calculate sedimentation rates, and other tasks.
  • You will write technical reports describing data collection methods and results. You will develop and adhere to data collection and quality control procedures.
  • You will work at your desk and outdoors - on the coast, in estuaries and salt marshes, in streams and rivers, and on boats. You will manage projects and tasks independently and supervise others in executing work assignments.
  • While consistently demonstrating solid data collection, analysis, and writing skills, you thrive in a fast-paced, challenging environment and are able to balance multiple responsibilities and deadlines, both when working on a team or independently.
  • Other ad-hoc tasks as needed



What's Special About Our Team

Our Environmental Hydrology and Design team includes engineers, hydrologists, geomorphologists and landscape architects. Much of our work is oriented toward the restoration of habitat and ecosystem function, often as part of multi-benefit projects. As a highly integrated team, we value creative thinking, teamwork, and multi-disciplinary and cross-disciplinary engagement and integration.

To read about some of our exciting projects, check out these links:

https://esassoc.com/services/restoration/, https://esassoc.com/services/restoration/wetland-restoration/, https://esassoc.com/services/climate-change-resilience/sea-level-rise-coastal-hazards/, https://esassoc.com/services/flood-and-stormwater-management/coastal-zone-engineering-management/.

ESA has established multiple pay ranges tailored to the economic factors in the geographies in which ESA staff reside. For this position, the range is approximately as listed based on our anticipated hiring locations as noted in the above job details. Actual compensation is determined by several factors including but not limited to an individual's related experience, education, skills, and the city in which the applicant lives.

CA Pay Transparency Clause
$112,084 $155,001 USD

Who We Are

We are a 100% employee-owned environmental consulting firm who values diversity and inclusion and celebrate the differences that make each of us unique. Our culture is built on mutual respect, recognizing that our variety of backgrounds, experiences, and perspectives leads to better solutions, which fosters our continued success for our employee-owners and clients.

In accordance with ESA's duty and responsibility to provide and maintain a safe workplace that is free of known hazards and to minimize the exposure to potential hazards, any employee who works from an ESA office or conducts any other in-person ESA work-related activity is required to submit their proof of vaccination status or have received an approved exemption and accommodation in states which this applies.

If you are an applicant with a disability that requires a reasonable accommodation to complete any part of the application process or are limited in the ability-or unable to use-the online application system and need an alternative method for applying, you may contact our Human Resources Department via email:humanresources@esassoc.comfor assistance.

Please include the following in your message so we can promptly address your request:



  • Full name
  • The best method to contact you (phone number and/or email address)
  • Title of Job Position Applied
  • Description of your accommodation request



ESA is an Equal Opportunity Employer, committed to a diverse and inclusive work environment. (EOEM/V/F/D)

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