Senior Fisheries Biologist

Job Locations US-CA-Sacramento
Job ID
# of Openings


Who is RES: We are the nation’s largest and most experienced provider of ecological restoration and water resource solutions. To date, we have restored over 525 stream miles and 62,000 wetland acres, in addition to conserving and preserving 15,000 acres of endangered species habitats. RES operations include planting over 20,000,000 restorative trees and reducing over 280 tons of polluting nutrients. RES ecological solutions enable a balance of economic development and ecological sustainability.


Our culture: Working for RES means having a career that truly makes an impact and a job that helps make nature and communities better. Our people share a deep interest and passion for sustainability and ecological restoration. As an ever-growing company, we cultivate entrepreneurship, flexibility, and collaboration while taking a bold approach to project development. We foster a team environment while enriching individual growth.


Our people: explore our employees’ profiles here.


Interested in joining us? We are accepting applications for an experienced Fisheries Biologist for our office in Sacramento, CA to work on large-scale restoration and mitigation projects in the California, with focus on the Central Valley and Bay-Delta System.

The mission: to contribute to the restoration of native fish populations and their habitat in California, including Delta smelt, longfin smelt, Chinook salmon, steelhead, sturgeon, and lamprey! Orchestrating large scale fisheries and aquatic driven restoration projects is a delicate matter, so we expect you to be fully actualized on current fisheries and aquatic science research, monitoring efforts, and research practitioners in Central Valley and Bay-Delta.

RES is a complex organism. Together with the support of senior ecological staff, you will design, implement, and monitor restoration projects, in collaboration with a team of fisheries biologists, field ecologists, restoration designers, and environmental land operators. Dealing with this amount of people involves excellent communication skills, a lot of organization skills, and impeccable time management!


What your day-to-day might look like?

What your day-to-day might look like?


You will be working on the new or existing project with field components, 30% of the time. You will research and identify suitable properties to recover listed species in priority locations of the California Central Valley and Bay-Delta System, supported by our team of analysts.

Note that you will visit these locations personally, so be ready for travel and sometimes stay overnight. We also perform our work in physically challenging outdoor situations in all types of weather!

When you are in the field you will be responsible for informing the team on ecological suitability of the onsite aquatic habitats. Project work can be variable, and may involve sampling fish populations, identification of anadromous and resident fishes, taking hydrological measurements, participating in instream flow studies, assessing habitat quality of stream channels and their floodplains, and monitoring water quality. You will be responsible for producing or managing the development of technical reports and feasibility studies at this project stage.


Once the location is identified and a project becomes active, you will develop restoration and monitoring plans, and this will take you up to 40% of your time. Your technical guidance and work might include support for restoration actions to improve fish passage, remove a dam, increase stream and floodplain habitat quality, lead a fish rescue and relocation effort, analyze fish translocation, prepare a pit tagging strategy, or a combination of several of these elements. You will present your plan to the senior management. Once approved, you will also be part of meetings with regulatory agencies, clients, and teaming partners, as part of the project.


Once the plan is approved and implemented by our field team, you will monitor it closely, and this will take up to 30% of your time. You will conduct and lead crews on fish surveys and inventories to make sure your plan is working. You will then recommend corrective actions, if needed, based upon collected field data, public databases, and published literature.



We would love to talk to you if you have many of the following:

  • Bachelor's degree in ecology, biology, limnology, or another aquatic-related discipline.
  • 8+ work experience in mitigation, habitat restoration, and/or fisheries.
  • Permitting and regulatory compliance experience.
  • Knowledge of ARCGIS and GPS technology.

What will make you stand out?

  • Experience with CEQA/NEPA/ESA/FERC regulatory documents and their biological measures.
  • Advanced degree – Masters or PhD in an ecological field
  • Section 10(a)(1)(A) recovery permits and CDFW MOUs.
  • Demonstrated experience with floodplain, wetland, and tidal food web processes.
  • A long-term career vision that involves senior leadership in Northern California fisheries issues.


VEVRAA Federal Contractor


RES is an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability status, protected veteran status, or any other characteristic protected by law.


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