Hydrologist

Summary This position is the lead physical scientist for hydrology & geomorphology on the TRRP Science Branch team. Involves managing technical studies, integrating results into program guidance, and providing scientific & design input for restoration projects such as flow releases, bank work, gravel augmentation, riparian & floodplain restoration, sediment management, and watershed improvements. Focuses on developing flow-release hydrographs & evaluating geomorphic, hydrologic, and thermal responses. Duties This position is located within the Department of the Interior, Bureau of Reclamation, Trinity River Restoration Division in Weaverville, California. In this role, you will apply advanced hydrologic principles and analytical methods to evaluate water resources, support park management decisions, and ensure compliance with federal policies. You will provide technical expertise, conduct field investigations, analyze data, and prepare scientific reports to guide resource protection and operational planning. Hydrologist (GS-09/11/12)

• Major Duties Collect and analyze water data using field instruments, computer models, and mapping software to support water resource projects and studies. Prepare technical reports and present findings to project teams, using clear visuals and summaries to inform decisions on water management. Coordinate with engineers, biologists, and other specialists to plan and carry out field investigations, ensuring accurate data collection and safe operations. Review and interpret regulations, policies, and scientific literature to recommend solutions for water quality, supply, and environmental compliance issues. Lead or contribute to project planning, budgeting, and progress tracking, using project management tools and collaborating with internal and external partners. Progression by Grade
• duties will be developmental in nature when filled below the full performance level. At the GS-09 (starting) level, perform tasks under close supervision, focusing on learning procedures and applying established methods. At the GS-11 (developmental) level, work more independently, handle moderately complex assignments, and begin to provide technical guidance to others. At the GS-12 (full performance) level, serve as a technical expert, lead projects, and make recommendations that influence program direction and resource allocation. Physical Demands: The work is typically performed in an office setting with no special physical demands. However, work may also be performed in the field which involves periods of walking, bending, climbing, or driving motor vehicles to worksites. The work may also involve some overnight travel for training, meetings, and site visits. The work regularly combines both office and field assignments. Field work requires physical exertion, such as long periods of standing, or recurring and considerable walking, stooping, bending, crouching, crawling, and climbing such as in regular and periodic construction activities and field inspections. Work may also include frequent lifting of moderately heavy items weighing less than 50 pounds. Field assignments may also involve operating small watercraft, driving motor vehicles to work sites, some of which may be remote, and include overnight stays in remote locations. Work Environment: The work is usually performed in an office setting. However, work time may also be spent periodically visiting field sites. Field site visits are typically performed in either an outdoor setting subject to weather changes, diverse terrain, and safety hazards associated with working around complex features and/or construction, or an industrial setting subject to noise, fumes, and moving machinery. Both settings may require the use of personal protective equipment. Safety precautions and protocols are observed at all times and the scientist complies with safety instructions and regulations and ensures individual and others safety by promptly reporting unsafe acts, unsafe conditions, and accidents to the supervisor. The work involves regular and recurring exposure to moderate risks, discomforts, and unpleasantness such ask high noise levels, infectious materials, or toxic or irritating chemicals; travel in safety approved small aircraft and watercraft; high winds and low or high temperatures; infestation of dangerous reptiles or poisonous plants, snakes, or insects; adverse weather conditions; noxious fumes; flammable liquids; or radiation. The work involves performing tasks in close proximity to rotating heavy mechanical and electrical machinery and may involve working within confined spaces for extensive periods of time. Special safety precautions such as protective clothing and gear are necessary. Safety precautions and protocols are observed at all times and the scientist complies with safety instructions and regulations and ensures individual and others safety by promptly reporting unsafe acts, unsafe conditions, and accidents to the supervisor. Qualifications All qualifications must be met by the closing date of this announcement-10/01/2026-unless otherwise stated in this vacancy announcement. To receive credit for experience, your resume MUST state either "full-time" (or "40 hours a week") or "part-time" with the number of hours worked per week to ensure proper crediting of specialized experience. Failure to adequately provide information needed to determine number of hours worked in each position may result in that time not being credited when evaluating qualifying experience. For periods of time that reflect military service, the DD-214 or Statement of Service is sufficient to meet the full and/or part-time hours requirement as the service dates will be reflected. Minimum Qualification Requirements: To qualify for this position, you must meet the following minimum qualifications: Basic Educational Requirement AND Specialized Experience for the series to which you are applying. Basic Educational Requirements: In addition to the specialized experience requirements for this position, you must meet at least one of the following: Degree: physical or natural science, or engineering that included at least 30 semester hours in any combination of courses in hydrology, the physical sciences, geophysics, chemistry, engineering science, soils, mathematics, aquatic biology, atmospheric science, meteorology, geology, oceanography, or the management or conservation of water resources. The course work must have included at least 6 semester hours in calculus (including both differential and integral calculus), and at least 6 semester hours in physics. Calculus and physics, as described above, are requirements for all grade levels. OR Combination of education and experience in course work as shown in A above, plus appropriate experience. Acceptable experience must have included performance of scientific functions related to the study of water resources, based on, and requiring a professional knowledge of related sciences and the consistent application of basic scientific principles to the solution of theoretical and practical hydrologic problems. AND To qualify for the GS-9 position; Possess one full year of experience equivalent in responsibility and scope to the GS-07 grade level (obtained in the private, state, or federal sector). Specialized experience includes performing hydrologic or hydraulic modeling and/or analysis for studies for a wide variety of projects and investigations under the supervision of a senior team member. OR have successfully completed a masters or equivalent graduate degree or 2 full years of progressively higher level graduate education leading to such a degree in a field which demonstrates the knowledge, skills, and abilities necessary to perform the work of the position, such as courses in hydrology, the physical sciences, geophysics, chemistry, engineering science, soils, mathematics, aquatic biology, atmospheric science, meteorology, geology, oceanography, or the mana