Summary You will serve as a HYDROLOGIST within the Geology, Energy & Minerals Science Center located in Reston, VA, leading or participating on subsurface hydrologic studies of considerable scope and complexity or serving as a project leader or member of an interdisciplinary team.
Duties At the full performance level (GS-13) the major duties of this position include, but are not limited to the following:
- Conduct fundamental and applied research in subsurface hydrology, multiphase flow through porous media, poromechanics, and related geoscience disciplines.
- Design, develop, and execute numerical simulations of single- and multiphase fluid flow in geologic formations, including evaluation of physical and thermodynamic impacts associated with fluid injection.
- Translate data from real-world geologic systems into conceptual and computational models, applying sound scientific judgment while accounting for inherent uncertainties.
- Collaborate effectively within multidisciplinary teams to provide technical expertise, communicate scientific results, and prepare comprehensive written reports supported by tables, figures, and charts. Present complex findings on geologic energy resources to scientific audiences at national and international conferences.
- Apply artificial intelligence and machine learning methods to enhance numerical modeling and simulation workflows, integrating advanced computational tools into research activities.
Duties will be developmental in nature when filled below the full performance level.
You may be required to travel overnight away from home up to 1-2 nights per month. You must obtain a government charge card for travel purposes.
Salary:
GS-12: $102,415 (step 1) - $133,142 (step 10)
GS-13: $121,785 (step 1) - $158,322 (step 10)
First time hires to the Federal government normally start at the step 1 rate.
Qualifications
All qualifications must be met by the closing date of this announcement-11/06/2026-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/OR 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:
- A. 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. You must submit transcripts.
-OR-
- B. Combination of education and experience: course work as shown in A above, plus appropriate experience or additional education.
-AND-
To qualify for this position at the GS-12 grade level:
- Specialized Experience Requirement: you must possess at least one full year of specialized experience equivalent to the GS-11 level in the Federal service (obtained in either the public or private sectors). Specialized experience must include fundamental or applied research in subsurface hydrology or multiphase flow through porous media. Experience could include assisting in selecting, constructing, calibrating, and validating numerical groundwater models; integrating field observations, geologic data, and hydrologic measurements; and simulating groundwater flow, aquifer responses, and groundwater-surface water interactions under varying hydrologic and management conditions. At this level, experience should demonstrate a very good knowledge of the principles of hydrology and their application, and the ability to independently perform scientific work of considerable difficulty. You must include hours per week worked.
-OR-
To qualify for this position at the GS-13 grade level:
- Specialized Experience Requirement: you must possess at least one full year of specialized experience equivalent to the GS-12 level in the Federal service (obtained in either the public or private sectors). Specialized experience must include leading a team in fundamental or applied projects of subsurface hydrology or multiphase flow through porous media. Experience could include selecting, constructing, calibrating, and validating numerical groundwater models; integrating field observations, geologic data, and hydrologic measurements; and simulating groundwater flow, aquifer responses, and groundwater-surface water interactions under varying hydrologic and management conditions. The complexity of this work typically required extensive modification and adaptation of standard procedures, methods, and techniques, and the development of totally new methods and techniques to address novel or obscure problems for which guidelines or precedents were not substantially applicable. At this level, experience should demonstrate extensive knowledge of the principles of hydrology and highly developed ability in their application, and wide latitude for the exercise of independent judgment to perform scientific work of marked difficulty and responsibility. You must include hours per week worked.
Volunteer Experience: Experience refers to paid and unpaid experience, including volunteer work done through National Service programs (e.g., Peace Corps, AmeriCorps) and other organizations (e.g., professional; philanthropic; religious; spiritual; community, student, social). Volunteer work helps build critical competencies, knowledge, and skills and can provide valuable training and experience that translates directly to paid employment. You will receive credit for all qualifying experience, including volunteer experience.Education This position does not allow substituting education for experience.
This position has a mandatory education requirement.
You must submit a copy of your transcript(s) to support claimed education if substituting education for experience. Transcripts must include your name, school name, grades, credit hours earned, major(s), grade point average or class ranking, and date the degree was conferred, if applicable. A typed list of courses, grades, semester/quarter hours, GPA, etc. will not be accepted. Non-submission may result in being rated not qualified for the position. Unofficial transcripts are acceptable, but if you are selected for this position and you used your education to qualify, you must provide official transcripts before you begin work.
Foreign Education: To receive credit for education completed outside the United States, you must show proof that the education has been submitted to a private organization that specializes in interpretation of foreign educational credentials and such education has been deemed at least equivalent to that gained in conventional U.S. education programs. Recognition of Foreign Qualifications | U.S. Department of Education. https://www.ed.gov/about/initiatives/international-affairs/recognition-of-foreign-qualification
Requirements
- Must be a U.S. Citizen or National.
- Appointment subject to background investigation and favorable adjudication.
- Males born after 12-31-59 must be registered for Selective Service.
- Direct Deposit participation required.
- Successfully pass the E-Verify employment verification check. To learn more, visit www.dhs.gov/EVerify/.
- Must have and maintain a valid driver's license throughout employment.
- You must pass a physical examination.
- You are required to complete training, obtain and maintain a government credit card with travel and purchase authority.
As a condition of employment for accepting this position, you will be required to serve a 1-year probationary period during which your fitness and whether your continued employment advances the public interest will be evaluated.
This probationary period is an extension of the appointment process and therefore requires the agency to determine if continued employment would advance the public interest, meet the organization goals and mission of the agency, and/or otherwise promote the efficiency of the service. In determining if your employment advances the public interest, the agency will consider:
- your performance and conduct;
- the needs and interests of the agency;
- whether your continued employment would advance organizational goals of the agency or the Government; and
- whether your continued employment would advance the efficiency of the Federal service.
Under applicable law, the employment of an individual serving a probationary or trial period automatically terminates when that period ends unless the agency affirmatively certifies, in writing, that the individual's employment should continue and that their appointment should be finalized. In the absence of agency action to affirmatively certify continued employment beyond the probationary or trial period, such appointments are terminated.
Upon completion of your probationary period your employment will be terminated unless you receive certification, in writing, that your continued employment advances the public interest. How you will be evaluated Your qualifications will be evaluated based on your application materials (e.g. resume, supporting documents), the responses you provide on the application questionnaire, and the result of any additional assessment(s) required for this position.
Your resume must not exceed 2 pages. Only the document submitted as the "Resume" under the Documents section will be used to determine your qualifications/eligibility and for rating purposes. In the event you submit more than one resume, only the latest submission will be reviewed.
Candidates will be rated and ranked using Category Rating procedures. These procedures place candidates with veteran's preference above non-preference eligibles within each category. Veterans with a service-connected disability of at least 10 percent are listed in the highest quality category, except when the position being filled is scientific or professional at the GS-09 grade level or higher. Under Category Rating, candidates will be rated and ranked into the following categories:
• Best Qualified - applicants possessing experience that substantially exceeds the minimum qualifications of the position including all selective factors and are highly proficient in all requirements of the job and can perform effectively in the position
• Well Qualified - applicants possessing experience that exceeds the minimum qualifications of the position including all selective factors and are proficient in most of the requirements of the job
• Qualified - applicants possessing experience that meets the minimum qualifications of the position including all selective factors and are proficient in some, but not all of the requirements of the job.
You will be assessed in the following competencies (knowledge, skills, abilities, and other characteristics):
- Analytical
- Communication
- Data Interpretation
- Data Management
- Modeling and Simulation
- Program Management
- Reasoning
- Research
- Technology Application
Overstating your qualifications and/or experience in your application materials or application questionnaire may result in your removal from consideration. Cheating on an assessment may also result in your removal from consideration.
To be considered for this position, you must complete all required steps in the process. In addition to the application and application questionnaire, this position requires successful completion of additional assessment(s), including a structured resume review. These assessments measure the critical competencies listed above that are required to successfully perform the job.
Current or former displaced Federal employees who are surplus, displaced, or involuntarily separated have special priority selection rights under the Agency Career Transition Assistance Program (CTAP) or the Interagency Career Transition Assistance Program (ICTAP). To be considered under CTAP/ICTAP, you must be well-qualified, score at least 85 (i.e., meet the minimum qualification requirements, including any selective placement factors; education, and experience requirements), and be able to perform the duties of the position upon entry.
Providing false or misleading information on your resume or supporting documentation may result in removal from consideration or other action consistent with applicable federal hiring regulations. Applicants who include vulgar, offensive, or inappropriate language or information in their application package will be ineligible for further consideration for this position. How to apply Please read the entire announcement and all the instructions before you begin an application. To apply for and be considered for this position, you must complete all required questionnaires, assessments and submit all required documentation as specified in the How to Apply and Required Documents section. The complete application package must be submitted by 11:59 PM (ET) on the 11/06/2026--unless otherwise stated in this vacancy announcement to receive consideration.
The application process is as follows:
- Click the Apply Online button.
- Answer the questions presented in the application and attach all necessary supporting documentation. To PREVIEW the application questionnaire, select the following link: https://apply.usastaffing.gov/ViewQuestionnaire/13099091
- Click the Submit Application button prior to 11:59 PM (ET) on the announcement closing date.
To update your application, including supporting documentation: During the announcement open period, return to your USAJOBS account, find your application record, and click Edit my application. This option will no longer be available once the announcement has closed.
To view the announcement status or your application status, visit https://help.usajobs.gov/how-to/application/status.
Applicants who apply under this job opportunity announcement agree to have their application, associated documents and applicable personal information shared with other Bureaus/Offices within the Department of the Interior (DOI) who have vacancies within the same occupational series, grade, full performance level and in the same geographic location(s), including within the same metro/commuting area. Applying to this announcement does not replace the need to apply to other job opportunity announcements for which you wish to receive consideration. Other information Additional vacancies may be filled using this job announcement.
Promotion to the full performance level is neither guaranteed nor implied and will be based solely on your ability to satisfactorily perform the work of the position, existing work at the higher grade level, and recommendation by the position's supervisor.
Physical Demands/Work Environment: 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 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
All Department of Interior (DOI) employees, their spouses, and minor children may not acquire or retain any claim, permit, lease, small tract entry, or other rights granted by the Department in Federal lands, with limited exceptions. Additional ethics prohibitions can be found here, https://www.doi.gov/ethics/ethics-prohibitions.
The duties of this position are suitable for telework and the selectee may be allowed to telework with supervisor approval.