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Computational Hydrologist

Oak Ridge National Laboratory
Oak Ridge, Tennessee
Closing date
Oct 18, 2021

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The Watershed Systems Modeling Group within the Environmental Sciences Division (ESD) at Oak Ridge National Laboratory seeks a computational hydrologist or computational watershed scientist to help develop next-generation watershed modeling tools for assessing water availability and water quality in a changing climate. We are seeking a highly motivated, organized and talented individual to join a growing, multi-disciplinary team of researchers who are developing new modeling tools for watershed hydro-biogeochemical function based on state-of-the-art parallel integrated surface/subsurface simulations and emerging machine learning methods.


Major Duties/Responsibilities:  

If selected, you will contribute to development, performance optimization, and testing of multiscale and spatially resolved models of groundwater and watershed hydrology and reactive transport using mid-range and leadership class supercomputers. Working with others, you will evaluate the new models with observations and participate in projections of water availability and water quality in a changing climate.


Qualifications Required:

 A PhD and at least two years post-PhD experience in hydrology, engineering, applied mathematics, computational science or a related field is required as is demonstrated experience in high-performance computing. Demonstrated experience with spatially resolved simulations on high-performance computers is essential. Excellent oral and written communication skills and the ability to work both independently and as a key contributor to a multidisciplinary team are also required.


Preferred Qualifications:

Experience with groundwater hydrology, catchment hydrology, reactive transport modeling, or related application areas would be highly advantageous. Experience with C++, Python, software engineering for research codes, and parallelization of unstructured-mesh codes would also be an advantage. Experience with machine learning applied to hydrology or other environmental systems is also of interest.


About the Environmental Sciences Division (ESD):

ESD is an interdisciplinary research and development organization with more than 60 years of achievements in local, national, and international environmental research. Our vision is to expand scientific knowledge and develop innovative strategies and technologies to help sustain the Earth’s natural resources.


This position will remain open for a minimum of 5 days after which it will close when a qualified candidate is identified and/or hired.

We accept Word (.doc, .docx), Adobe (unsecured .pdf), Rich Text Format (.rtf), and HTML (.htm, .html) up to 5MB in size. Resumes from third party vendors will not be accepted; these resumes will be deleted and the candidates submitted will not be considered for employment.

If you have trouble applying for a position, please email

ORNL is an equal opportunity employer. All qualified applicants, including individuals with disabilities and protected veterans, are encouraged to apply.  UT-Battelle is an E-Verify employer.


Oak Ridge National Laboratory is the largest science and energy national laboratory in the Department of Energy system. ORNL’s scientific programs focus on materials, neutron science, energy, high-performance computing, systems biology and national security. ORNL partners with the state of Tennessee, universities and industries to solve challenges in energy, advanced materials,manufacturing, security and physics. The laboratory's science and technology innovations are translated into applications for economic development and global security. The laboratory is home to several of the world’s top supercomputers and is a leading neutron science and nuclear energy research facility that includes the Spallation Neutron Source and High Flux Isotope Reactor. ORNL hosts a DOE Leadership Computing Facility—home of the Titan supercomputer; one of DOE’s nanoscience centers—the Center for Nanophase Materials Sciences; the BioEnergy Science Center—one of DOE’s Energy Research Centers; and the Consortium for Advanced Simulation of Light-Water Reactors, a DOE Innovation Hub.

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