Postdoctoral Appointee in Modeling Physical Systems
- Sandia National Laboratories
- Location: Livermore, CA
- Job Number: 7081061 (Ref #: 677240)
- Posting Date: Jul 10, 2021
Job DescriptionThis posting will be open for application submissions for a minimum of seven (7) calendar days, including the ‘posting date’. Sandia reserves the right to extend the posting date at any time. : We are seeking a Postdoctoral Appointee to join the Mechanics of Materials department! This position is research and publication oriented and focused on using machine learning and related techniques to model physical systems. Ability to create innovative and effective models merging machine learning frameworks and physical knowledge in both low and high data regime is required. Data will come from a variety of sources including experiments and high-fidelity simulations. Some of the applications of the research will be: surrogate models for optimization, exploration and uncertainty quantification; and embedding sub-grid physics in large-scale simulations. This position can be a virtual worker position located anywhere in the United States. Some travel may be required .
+ Ph.D. in a field of physical sciences, applied mathematics, or closely related field. + Experience in scientific computing, algorithm and software development. + Experience in machine learning, optimization and physics.
+ Experience in physical simulation, particularly continuum mechanics. + Experience in Python, Pytorch or Keras/Tensorflow, and/or scikit-learn. + Experience adapting 3rd party packages + Ability to handle generation and collection of large datasets (batch submission, scripting, and related experience). + Experience in performing interdisciplinary research. + Strong interpersonal skills and ability to work remotely within a small diverse group. + Experience in open source/collaborative software project development (e.g. version control, benchmarking, git).
The Mechanics of Materials Department performs experimental and analytical studies to characterize and predict the thermal-mechanical behavior of materials, from atoms to continuum, specializing in fracture and failure. Our experimental work covers the spectrum of discovery to characterization to model validation. Motivated by observations, we develop mathematical models to simulate material responses under various loading and environmental conditions. The fidelity of our models and simulations varies from atomic to continuum scales. We develop numerical methodologies so that our material models can be implemented in high-performance computing simulations. Our experimental capabilities include characterizing materials over a wide range of temperatures and strain rates, developing micro- and nanoscale strain and displacement diagnostics, and testing subsystems to support model validations.
Sandia National Laboratories is the nation’s premier science and engineering lab for national security and technology innovation, with teams of specialists focused on cutting-edge work in a broad array of areas. Some of the main reasons we love our jobs:• Challenging work with amazing impact that contributes to security, peace, and freedom worldwide• Extraordinary co-workers• Some of the best tools, equipment, and research facilities in the world• Career advancement and enrichment opportunities• Flexible work arrangements for many positions include 9/80 (work 80 hours every two weeks, with every other Friday off) and 4/10 (work 4 ten-hour days each week) compressed workweeks, part-time work, and telecommuting (a mix of onsite work and working from home)• Generous vacations, strong medical and other benefits, competitive 401k, learning opportunities, relocation assistance and amenities aimed at creating a solid work/life balance* World-changing technologies. Life-changing careers. Learn more about Sandia at: http://www.sandia.gov*These benefits vary by job classification.
This position does not currently require a Department of Energy (DOE) security clearance. Sandia will conduct a pre-employment drug test and background review that includes checks of personal references, credit, law enforcement records, and employment/education verifications. Furthermore, employees in New Mexico need to pass a U.S. Air Force background screen for access to Kirtland Air Force Base. Substance abuse or illegal drug use, falsification of information, criminal activity, serious misconduct or other indicators of untrustworthiness can cause access to be denied or terminated, resulting in the inability to perform the duties assigned and subsequent termination of employment. If hired without a clearance and it subsequently becomes necessary to obtain and maintain one for the position, or you bid on positions that require a clearance, a pre-processing background review may be conducted prior to a required federal background investigation. Applicants for a DOE security clearance need to be U.S. citizens. If you hold more than one citizenship (i.e., of the U.S. and another country), your ability to obtain a security clearance may be impacted. Members of the workforce (MOWs) hired at Sandia who require uncleared access for greater than 179 days during their employment, are required to go through the Uncleared Personal Identity Verification (UPIV) process. Access includes physical and/or cyber (logical) access, as well as remote access to any NNSA information technology (IT) systems. UPIV requirements are not applicable to individuals who require a DOE personnel security clearance for the performance of their SNL employment or to foreign nationals. The UPIV process will include the completion of a USAccess Enrollment, SF-85 (Questionnaire for Non-Sensitive Positions) and OF-306 (Declaration of for Federal Employment). An unfavorable UPIV determination will result in immediate retrieval of the SNL issued badge, removal of cyber (logical) access and/or removal from SNL subcontract. All MOWs may appeal the unfavorable UPIV determination to DOE/NNSA immediately. If the appeal is unsuccessful, the MOW may try to go through the UPIV process one year after the decision date.
All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, or veteran status and any other protected class under state or federal law. : This postdoctoral position is a temporary position for up to one year, which may be renewed at Sandia's discretion up to five additional years. The PhD must have been conferred within five years prior to employment. Individuals in postdoctoral positions may bid on regular Sandia positions as internal candidates, and in some cases may be converted to regular career positions during their term if warranted by ongoing operational needs, continuing availability of funds, and satisfactory job performance.
All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or veteran status.