Postdoctoral Appointee for Modeling Heterogeneous Materials in Extreme Environments 

Sandia National Laboratories

Albuquerque, NM

Job posting number: #7075946 (Ref:675425)

Posted: March 12, 2021

Job Description

This 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. : Are you passionate about your work and dream of utilizing state-of-the-art facilities to explore solutions? Join a dynamic team that helps tackle some of the most challenging issues facing our nation’s security! We are seeking a Postdoctoral Appointee to join our team and conducting research related to novel modeling approaches for heterogeneous materials in extreme environments (shock, thermal, mechanical impacts, etc.) across multiple length and time scales. Statistical modeling and data analysis approaches will be developed to conduct cross-cutting research and discover new ways to represent material behavior.The qualified candidate will have a strong background in physics-based computational modeling, ideally with some experience in mesoscale and/or heterogeneous material systems. Knowledge in the areas of energetic materials, shock physics, microstructural analysis, statistical modeling and/or machine learning is desired. On any given day, you may be called on to: + Develop, improve, and evaluate computational models for simulating impact-response of heterogeneous materials using finite element, meshfree, or hydrocode approaches + Use high performance computing to run large suites (thousands) of stochastically generated mesoscale models and deploy statistical techniques to understand material response + Use knowledge/trends identified via mesoscale analysis to develop novel approaches to model macroscale material behavior in combined, multiphysics environments + Advance novel concepts in material constitutive models, equations of state, and reactive burn models to include material stochasticity and microstructure information + Conduct research to validate models, present, and publish results + Travel as needed to support projects

Required:
+ PhD, conferred within 5 years prior to employment, in Engineering, Physics, Computer Science, Material Science, Chemistry, Applied Math, or other related field + Experience in modeling heterogeneous or reative materials via computational methods such as finite element, meshfree, hydrocodes, molecular dynamics, etc. + Good communication skills as evidenced by a history of publication of results in peer-reviewed journals and external presentations at appropriate scientific conferences + Ability to obtain and maintain a DoE Q security clearance

Desired:
+ Experience with statistical modeling and/or machine learning methods + Experience with scientific programming (C++, FORTRAN, Python, Matlab, etc.) + Familiarity with high performance computing environments and Linux operating systems + Knowledge of energetic materials and shock-initiation physics + Multi-physics modeling experience (e.g. thermal-mechanical, chemically reacting flows) + Familiarity with microstructural characterization methods and image analysis + Knowledge of damage evolution and failure modeling approaches + Demonstrated ability to work in large, multi-disciplinary teams to solve complex problems + Experience collaborating in multi-organizational environments

Department Description:

The Fluid and Reactive Processes department is responsible for conducting research on coupled transport phenomena (mass, momentum, energy) for processes that span multiple length and time scales (nano ->meso ->macroscale) in support of internal and external customers. This research is applied to advanced manufacturing processes, complex fluids flow, and energetic material response (for assessing manufacturing, safety, and performance of weapon components). This research is used to develop validated numerical predictive tools that we apply to DOE, DOD, and industrial customer problems. Our work spans fundamental research and development to engineering analysis of applied problems. Our basic research activities focus on developing the scientific insights and physical models that will enhance our predictive simulation capabilities. Application projects range from small modeling efforts requiring rapid and agile turnaround to high consequence applications with an emphasis on credibility of model results by exercising and advancing sound V&V/UQ practices. We work closely with experimentalists and code developers to improve the fidelity of supporting tests and to ensure needed code functionality is available.

About Sandia:

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.

Security Clearance:

Sandia is required by DOE to conduct a pre-employment drug test and background review that includes checks of personal references, credit, law enforcement records, and employment/education verifications. Applicants for employment need to be able to obtain and maintain a DOE Q-level security clearance, which requires U.S. citizenship. 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. Applicants offered employment with Sandia are subject to a federal background investigation to meet the requirements for access to classified information or matter if the duties of the position require a DOE security clearance. Substance abuse or illegal drug use, falsification of information, criminal activity, serious misconduct or other indicators of untrustworthiness can cause a clearance to be denied or terminated by DOE, resulting in the inability to perform the duties assigned and subsequent termination of employment.

EEO Statement:

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.


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