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Intern - Heat Transfer/Structural Dynamics Numerical Modeling, R&D Grad Year Round

What Your Job Will Be Like

We are looking for a Heat Transfer/Structural Dynamics Numerical Modeling, R&D Grad Year-Round Intern.

The Thermal/Fluid Science & Engineering Department is seeking an R&D graduate intern for a year-round position supporting thermal-mechanical modeling of structures under thermal stress. Successful candidates have the option to work remotely.

On any given day, you may be called on to:
  •   Work well across several diverse teams
  •   Implement multi-physics models using Sandia simulation codes
  •   Interact closely with engineers, researchers, and analysts across the California and New Mexico sites
  •   Validate, post-process, analyze, present, and document numerical results

Posting Duration

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.

Qualifications We Require

You bring the confidence and skills to be eligible for the job by meeting these minimum requirements:
  • Earned bachelor's degree
  • Currently attending and enrolled full time in an accredited science, engineering, or math graduate program
  • Minimum cumulative GPA of 3.0/4.0
  • Ability to work up to 30 hours per week during the academic year, and up to 40 hours per week during the summer
  • U.S. citizen, asylee, refugee, or lawful permanent resident of the U.S.

Qualifications We Desire

  • Bachelor’s degree in mechanical engineering, material science, or a closely related field
  • Ability to work up to 20 hours per week during the school year
  • Experience modeling complex problems
  • Knowledge and experience with the solid mechanics of materials under mechanical and/or thermal stress
  • Knowledge and experience developing material models for complex systems including mesh creation and problem setup
  • Proficiency in a data processing/plotting/manipulation language (ex: Matlab, Python, or similar)
  • Experience modeling complex thermal/mechanical problems using state-of-the-art computational tools (e.g., Comsol, Fluent, or similar)
  • Demonstrated ability to make original contributions to engineering scienceExperience in processing data using visualization tools, such as Paraview and Ensight, and handling large quantities of data
  • Background in combined thermal and solid mechanics
  • Experience with High Performance Computing (HPC)

About Our Team

Sandia/California's Thermal/Fluid Science and Engineering Department is a diverse multidisciplinary community of engineers and researchers who specialize in fluid mechanics and heat and mass transfer. The work mix in the group includes theory and modeling, scientific and high-performance computing, and applied engineering analysis of experiments and mechanical designs. The group plays two primary roles in science-based engineering at Sandia: (1) developing new computational methods, capabilities and tools to describe fluid mechanics, heat transfer, and thermal response; (2) performing computational analysis to predict the design performance of engineered systems in defense, energy, and industry applications.

Recent activities and R&D areas within the group include: heat transfer and fluid dynamics modeling and analysis for complex multi-material systems, porous media reacting flow, multi-phase flow, turbulent heat transfer, fire and combustion, hydrogen storage and safety technology, wind energy modeling and technology development, geothermal energy technology, contributions to emerging capability and development of the Sandia's climate change initiatives and strategy, and applied uncertainty quantification and verification and validation for all of these application areas.

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:
*These benefits vary by job classification.

Security Clearance

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 needs 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.