Jobs in the United States

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Added 7 mins ago
Director - Network Infrastructure Security & Engineering
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Chicago, IL
Architect and engineer secure, resilient connectivity across all airports, campus and remote offices, contact centers, cloud, and third-party network connections, embedding network security…
Added 28 mins ago
Human Factors Engineer (HFE)
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…transportation, and citizen services. We’re a nonprofit engineering, applied research, and advanced technology organization working in the public interest. With objectivity and integrity at…
Added 28 mins ago
Controls Engineer, Data Center Engineering
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Added 28 mins ago
Sr. Innovation Engineer
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Insight Global is seeking a Sr. Innovation Engineer to join a prestigious international law firm client. This engineer will join the AI & Innovation function and design secure, scalable AI…
Added 28 mins ago
ML/AI Engineer - Consultant
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As an ML/AI Engineer - Consultant, you build reliable, well-engineered software that applies machine learning and modern AI techniques to real business problems. You take well-defined tasks…
Added 29 mins ago
Systems Engineer, Platform Engineering
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This is a delivery-focused role for someone comfortable moving across a full-stack surface - frontend, backend, and applied AI - without needing deep specialization in any one layer yet.…
Added 29 mins ago
AI / Simulation Principal Engineer - Computational Fluid Dynamics
UL, LLC
Austin, TX
We are seeking a Principal Engineer – CFD Simulation Engineering to join our team. The ideal candidate will be a highly experienced technical leader with deep expertise in physics-based…
Added 29 mins ago
Operations Engineer, Retail Store Operations & Support - Retail & Marcom Engineering
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Austin, TX
…role sits at the intersection of production support, SRE, and applied AI engineering. This is a team scaling fast, going deep technically, and investing heavily in the next generation of…
Added 34 mins ago
Quality Manager
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Added 38 mins ago
Senior Analytical Data Scientist
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Reports to: Senior Principal Machine Learning Engineer
Added 39 mins ago
Senior Core Infrastructure Engineer - OCI Product Catalog (Nashville-TN)
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We are looking for a Senior Core Infrastructure Engineer (IC3) with strong full-stack development experience to help design, build, and operate OCI Product Catalog.
Added 56 mins ago
AI Automation Engineer
Experis USA
Bethesda, MD
Our client, AI & Digital Enablement is seeking a AI Automation Engineer to join their team. As a AI Automation Engineer, you will be part of the AI and Digital Enablement team supporting…
Added 1 hour ago
Sr MTS Electrical Engineer
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Applied Materials is the global leader in materials science and engineering solutions that are at the foundation of virtually every new semiconductor chip and advanced display in the world.…
Added 1 hour ago
Physicist/Scientist III – Photonics Simulation & Layout Engineer
Applied Materials, Inc
Santa Clara, CA
Applied Materials is the global leader in materials science and engineering solutions that are at the foundation of virtually every new semiconductor chip and advanced display in the world.…
Added 1 hour ago
Product Quality Engineer
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Applied Materials is the global leader in materials science and engineering solutions that are at the foundation of virtually every new semiconductor chip and advanced display in the world.…
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Orion GPS Engineer III (E3)
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Applied Materials is the global leader in materials science and engineering solutions that are at the foundation of virtually every new semiconductor chip and advanced display in the world.…
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Platform Center of Excellence Mechanical Engineer
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Mechanical Engineer III -(E3)
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RGM Product Manager
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Added 1 hour ago
Mechanical Engineer III -(E3)
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Applied Materials is the global leader in materials science and engineering solutions that are at the foundation of virtually every new semiconductor chip and advanced display in the world.…
Added 1 hour ago
RA
Staff Embedded Software Engineers
Rivian and Volkswagen Group Technologies
Palo Alto, CA
- $222,000 to $279,000 USD / year
Bachelor’s degree or foreign equivalent in Computer Science, Mechatronics Engineering, Applied Sciences or a closely related field and 4 years of experience in any occupation as Software…
Added 1 hour ago
S
GPU Kernel Engineer
Sciforium
San Francisco, CA
- $190,000 to $250,000 USD / year
We are seeking a highly skilled GPU Kernel Engineer who is passionate about pushing the limits of performance on modern accelerators. In this role, you will design and optimize custom GPU…
Added 1 hour ago
Machine Learning Engineer, AI/ML Model Quality
Apple
Austin, TX · Cupertino, CA · New York City, NY · San Diego, CA
…across Wallet, Payments, and Commerce. As a Machine Learning Engineer, AI/ML Model Quality, you will build and maintain intelligent systems, validation frameworks, synthetic data generation…
Added 1 hour ago
Lead Software Engineer
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As a Lead Software Engineer at JPMorganChase within the Consumer Community Banking Digital Technology department, you are an integral part of an agile team that works to enhance, build, and…

UL, LLC

AI / Simulation Principal Engineer - Computational Fluid Dynamics

Austin, TX, United States

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Job details

Posting language: English
Posted: Jul 10, 2026

Original job description

We are seeking a Principal Engineer – CFD Simulation Engineering to join our team. The ideal candidate will be a highly experienced technical leader with deep expertise in physics-based modeling and simulation, particularly in CFD, thermal-fluid sciences, fire and explosion modeling, refrigerant leakage, battery thermal runaway, combustion, multiphase flows, turbulence modeling, and electronic cooling.

A core requirement of this role is strong expertise in simulation Verification & Validation (V&V), including application of industry-recognized frameworks best practices for ensuring model credibility and reliability.

The candidate should have a strong background in applying advanced simulation methods to complex engineering problems involving product safety, certification, design validation, hazard analysis, and failure investigation. The candidate will be responsible for driving technical excellence, consistency, and engineering quality in simulation methodologies across global teams

Serve as the principal technical authority for advanced simulation projects involving CFD, fire/explosion, refrigerant leakage, battery thermal runaway, combustion, multiphase flows, turbulence modeling, and electronic cooling.
Lead and enforce simulation Verification & Validation (V&V) methodologies, ensuring alignment with ASME V&V 10 / V&V 20 standards, NASA CFD and modeling credibility guidelines, Oberkampf & Roy (Verification and Validation in Scientific Computing) principles, etc.
Define and implement best practices for:
Code verification and solution verification
Model validation against experimental data
Uncertainty quantification (UQ)
Sensitivity analysis
Grid convergence and mesh independence studies
Error estimation and documentation of model limitations
Establish model credibility frameworks for simulation-based decision-making, especially for safety-critical applications.
Lead simulation-based investigations in:
Refrigerant leakage and dispersion (flammability and ignition risk)
Battery thermal runaway propagation and vent gas hazards
Fire, smoke, and explosion dynamics
Combustion and reacting flows
Multiphase and phase-change systems
Electronics cooling and thermal reliability
Ensure test-to-simulation correlation and apply structured V&V approaches to build confidence in simulation predictions.
Develop and review technical reports and documentation with clear articulation of:
Modeling assumptions
Validation evidence
Uncertainty bounds
Applicability and limitations of the model
Act as the technical approver/reviewer for high-impact simulation studies, ensuring V&V rigor before results are used for certification or decision-making.
Guide teams in selecting appropriate modeling approaches (analytical, CFD, reduced order, and digital twins) based on required fidelity and validation maturity.
Work closely with testing, certification, and regulatory teams to ensure simulation outputs are aligned with engineering standards and safety requirements.
Mentor engineers on V&V best practices, simulation credibility, and physics-based modeling techniques.
Contribute to the development of internal V&V guidelines, checklists, and simulation governance frameworks.
Represent the organization in external technical forums, standard committees, and discussions related to simulation credibility and digital engineering.
Ph.D. / Master’s in Mechanical, Aerospace, Chemical, Fire Engineering, Thermal Sciences, or related field (Ph.D. preferred) with 10–12+ years of experience in CFD, simulation, safety engineering, or applied R&D
The candidate is not only a subject-matter expert in simulation physics but also a recognized authority in simulation credibility and V&V.
The candidate should be capable of ensuring that simulation outputs are technically defensible, repeatable, validated, and suitable for high-stakes engineering and certification decisions.
The candidate must demonstrate the ability to bridge advanced physics modeling with structured validation frameworks, enabling confident decision-making in safety-critical applications.
Proficiency in CFD tools: ANSYS Fluent, STAR-CCM+, OpenFOAM, CONVERGE, FDS
Strong fundamentals in: Turbulence (RANS, LES), Heat transfer, Combustion & fire modeling, and Multiphase flows
Hands-on experience in: Refrigerant leakage & gas dispersion, Fire / explosion modeling, Thermal & safety simulations
Experience in test correlation, validation, and technical reporting
Ability to lead complex engineering problems and work with cross-functional teams
Strong communication and documentation skills
Experience in safety, certification, or regulated environments
Exposure to UQ, risk-based modeling, or HPC
Basic scripting (Python/MATLAB)
Core Skills: CFD | Combustion | Multiphase Flow | Refrigerant Leakage | Fire & Explosion | V&V | Thermal Analysis | Risk Assessment

What you’ll experience working for ULS

UL Solutions has been pioneering change since 1894 and we’re still leading the way. From day one, we’ve blazed a trail protecting the planet and everyone on it. Our teams have influenced billions of products, plus services, software offerings and more. We break things, burn things and blow things up. All in the name of safety science.

That’s where you come in - because none of it could happen without you. It takes passion to protect people, problem-solving to safeguard personal data and conviction to make the world a more sustainable place. It takes bold ideas and brilliant minds to build a better world for future generations across the globe.

This is more than a job. It’s a calling. A passion to use our expertise and play our part in creating a more secure, sustainable world today - and tomorrow. As a member of our safety science community, you’ll use your ideas, your energy and your ambition to innovate, challenge and ultimately, help create a safer world.

Everyone here is unique. But we’re also a global community, working together to help create a safer world. Join UL Solutions and you can connect with the brightest minds in the business, all bringing their distinct perspectives and diverse backgrounds together to deliver real change.

Empowering our customers to keep the world safe means thinking ahead. It means investing in training and empowering our people to learn and innovate. At UL Solutions, we help build a better future - one where everyone benefits.

Join UL Solutions to be at the center of safety. To learn more about us and the work we do, visit UL.com

Total Rewards: We understand compensation is an important factor as you consider the next step in your career. The estimated salary range for this position is $142,000 to $190,000 USD and is based on multiple factors, including job-related knowledge/skills, experience, geographical location, as well as other factors. This position is eligible for annual bonus compensation with a target payout of 20% of the base salary. This position also provides health benefits such as medical, dental and vision; wellness benefits such as mental and financial health; and retirement savings (401K) commensurate with the standard rewards offered in each individual location or country. We also provide full-time employees with paid time off including vacation (15 days), holiday and personal days (totaling 12 days) and sick time off (72 hours).

A global leader in applied safety science, UL Solutions (NYSE: ULS) transforms safety, security and sustainability challenges into opportunities for customers in more than 110 countries. UL Solutions delivers testing, inspection and certification services, together with software products and advisory offerings, that support our customers’ product innovation and business growth. The UL Mark serves as a recognized symbol of trust in our customers’ products and reflects an unwavering commitment to advancing our safety mission. We help our customers innovate, launch new products and services, navigate global markets and complex supply chains, and grow sustainably and responsibly into the future. Our science is your advantage.

UL LLC has been and will continue to be an equal opportunity employer. To assure full implementation of this equal employment policy, we will take steps to assure that:

Persons are recruited, hired, assigned and promoted without regard to race, color, age, sex or gender, sexual orientation, gender identity, gender expression, transgender status, religion, creed, national origin, ethnicity, citizenship, ancestry, disability, genetic information, military or veteran status, pregnancy, marital or familial status, or any other protected category under applicable law.

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