Jobs in the United States

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Added 8 mins ago
DH
Secure Network Operations - Technical
DHS Headquarters
Pensacola, FL · Springfield, VA · Arlington, VA · Idaho Falls, ID · Washington, DC · Chandler, AZ · Stennis Space Center, MS
- $106,700 to $214,500 USD / year
…Network Operations, including Systems Administrator, Network Engineer, Distributed Systems Engineer, and Network Operations Specialist. All positions are in the DHS Cybersecurity…
Added 18 mins ago
Principal Software Engineer (Sign-on bonus available)
BAE Systems
Nashua, NH · Austin, TX
Job Description We are looking for a talented, experienced software engineer to join our SW Development team to help us create the world’s most advanced solutions in the area such as…
Added 40 mins ago
Forward Deployed Engineer, Applied AI
Snowplow
Remote, United States
You are the first Forward Deployed Engineer on the team, reporting to the Senior Director of Applied AI. The team is also hiring a principal engineer to own the platform and an Applied AI…
Added 1 hour ago
ES
Principal Analog Design Engineer
Elevate Semiconductor
San Diego, CA
- $175,000 to $240,000 USD / year
As a Principal Analog Design Engineer at Elevate Semiconductor, you will provide technical leadership while remaining deeply hands-on in architecture and circuit design. You will lead the…
Added 1 hour ago
Principal Engineer, Electrical
Blue Bird Brand
Fort Valley, GA
Reporting to the Senior Director of Electrical Engineering, the Principal Design Engineer, Electrical serves as a technical authority for vehicle electrical/electronic architecture,…
Added 3 hours ago
Principal, Product Service Engineer
Alcon Vision, LLC. Company
Lake Forest, CA
…connected medical devices are designed and supported worldwide. As Principal Engineer, Product Service Engineering, you will influence product design, lead service readiness, and advance…
Added 3 hours ago
Principal Electrical & Firmware Engineer
Drucker Diagnostics
Port Matilda, PA
The Principal Electrical and Firmware Engineer leads the design, development, and support of electrical hardware, firmware, and software for Drucker Diagnostics products, from concept…
Added 6 hours ago
Principal Automation Engineer - Global Engineering
Genentech, Inc.
United States
As a Principal Automation Engineer you will be responsible for supporting large and/or complex facility/equipment improvement projects within our US manufacturing network as well as…
Added 7 hours ago
H
Project Engineer II (Geotechnical)- Chantilly, VA
Hillis-Carnes
Chantilly, VA
- $80,000 to $120,000 USD / year
…and contribute to business development initiatives. Project Engineer II is the fourth rung of the career progression ladder and is also bonus…
Added 7 hours ago
AI Principal Technical Program Manager
JPMC page
New York, NY · NY
As a Principal Technical Program Manager at JPMorganChase in Corporate- AI/ML Data Platforms team, you will lead complex, multi-functional technology projects and programs that will impact…
Added 8 hours ago
PF
Process Engineer
Perdue Farms, Inc.
Bainbridge, PA
- $89,000 to $133,000 USD / year
Optimize performance and drive continuous improvement across oilseed crushing operations. As a Crush Oilseeds Process Engineer, you will provide technical expertise to improve safety,…
Added 8 hours ago
Principal Front-End Engineer, Design Systems
Hewlett Packard Enterprise
Ft. Collins, CO
Lead quality outcomes for significant component initiatives using automated component testing, accessibility validation, and visual regression testing so product teams can adopt changes…
Added 8 hours ago
Senior Developer - Full Stack
Cydcor
Remote, United States
…Python, PostgreSQL, and AWS. We are looking for a seasoned engineer who is excellent at engineering fundamentals first and tied to no single platform second - someone who can operate across…
Added 9 hours ago
C-
Principal Software Engineer - Full Stack
CVector - Industrial AI
Remote, United States
- $150,000 to $175,000 USD / year
As a Principal Full Stack Software Engineer, you will own the technical direction of CVector’s customer-facing platform end to end - from the real-time data visualization and AI-driven…
Added 9 hours ago
Fixed Equipment Principal Engineer
Celanese International Corporation
Narrows, VA
Lead the Integrity and Reliability of Critical Manufacturing AssetsThe Fixed Equipment Principal Engineer serves as the highest-level fixed equipment technical authority at the Narrows site…
Added 10 hours ago
TF
Principal Engineer
Thrivent Financial for Lutherans
Minneapolis, MN
- $161,436 to $218,415 USD / year
As a Principal Engineer, you will help establish the engineering vision and act as the bridge between strategic intent and scalable execution in our Customized Experience Platform (CEP).…
Added 11 hours ago
Principal Quality Engineer
Twenty-Six Defense
Fort Worth, TX
The Principal Quality Engineer is an experienced-level position where the incumbent must possess an advanced level of quality engineering knowledge. Tasks at this level fall in areas where…
Added 15 hours ago
Systems Integration Lead / Process Engineer
Clear Labs
San Carlos, CA
Partner with Regulatory and Quality to ensure system and workflow changes are appropriately validated and documented for an FDA-cleared diagnostics environment.
Added 16 hours ago
Principal Electrical Engineer, Automatic Test Equipment (ATE)
Paragon Cyber Solutions
Oxnard, CA
Paragon Cyber Solutions has an immediate opening for those ready for an exciting and dynamic career as a Principal Electrical Engineer to support the Vertical Launch System (VLS) Automatic…
Added 17 hours ago
Software Development Engineer II, Efficiency & Performance, Alloy
Amazon
Seattle, WA
As a Software Development Engineer in Alloy , you will collaborate with service and infrastructure teams across Amazon to identify and eliminate performance bottlenecks in large-scale…
Added 21 hours ago
Senior Principal, Test Technician
Austin, TX · TX
Detail-oriented with attention to product quality.
Added 21 hours ago
Sr Platform Engineer
Mayo Clinic
Rochester, MN
Under the direction of the Director – Platform Technology and the Principal Platform Integration Engineer, this team member will support the direct execution and delivery of technical…
Added 21 hours ago
Principal Mixed Signal Design Engineer
Micron Technology, Inc.
Richardson, TX
Collaborate with cross-functional engineering teams to evaluate and integrate AI-enabled tools that enhance productivity, design quality, verification coverage, and time-to-market
Added 21 hours ago
Project Engineer of Foods Operations
Perdue Farms, Inc.
Washington, IN
Drive operational excellence and capital project success across foods operations as a Project Engineer. In this role, you lead capital planning and execution for harvest plants, ensuring…
Added 22 hours ago
W
(USA) Principal, Software Engineer
Walmart
SUNNYVALE, CA
- $143,000 to $286,000 USD / year
The (USA) Principal, Software Engineer leads the design and delivery of scalable platform capabilities, driving innovation in cloud-native architectures and AI/ML integration. This role…

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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