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Our mission is to make the world a safer, more secure and sustainable place.
The Role
Perform CFD-based fire and explosion simulations (FLACS, FDS) for ESS/BESS scenarios, analyze thermal, overpressure, and gas dispersion outputs, support performance-based safety design and V&V, prepare technical reports, and collaborate with multidisciplinary teams while developing expertise under senior guidance.
Summary Generated by Built In
RESPONSIBILITIES
QUALIFICATIONS
- Develop and execute CFD-based fire and explosion simulations using:
- FLACS for gas dispersion, flame acceleration, and vented/unvented deflagration analysis
- FDS for gas dispersion, fire dynamics, smoke movement, heat transfer, and plume behavior
- Model ESS/BESS fire and explosion scenarios, including:
- Battery off-gas release and dispersion
- Ignition and overpressure development
- Large-scale enclosure and outdoor fire scenarios
- Apply strong fundamentals in heat transfer (convection, conduction, radiation), fluid flow and turbulence, combustion, and fire dynamics
- Analyze simulation outputs such as:
- Temperature fields, heat fluxes, and thermal exposure
- Overpressure and impulse
- Gas concentration and visibility
- Support performance-based fire and explosion safety design (PBD) aligned with applicable codes and standards
- Interpret simulation results in the context of code intent, safety objectives, and risk reduction strategies
- Assist in defining credible worst-case and design fire/explosion scenarios
- Perform pre-processing, solver execution, and post-processing of CFD simulations
- Support verification and validation (V&V) through comparison with:
- Large-scale ESS fire test data
- Literature and experimental benchmarks
- Prepare clear, defensible technical reports for internal review and external customers
- Work under guidance of senior fire and explosion engineers while progressively taking ownership of tasks
- Collaborate with multidisciplinary teams across CFD, testing, certification, and research
- Maintain high-quality documentation and adherence to established modeling workflows
- Actively develop expertise by reviewing technical literature and internal best practices
QUALIFICATIONS
- Bachelor's or Master's degree in Mechanical Engineering / Chemical Engineering/ Thermal Sciences/ Combustion, Fire Protection Engineering, or CFD-related disciplines
- 2-4 years of experience in CFD, thermal-fluid simulation, fire modeling, or related applied simulation work
- Hands-on experience or project exposure to:
- Fire Dynamics Simulator (FDS) and
- FLACS or similar explosion / gas dispersion tools
- Computer Aided Design (CAD) software (e.g. Inventor, SolidWorks)
- Ability to apply engineering judgment and first principles when building simulation models
- Excellent technical writing and verbal communication skills
- Comfortable working independently on defined tasks within a structured engineering framework
- Exposure to battery energy storage systems (BESS/ESS) or lithium-ion thermal runaway (nice to have)
- Familiarity with large-scale fire testing or fire test data interpretation (nice to have)
- Awareness of performance-based fire engineering concepts (nice to have)
- Basic knowledge of relevant standards (e.g., NFPA 855, NFPA 68/69, IFC, international fire codes) (nice to have)
- Experience with other CFD tools (ANSYS Fluent, OpenFOAM, CFX)
- Experience with Python workflow automation (nice to have)
- Interest in research, model validation, and advanced simulation methodologies
Skills Required
- Bachelor's or Master's in Mechanical, Chemical, Thermal Sciences, Combustion, Fire Protection Engineering, or CFD-related discipline
- 2-4 years experience in CFD, thermal-fluid simulation, fire modeling, or applied simulation work
- Hands-on experience or project exposure to Fire Dynamics Simulator (FDS)
- Hands-on experience or project exposure to FLACS or similar explosion/gas dispersion tools
- Experience with CAD software (Inventor, SolidWorks)
- Ability to apply engineering judgment and first principles when building simulation models
- Excellent technical writing and verbal communication skills
- Comfortable working independently on defined tasks within a structured engineering framework
- Experience with other CFD tools (ANSYS Fluent, OpenFOAM, CFX)
- Exposure to battery energy storage systems (BESS/ESS) or lithium-ion thermal runaway
- Familiarity with large-scale fire testing or fire test data interpretation
- Awareness of performance-based fire engineering concepts
- Basic knowledge of relevant standards (e.g., NFPA 855, NFPA 68/69, IFC, international fire codes)
- Experience with Python workflow automation
- Interest in research, model validation, and advanced simulation methodologies
What the Team is Saying
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UL Solutions Compensation & Benefits Highlights
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Retirement Support — The 401(k) program is portrayed as strong, with a notable employer match and an additional company contribution after the first year that enhances long‑term savings. This structure is consistently highlighted as a differentiator in the total rewards mix.
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Healthcare Strength — Medical coverage is characterized by multiple plan options administered by a major carrier and a substantial employer cost share, alongside dental, vision, and mental‑health/EAP resources. The breadth of choices and supportive programs underscore a comprehensive health offering.
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Leave & Time Off Breadth — PTO with sick time, floating holidays, and dedicated paid volunteer days are emphasized, along with paid parental bonding and family‑care leave. Flexible work arrangements by role further increase the practical utility of time‑off benefits.
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The Company
What We Do
A global leader in applied safety science, UL Solutions transforms safety, security and sustainability challenges into opportunities for customers in more than 100 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 Certification Marks serve as a recognized symbol of trust in our customers’ products and reflect 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.
Why Work With Us
Science is in our DNA; we are endlessly curious and passionate about seeking and speaking the truth. We take delight in knowing that our work makes a meaningful contribution to society, and we are proud that our culture is centered on integrity, collaboration, inclusion and excellence.
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UL Solutions Offices
Hybrid Workspace
Employees engage in a combination of remote and on-site work.
Depending on the role we offer hybrid or remote opportunities.
Typical time on-site:
Flexible
