Senior CFD Engineer

2 weeks ago

Washington, Washington, D.C., United States Last Energy Full time

Last Energy is building productized nuclear plants with manufacturing-style repeatability. We're hiring a CFD Engineer focused on heat exchangers to drive thermal-fluid analysis from first-pass sizing through detailed geometry decisions. You'll own the CFD workflow end-to-end and turn simulations into clear trade studies and recommendations that directly inform hardware design (ΔP, effectiveness, flow distribution, hot spots), while continuously improving the speed and consistency of how we model and communicate results.

Key Duties & Responsibilities
  • Build and run CFD models for heat exchanger components and flow paths (headers/manifolds, distributors, tube/fin passages, shell-side features, compact HX geometries, etc.)
  • Drive pressure drop and heat transfer performance predictions and trade studies (ΔP vs UA/effectiveness, temperature approach, flow distribution, hot spots)
  • Develop a repeatable CFD workflow: geometry → mesh → solve → post-process → standardized report package
  • Execute parametric sweeps and sensitivity analyses to support rapid iteration and design decisions
  • Improve throughput by reducing model failure modes and cycle time through automation, templates, and best practices
  • Translate CFD outputs into actionable design changes in collaboration with mechanical design and systems engineering
  • Create or refine engineering correlations / reduced-order models (Nu, f, HTC) to feed sizing and system tools where appropriate
  • Support vendor and partner alignment by clearly defining assumptions, boundary conditions, acceptance criteria, and evidence packages
Qualifications
  • B.S. in Mechanical, Aerospace, or a related engineering field (M.S./PhD a plus)
  • Strong fundamentals in heat transfer and fluid mechanics; comfort reasoning from first principles and sanity-checking results
  • 4+ years of hands-on CFD experience in thermal-fluids applications (more experience welcomed; we can level this role)
  • Experience with heat exchangers or closely related mass/heat transfer hardware (compact HX, manifolds, internal flows, finned passages, etc.)
  • Proficiency in at least one major CFD solver: ANSYS Fluent/CFX, STAR-CCM+, OpenFOAM, or COMSOL
  • Practical meshing and modeling judgment: boundary layers, y+, turbulence model selection, convergence criteria, grid independence
  • Ability to communicate results clearly to non-CFD stakeholders and defend assumptions under schedule pressure
  • Multi-phase or boiling/condensing modeling experience is a plus
  • Experience with flow distribution challenges and mitigation (distributors, baffles, headers) is a plus
  • Experience with flow-induced vibration considerations or coupling CFD insights to structural risk is a plus
  • Python-based automation of meshing/runs/post-processing; comfort on HPC environments (Slurm/PBS) is a plus
  • Experience producing decision-grade analysis packages in high-reliability industries is a plus

  • Associate Electrical Engineer

    1 day ago

    Washington, Washington, D.C., United States SimpleRPO Full time

    As an Associate Electrical Engineer, you will have the opportunity to apply your technical knowledge of building services systems across a portfolio of ground-breaking projects in the US and globally. Strong communication skills and teamwork are essential and in turn, we can offer you unrivalled career, project, and development opportunities.What would you...

  • Senior Electrical Engineer

    2 weeks ago

    Washington, Washington, D.C., United States Microsoft Full time

    Microsoft's Cloud Operations & Innovation (CO+I) is the engine that powers our cloud services. The CO+I CTO Office's Energy Technology team is looking for a Senior Electrical Engineer - Energy Systems. This individual will be expected to be knowledgeable of energy technology alternatives developing across the energy system to support reliability,...

  • Senior Sales Engineer

    2 weeks ago

    Washington, Washington, D.C., United States Spire Full time $120,000 - $180,000 per year

    What You'll Do: As a Senior Sales Engineer focused on our Space Services offering, you will join a growing team responsible for providing unique space-based solutions to the commercial market. You will engage directly with the Spire Account Executives and customer base to understand operational requirements, qualify opportunities, and design space-driven...

  • Senior Civil Engineer

    3 days ago

    Washington, Washington, D.C., United States IMEG Full time $109,000 - $159,000

    Are you Ready to Engineer Your Career?  At IMEG, one of the largest design consulting firms in the U.S., we strive to provide exciting and rewarding career opportunities to our team members. We work hard and are passionate about what we do but also love to have fun along the way. We celebrate the ability to be a firm of over 2900 employees in the US and...

  • Senior Engineer

    1 day ago

    Washington, Washington, D.C., United States Ryde Technologies Full time

    We are seeking a Engineer, Senior to support the US Air Force in Washington DC. This position supports engineering matters for AQR with responsibilities for planning, programming, and budgeting efforts for the Air Force Science and Technology (S&T) portfolio, as well as the Air Force experimentation, prototyping, development planning, and technology...

  • Senior Network Engineer

    1 week ago

    Washington, Washington, D.C., United States Galapagos Federal Systems Full time

    Job SummaryGalapagos Federal Systems, LLC is seeking a highly motivated and technically proficient Senior Network Engineer to join our dynamic and mission-driven team. The ideal candidate will possess extensive, hands-on experience with cloud technologies, service-oriented architectures, and hybrid network solutions deployed across geographically dispersed...

  • Senior HRBP Manager, Engineering

    1 day ago

    Washington, Washington, D.C., United States Jobgether Full time

    This position is posted by Jobgether on behalf of a partner company. We are currently looking for a Senior HRBP Manager, Engineering in Washington.This role partners closely with senior engineering leaders to drive strategic HR initiatives that strengthen organizational capabilities, enhance ways-of-working, and support a high-performing, inclusive culture....

  • Senior Platform Engineer

    23 hours ago

    Washington, Washington, D.C., United States ExecutivePlacements Full time

    Senior Platform Engineer The Associate Experience Technology team connects users in the Capital One enterprise with simple to use, digitally enriched experiences that are designed to maximize associate productivity. Our teams uncover old, archaic processes and identify Associate pain-points caused by outdated technology - and then we design, develop, and...

  • Senior Systems Engineer

    3 days ago

    Washington, Washington, D.C., United States Gigantes Group Full time

    Senior Systems Engineering Specialist – Aviation TechnologyLocation: Washington, D.C.Industry: Aviation | Technology Systems | Engineering DesignA well-established engineering consulting firm is seeking a Senior Systems Engineering Specialist to support complex aviation infrastructure projects. This role involves the design and coordination of specialized...

  • Senior Civil Engineer

    3 days ago

    Washington, Washington, D.C., United States IMEG Full time $112,000 - $163,000

    Are you Ready to Engineer Your Career?  At IMEG, one of the largest design consulting firms in the U.S., we strive to provide exciting and rewarding career opportunities to our team members. We work hard and are passionate about what we do but also love to have fun along the way. We celebrate the ability to be a firm of over 2900 employees in the US and...