Join JB&B and shape the future of the built environment! Founded in 1915, Jaros, Baum, & Bolles has been a pillar of engineering innovation in New York City for over a century. Specializing in mechanical, electrical, plu…
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Thornton Tomasetti applies engineering and scientific principles to solve the world’s challenges. An independent organization of creative thinkers and innovative doers collaborating from offices worldwide, our mission is…
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$110k–$140k/yr
Full-time
bachelor degree, postgraduate degree
401k Employer Match, Stock Options, Paid Time Off (PTO), Volunteer Program, Employee Resource Groups, Training and Professional Development Courses
Posted 30d ago
Apply by Oct 4
~40 hrs/week
Responsibilities
Develop and execute complex CFD models to support HVAC design decisions, focusing on thermal comfort, contaminant dispersion, and outdoor airflow. Collaborate with design engineers and clients to translate simulation results into actionable guidance for high-performance building projects.
Requirements
Requires a B.S. or M.S. in Mechanical, Aerospace, or Civil/Environmental Engineering with 4+ years of experience in CFD modeling applied to the built environment. Must possess deep knowledge of numerical methods and HVAC fundamentals, with proficiency in CFD software platforms.
Full job description
Join JB&B and shape the future of the built environment!
Founded in 1915, Jaros, Baum, & Bolles has been a pillar of engineering innovation in New York City for over a century. Specializing in mechanical, electrical, plumbing (MEP), JB&B has contributed to some of the most iconic buildings.
In October 2025, JB&B joined forces with Trinity Consultants, a global consulting firm focused on the natural and built environments. JB&B now operates within Trinity's Built Environmentdivision, combining its deep expertise in high-performance building systems with Trinity's strengths in acoustic design, facility operations, commissioning, and technology strategy.
This strategic merger expands JB&B's capabilities and offers employees:
Access to a broader portfolio of international projects and clients
Enhanced career mobility across Trinity's global network
Interdisciplinary collaboration with experts in sustainability, environmental science, and digital infrastructure
About the Role:
Our CFD practice sits at the intersection of fluid dynamics, building science, and human outcomes: How do pathogens travel through a hospital corridor? Why is a rooftop exhaust system pulling its own exhaust back in? Is that outdoor terrace actually going to be comfortable? We're looking for a CFD Specialist who gets energized by those questions. Someone who can build a rigorous model, but who also has the instincts to know when the model is telling you something real — and the communication skills to translate that into guidance a design engineer or client can actually act on. This is a role on a small, focused team with direct impact on some of the most technically interesting building projects in the country. You'll work closely with our HVAC design engineers as an embedded technical resource, and directly with clients on projects where the stakes — occupant comfort, energy performance, and occupant health— are high.
Key Responsibilities:
Modeling & Analysis
Develop and execute CFD (computational fluid dynamics) models using the latest software and related platforms to support HVAC design decisions across a wide range of building types
Evaluate thermal comfort conditions for occupants — accounting for airflow patterns, surface temperatures, radiant effects from glazing, solar gain, and more
Model outdoor airflow dynamics: exhaust re-entrainment, equipment air intake/discharge, wind effects at building openings
Simulate particulate and contaminant dispersion — pathogens, smoke, odors — in occupied spaces including critical environments (ORs, isolation rooms, labs)
Analyze thermal microclimate effects from heat rejection sources such as heat pumps, generators, and cooling towers
Collaboration & Problem-Framing
Partner with JB&B's HVAC design engineers early in the design process to understand the real problem being solved — not just model what's handed to you
Help engineers and clients ask better questions; bring CFD insight to the table before problems become costly to fix
Serve as an internal technical resource and thought partner for the broader engineering team
Deliverables & Communication
Produce clear, well-organized simulation results with actionable recommendations
Develop presentation materials — visualizations, reports, executive summaries — that make complex fluid dynamics legible to non-specialists
Contribute to proposals, technical papers, and thought leadership content that elevates JB&B's reputation in building performance simulation
Minimum Qualifications:
B.S. or M.S. in Mechanical Engineering, Aerospace Engineering, Civil/Environmental Engineering, or a closely related field. Advanced degree preferred.
Professional licensure or certifications are not required; PE/EIT or relevant building science credentials are a plus.
4+ years of relevant experience in CFD modeling, building simulation, or computational fluid dynamics applied to HVAC or built environment applications
Deep working knowledge of numerical methods underlying CFD — turbulence modeling, mesh sensitivity, boundary conditions, solver selection
Hands-on experience with CFD platforms. Familiarity with SimScale and/or Flovent is a plus.
Strong understanding of HVAC fundamentals — not just the software, but the underlying physics of heat transfer, airflow, and psychrometrics
Experience with at least some of: hospital/healthcare design, smoke control, contaminant transport, outdoor airflow analysis, or thermal comfort assessment
Who You Are
Genuinely curious. You find the problem interesting, not just the deliverable. You push past the first answer when something doesn't look right.
A clear communicator. You can explain what a vortex is doing to an HVAC engineer who hasn't opened a fluid mechanics textbook since grad school — and you enjoy doing it.
Rigorous but practical. You understand the limits of your models and are honest about them. You know when a simpler approach is the right approach.
Collaborative. You see yourself as a resource to the engineers around you, not just a specialist in a silo. You're comfortable not always being the one who owns the project.
Professionally engaged. You follow developments in simulation tools, building science, and HVAC. You have opinions about them.
Why Work at JB&B?
Legacy + Innovation: Our company blends a rich history with forward-thinking design, including smart building systems and deep carbon reduction strategies.
Collaborative Culture: With over 400 professionals, our company fosters mentorship, teamwork, and continuous learning
Global Impact: Now part of Trinity, our company offers opportunities to work on transformative projects across commercial, healthcare, aviation, life sciences, and data center sectors
Multiple office locations: New York, Boston and Philadelphia
What We Offer
Hybrid workplace offering the flexibility to work both from home and the office
Comprehensive benefits package including 401k employer match and stock options
Paid time off (PTO), volunteer program and employee resource groups
Training and professional development courses through JB&B University
Jaros, Baum & Bolles is an equal-opportunity employer. All qualified candidates will receive consideration for employment without regard to race, ethnicity, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, marital status, military veteran status, unemployment status, or any other status protected by law.
JB&B, a Trinity Consultants team. Reimagining building systems for a smarter, more resilient future.
Industry
Professional Services
Company size
201-500 employees
Headquarters
New York, NY
LinkedIn followers
15,164
Jaros, Baum & Bolles, Inc. (JB&B) is a leading consulting engineering firm specializing in mechanical, electrical, plumbing, and fire protection (MEP/FP) systems for complex, high-performance facilities. With over 475 professionals, JB&B is headquartered in New York City and has offices in Boston and Philadelphia. Over more than a century, JB&B has designed some of the most iconic buildings across the commercial office, residential, healthcare, life science, aviation, and cultural sectors.
As part of its continued growth, JB&B recently joined the Trinity Consultants team to lead MEP engineering within their Built Environment division. Our clients can now benefit from JB&B’s legacy of engineering combined with Trinity’s broader multidisciplinary expertise across Built Environment, Life Sciences, Environmental Consulting, and Water & Ecology. Within the Built Environment, our services include acoustics, audiovisual, IT, security consulting, site assessments, vibration monitoring, commissioning, building operations, building energy efficiency, and building management software—bringing together specialized capabilities that support projects from concept through completion.
Offices: 55 Water Street, 38th Floor, New York, NY 10041, US · 2 Liberty Square, 3rd Floor, Boston, MA 02109, US · 1700 Market Street, Suite 3112, Philadelphia, PA 19103, US
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