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About the Role

Our CFD practice sits at the intersection of fluid dynamics, building science, and human outcomes. We are looking for a CFD Specialist who can build rigorous models, understand their implications, and communicate findings effectively to guide design engineers and clients. This role is on a small, focused team with direct impact on technically interesting building projects, working closely with HVAC design engineers and clients on projects where occupant comfort, energy performance, and health are critical.

Responsibilities

Develop and execute CFD models using the latest software to support HVAC design decisions across various building types.
Evaluate thermal comfort conditions for occupants, considering airflow, surface temperatures, radiant effects, and solar gain.
Model outdoor airflow dynamics, including exhaust re-entrainment, equipment air intake/discharge, and wind effects.
Simulate particulate and contaminant dispersion in occupied spaces, including critical environments.
Analyze thermal microclimate effects from heat rejection sources.
Partner with HVAC design engineers to understand and solve design problems.
Help engineers and clients ask better questions by providing CFD insights early in the design process.
Serve as an internal technical resource and thought partner for the engineering team.
Produce clear simulation results with actionable recommendations.
Develop presentation materials, including visualizations, reports, and executive summaries, for non-specialists.
Contribute to proposals, technical papers, and thought leadership content.

Requirements

B.S. or M.S. in Mechanical Engineering, Aerospace Engineering, Civil/Environmental Engineering, or a closely related field.
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, including turbulence modeling, mesh sensitivity, boundary conditions, and solver selection.
Hands-on experience with CFD platforms.
Strong understanding of HVAC fundamentals, including 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.
Genuinely curious and driven by interesting problems.
Clear communicator capable of explaining complex concepts to non-specialists.
Rigorous yet practical approach, understanding model limitations.
Collaborative attitude, comfortable working as a resource to others.
Professionally engaged and knowledgeable about simulation tools, building science, and HVAC developments.

Skills

CFD modeling
Building simulation
Computational fluid dynamics
Numerical methods
Turbulence modeling
Mesh sensitivity analysis
Boundary conditions
Solver selection
CFD platforms (SimScale, Flovent)
HVAC fundamentals
Heat transfer
Airflow
Psychrometrics
Hospital/healthcare design
Smoke control
Contaminant transport
Outdoor airflow analysis
Thermal comfort assessment
Data visualization
Report writing
Technical communication

Location

New York
Boston
Philadelphia

Work Type

Hybrid

Experience Level

4+ years of relevant experience

Education Level

B.S. or M.S. in Mechanical Engineering, Aerospace Engineering, Civil/Environmental Engineering, or a closely related field.
Advanced degree preferred.
PE/EIT or relevant building science credentials are a plus.

Salary/Compensations

$110,000 - $140,000

Benefits

401k employer match
Stock options
Paid time off (PTO)
Volunteer program
Employee resource groups
Training and professional development courses through JB&B University

About the Company

Founded in 1915, Jaros, Baum, & Bolles (JB&B) is an engineering firm specializing in mechanical, electrical, and plumbing (MEP) systems.
JB&B joined forces with Trinity Consultants in October 2025, operating within Trinity's Built Environment division.
The merger expands JB&B's capabilities, offering access to a broader portfolio of international projects and clients, enhanced career mobility, and interdisciplinary collaboration.
JB&B blends a rich history with forward-thinking design, including smart building systems and deep carbon reduction strategies.
The company fosters a collaborative culture with mentorship, teamwork, and continuous learning.
Offers opportunities to work on transformative projects across commercial, healthcare, aviation, life sciences, and data center sectors.

Equal Opportunity

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.