Project Engineer, HVAC Modeling Brooklyn, NY

Brightcore Energy provides end-to-end energy efficiency and clean energy measures to commercial, industrial, and institutional clients. We have the intellectual and financial capital to develop, implement, fund, operate, and maintain clean energy solutions. Our diverse solutions range from lighting, controls, geothermal heating and cooling, and other energy efficiency measures to renewable energy solutions such as solar and battery storage. We are about Building Energy Performance.

Summary/Primary
Role
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This role will help Brightcore accelerate its ability to model the advanced thermal performance of geothermal heating and cooling systems, working as part of a team across all of our modeling efforts. That includes ramping up our modeling capability for data center thermal performance, combining geothermal bore fields, dry coolers, and chillers into a single, optimized thermal system. The Thermal Modeling Engineer will help expand the range of solutions we can model and offer to customers, across both our core geothermal business and our growing data center product line.

(Management may amend or assign duties and responsibilities to this job at any time)

• Perform geothermal modeling for core business projects, including thermal performance modeling for data center applications that combine geothermal bore fields, dry coolers, and chillers.
• Develop and enhance advanced thermal models for geothermal heating and cooling systems, with a focus on system performance, efficiency, and optimization.
• Model integrated thermal systems combining geothermal bore fields, dry coolers, chillers, and other HVAC technologies.
• Support the development of thermal modeling capabilities for data center applications, including high-density and mission‑critical environments.
• Collaborate with engineering, design, and project teams to apply modeling insights to real‑world customer projects and system designs.
• Expand Brightcore’s modeling capabilities to evaluate new technologies, system configurations, and applications across the geothermal and data center markets.
• Analyze modeling results to identify opportunities to improve system performance, energy efficiency, and overall project economics.
• Help establish and improve modeling tools, methodologies, and processes to support scalable and consistent project development.
• Translate complex modeling results into clear technical recommendations for internal teams and customers.
• Build, run, and maintain models in Modelica and TRNSYS.
• Apply other geothermal‑specific modeling tools, including EED (Earth Energy Designer) and pygfunction.
• Analyze model results and modify or calibrate models accordingly.
• Write automated scripts to optimally size systems based on different customer priorities or needs.
• Simulate fluid flow for large piping systems.
• Design hydraulic piping to meet flow and pumping power requirements.
• Model different control strategies and evaluate their impact on system performance.
• All other duties and projects as assigned.

Qualifications:

• B.S. in Mechanical Engineering or related field.
• Minimum of 2 years' experience in thermal modeling.
• Strong grounding in heat transfer, fluid dynamics, and thermodynamics; comfort reasoning through equipment performance metrics (COP, EER, approach temperatures, heat transfer rates).
• Working proficiency with energy/load modeling tools (e.g., TRNSYS, Modelica, Energy Plus, eQuest, HAP, or equivalent) and Excel‑based engineering models preferred..
• Working proficiency, or ability to quickly come up to speed, with AutoCAD.
• Ability to carry ambiguous concept work — from first‑light feasibility through prototype to product requirement — to a defensible, documented result without heavy supervision.
• Fluent with AI tools.
• Direct experience with EED and/or…