Senior HVAC 1D Systems Modeling & Simulation Engineer

Daikin Applied Ltd.; Plymouth, Northern (MN, KY); Hybrid; USD 90,000 - 152,000; Full time

Benefits offered by this job

Medical insurance options

Dental insurance

Vision insurance

401K retirement plan with employer  |

Paid time off

Paid holidays

Paid sick time

Tuition Reimbursement

Work visa sponsorship not available

Job summary

Daikin Applied, the world’s leading HVAC company, is seeking a Senior Development Engineer III to develop and calibrate 1D system models for commercial HVAC products in Plymouth, MN. Hybrid work model.

You will build reusable libraries, automate model generation, and support MiL testing across chillers, air handlers, and terminal systems. The role combines steady-state and dynamic modeling with simulation tool development, data-driven calibration, and AI/ML integration to accelerate product

Qualifications

• Bachelor’s degree in Mechanical Engineering or a related technical field.
• 6+ years of relevant experience (or equivalent: MS with 4+ years; PhD with relevant modeling or tool development experience).
• Strong understanding of thermodynamic cycle modeling, HVAC&R systems, heat transfer fundamentals, and both steady-state and dynamic system behavior.
• Proficiency in Julia, Python, MATLAB, or R, with demonstrated experience developing tools, libraries, or simulation software.
• Experience with standard system simulation tools such as Dymola (preferred), GT Suite, Simscape, or Amesim, and familiarity with FMI standard.
• Experience building and executing structured simulation workflows, including model integration with Simulink and FMI/FMU-based tools.
• Familiarity with steady-state modeling platforms such as VapCyc, CoilDesigner, EES, or equivalent tools.
• Experience designing model libraries, parameter databases, and calibration routines, and troubleshooting complex models.
• Effective communication and presentation skills, with the ability to convey technical concepts to both technical and non-technical audiences.
• Strong problem-solving and analytical skills, with the ability to estimate work tasks and support project planning activities.
• Demonstrated ability to work independently and collaboratively in a cross-functional, globally distributed environment.

Responsibilities

• Develop, calibrate, and validate both steady-state and physics-based dynamic models of HVAC systems, including compressors, heat exchangers, expansion devices, and control logic.
• Design and implement libraries and development frameworks for steady-state and dynamic system simulation with emphasis on reusability, modularity, and integration.
• Build tools that automate model generation, parameterization, calibration, and results processing for thermodynamic system simulations.
• Interface Modelica models with Simulink, Python, and testing frameworks via FMI/FMU to support model-in-the-loop (MiL) workflows.
• Collaborate with global MBE teams to define simulation requirements and standardize toolsets, workflows, and modeling libraries across business units.
• Support the new product development phase-gate process for design maturity across milestones.
• Champion model standardization, documentation, traceability, and lifecycle governance practices.
• Develop test plans and support component, subsystem, and system testing to validate simulation models.
• Investigate and apply ML/AI tools to accelerate calibration, surrogate modeling, controller tuning, or automation of modeling workflows.
• Provide guidance on best practices for simulation tool development, version control, and CI, and mentor junior engineers.

Skills

Programming

Thermodynamics

Modeling & Simulation

Communication skills

Education

Bachelor's degree in Mechanical Engineering or related field

Master's or Ph.D. in Mechanical Engineering or related field

Tools

Python

Julia

MATLAB

R

Dymola

Simscape

GT Suite

Amesim

FMI/FMU

VapCyc

CoilDesigner

EES

Git

Job description

Daikin Applied, the world’s leading HVAC company, is seeking a Senior Development Engineer III to develop and calibrate 1D system models for commercial HVAC products in Plymouth, MN. Hybrid work model.

You will build reusable libraries, automate model generation, and support MiL testing across chillers, air handlers, and terminal systems. The role combines steady-state and dynamic modeling with simulation tool development, data-driven calibration, and AI/ML integration to accelerate product