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Senior Process Simulation Engineer



Pasadena, CA, USA · Houston, TX, USA
Posted on Tuesday, January 9, 2024

Heliogen is a renewable energy technology company focused on decarbonizing industry and empowering a sustainable civilization. Powered by AI, computer vision, and robotics, Heliogen’s concentrating solar thermal solutions turn sunlight into heat, steam, power or green hydrogen fuel to help industries such as mining, cement, steel, and transportation transition to clean energy. For ambitious business and technology professionals seeking to have a meaningful impact on climate change and the health of humanity and our planet, Heliogen offers the opportunity to address global challenges through collaboration with a world-class, dynamic team of forward-thinking leaders.

About this role:

We are actively seeking a seasoned and highly proficient thermal process modeling and transient simulation expert to join our System Simulation team in the capacity of a Senior Process Simulation Engineer. In this senior role, you will be a key contributor, leveraging your extensive experience to guide and shape the design, conduct analyses, and optimizations of transient processes within our thermal systems, with a primary focus on Concentrating Solar Power (CSP) systems. Your wealth of expertise in modeling and simulating transient behavior, coupled with your deep understanding of thermal processes, will be pivotal in driving forward our organization's sustainable energy initiatives.

Location: Houston, Texas or Pasadena, California

Working arrangement: Hybrid (3 days/week in the office)

In this role, you will be tasked with:

  • Collaborating cross-functionally with simulation engineers, the process design group, and other teams to contribute to the design and optimization of CSP systems, while sharing your experience on the practical implementation of such systems.
  • Developing mathematical models of thermal systems, encompassing heat transfer mechanisms, fluid dynamics, and phase changes, utilizing advanced software and simulation tools.
  • Conducting comprehensive transient simulations to analyze the dynamic behavior of thermal systems under diverse conditions, including changing weather patterns, solar flux variations, energy demand fluctuations, state changes, and control strategies.
  • Evaluating proposed CSP systems at different design stages, analyzing efficiency, energy output, and other key metrics, and identifying opportunities for improvement.
  • Validating simulation results to ensure the accuracy and reliability of the models.
  • Preparing detailed technical reports, presentations, and documentation outlining simulation results, methodologies, and recommendations for stakeholders and management.

What's essential:

  • Bachelor’s degree in chemical or mechanical engineering, or a related field with a strong focus on thermal sciences.
  • 5+ years of process engineering experience in designing thermal or chemical systems, system simulation
  • Proven familiarity with thermal and power systems, showcasing expertise in thermal system modeling, transient simulation, and energy systems analysis.
  • Exceptional teamwork and communication skills, demonstrating the ability to collaborate effectively with cross-functional teams and contribute to a positive work environment.
  • Proficiency in using simulation software such as APROS, Aspen, Modelon-Modelica, or other relevant tools for thermal system modeling and analysis.
  • Strong proficiency in programming languages such as Python and MATLAB for implementing numerical methods and automating simulation processes.
  • Outstanding analytical and problem-solving skills, with the ability to interpret complex data and derive actionable insights from simulation results.


  • Proven experience in structuring workflows, relationship management, and interface coordination.
  • Previous work experience in Concentrating Solar Power (CSP) or other transient thermal processes is highly advantageous.
  • A history of inspiring others while fostering a culture of continuous learning and professional development.

Heliogen was created at Idealab, the leading technology incubator, and became a public company (NYSE: HLGN) in December 2021. For more information about Heliogen, please visit