Our core offerings are designed to support the building energy modeling community.
Develop and maintain open-source tools that extend the power of EnergyPlus and streamline workflows.
Deliver workshops and learning experiences that build confidence, efficiency, and best practices in modeling with EnergyPlus and OpenStudio.
Provide hourly guidance for troubleshooting, installation, workflows, and effective use of EnergyPlus and OpenStudio.
Apply advanced modeling expertise to real-world projects, from complex systems to large-scale sector analyses.
Offer guides, references, and community-driven platforms like Unmet Hours to support continuous learning with EnergyPlus.
Founded in 2009 by Peter Ellis after his six-year career at the National Renewable Energy Laboratory in Golden, Colorado, Big Ladder Software has grown from a single-person vision into a collaborative team of programmers, engineers, and scientists. Together we bring a unique blend of expertise in software development, computer simulation, and building science. Over the years, we’ve experienced steady growth and earned recognition across the industry for our leadership and contributions
We’re always looking for passionate programmers, engineers, and scientists who share our commitment to innovation, collaboration, and advancing building energy modeling while making a lasting impact.
