Building Physics Engineer

Shape the future of sustainable buildings with re:sustain

Role overview:

Embedded in science and fuelled by a passion for tangible change, we're a rapidly growing team at the forefront of building analytics, dedicated to rewriting the story of energy consumption and carbon reduction in commercial real estate. We leverage cutting-edge BMS data streaming solutions interfaced with our proprietary calibrated digital twin technology to empower clients to manage their facilities with unparalleled efficiency and drive significant carbon reduction.

This is a brand-new role in our scaling impact technology business. We are seeking a highly skilled and detail-oriented Building Physics Engineer to take a pivotal role in developing, calibrating, and maintaining the energy models that power our digital twin platform. Your work will be instrumental in ensuring our virtual models accurately reflect real-world energy performance and building behaviour. If you're a curious and driven engineer with a solid grasp of building physics, thermodynamics, and systems modelling, and you're ready to apply that knowledge to a unique digital twin platform that's already making a tangible impact, this role is a genuine opportunity to step up and make your mark.

What you'll do - your impact:

As a Building Physics Engineer at re:sustain, you will be instrumental in ensuring our virtual models are precise, dynamic reflections of real-world building behaviour. You'll be empowered to:

Digital Twin development:

• Create and maintain sophisticated dynamic energy models of commercial buildings, meticulously incorporating HVAC systems, envelope properties, occupancy patterns, and internal loads.
• Develop detailed geometry for energy models.
• Construct comprehensive energy models, including intricate HVAC systems (training on our advanced in-house tools will be provided).

Drive accuracy through data-driven calibration:

• Utilise real-time and historical building performance data, including metered data and utility bills, to meticulously calibrate digital twin models, ensuring exceptional accuracy.
• Conduct thorough analysis of utility bills and metered data to inform model refinement.

Unlock performance insights & optimisation strategies:

• Simulate diverse operational strategies (e.g., HVAC schedules, retrofit scenarios) to accurately predict energy, carbon, and comfort outcomes.
• Run multiple scenarios through the energy model to identify and quantify potential savings.
• Analyse building control patterns to identify inefficiencies and opportunities for optimisation.
• Partner with clients to translate complex model outputs and energy data into clear, actionable strategies, empowering them to achieve their sustainability goals and enhance operational efficiency.

Champion service excellence & continuous improvement:

• Regularly monitor streamed BMS data, proactively responding to alerts and ensuring optimal system performance.
• Oversee the quarterly recommissioning of controls to maintain peak efficiency.
• Maintain a meticulous audit trail of all control interactions.
• Collect and manage monthly/quarterly metered data readings and utility bills.

Commitment to technical learning, collaboration & knowledge contribution:

• Remain at the forefront of advances in digital twin frameworks, building simulation tools, and energy modelling standards (e.g., ASHRAE, CIBSE).
• Collaborate closely with building engineers, software developers, and sustainability consultants to interpret model results, refine our platform, and continuously improve asset performance for our clients.
• Contribute to internal knowledge sharing, potentially including training colleagues on energy modelling best practices.

Who you are - your expertise:

We're looking for a proactive, analytical, and solutions-oriented engineer who is excited by the prospect of working with advanced technology to deliver tangible sustainability outcomes.

Essential:

• A Bachelor's or Master's degree in Mechanical Engineering, Building Physics, Architectural Engineering, Sustainable Design, or a closely related field.
• 2-3+ years of dedicated experience in dynamic building energy modelling, with hands-on proficiency using leading simulation tools.
• A strong fundamental grasp of thermodynamics, heat transfer, fluid dynamics, and the operational principles of diverse HVAC systems.
• Experience working with building automation systems (BMS), IoT sensor data, or time-series energy data.
• Proven ability to analyse building performance data and diagnose system inefficiencies.
• Excellent problem-solving skills and meticulous attention to detail.
• Strong communication and interpersonal skills, comfortable liaising with technical and non-technical stakeholders, including clients.
• Proficient user of Microsoft Excel for data analysis.
• A genuine passion for sustainability and making a positive environmental impact.

Desirable (these skills are a bonus, and we're passionate about your growth and learning on the journey with us!):

• Proficiency in Python or MATLAB for scripting, data analysis, or model integration.
• Direct experience with the installation, configuration, or commissioning of BMS systems and familiarity with protocols like BACnet, Modbus, or LON.
• Knowledge of specific BMS platforms (e.g., Honeywell, Schneider, Siemens, Tridium Niagara).
• Familiarity with cloud platforms and data analytics tools.
• Experience with digital twin concepts or platforms.
• Relevant professional certifications or licensures (e.g., CEng, CEM, BEMP, BCIA qualifications).
• Additional language skills

Why re:sustain - what we offer:

This isn't just another role; it's a chance to be at the heart of a company where your work has purpose, your ideas are valued, and your growth is paramount.

• Make a tangible impact: Join a mission-driven company where your work directly contributes to reducing carbon emissions and creating more sustainable commercial buildings.
• Innovate and grow: Be part of an innovative and fast-growing PropTech business at the cutting edge of digital twin technology. As this is a brand-new role, you have an unparalleled opportunity to not only define your impact but also to sculpt your career trajectory within a rapidly scaling business.
• Collaborative & supportive culture: Join a dynamic, supportive, and close-knit team where collaboration, open knowledge sharing, and mutual respect are foundational. We celebrate curiosity and empower you to make your voice heard.
• Professional development: We are committed to your growth, offering opportunities for ongoing learning, training (including on our bespoke tools), and professional development.
• Flexible work environment: Enjoy the benefits of a remote-first role with flexibility, balanced with valuable in-person team collaboration.
• Competitive rewards: Receive a competitive salary, a discretionary company bonus, and a comprehensive benefits package.

To apply:

Ready to make an impact? We're excited to learn more about you. Please submit your CV and a covering letter, detailing your relevant experience and how you envision contributing to re:sustain's mission, to .