Principal Sustainability Engineer

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Longevity Partners is a multidisciplinary energy and sustainability consulting firm, established in 2015 to accelerate the global transition to a low-carbon economy. We are a global advisory firm with clients in over 40 countries, served by offices in London, Paris, Amsterdam, Munich, Milan, New York, Seattle, Austin, and Tokyo.

Our clients include some of the world's largest real estate developers, owners, investors, and occupiers, spanning all sectors of the commercial property industry. We support our clients with services ranging from strategy development to Net Zero carbon planning and climate risk mitigation. Drawing on our expertise in the UK and European markets, we partner with clients across the US to navigate complex regulatory environments and to implement strategies that mitigate risk and drive long-term value.

Key Responsibilities

• As a Principal Engineer, you will play a senior leadership role in expanding and delivering Longevity's technical services in the US market, with a specific emphasis on energy auditing & compliance, certification, and advanced building performance strategies.
• Lead and manage delivery of energy audits, including building emissions assessments, energy efficiency retrofits, and emissions intensity benchmarking.
• Oversee technical delivery of complex sustainability and decarbonisation projects, ensuring high-quality, timely results that meet regulatory and client requirements.
• Build and maintain strong client relationships, serving as the trusted technical advisor on energy and emissions compliance, net zero roadmaps, and sustainability initiatives.
• Collaborate with internal and external stakeholders to deliver Energy Audits (ASHRAE Level I, II, and III), Retro-Commissioning (RCx), and other services aligned with LL87 and LL97 requirements.
• Guide clients through navigating regulations, emissions limits, and available incentive programs.
• Support business development efforts by contributing technical expertise to proposals and presentations, particularly for retrofit, carbon management, and net zero opportunities.
• Lead and mentor a team of engineers and analysts, fostering technical excellence and professional growth.
• Represent Longevity Partners at industry forums, events, and working groups, particularly those focused on compliance and decarbonisation in the US real estate market.
• Contribute to strategic planning for US service lines, including innovation in carbon analytics, energy modelling, and sustainability reporting.

Essential Skills and Experience

Technical Expertise

Regulatory and Compliance Knowledge

Professional Credentials

Leadership and Communication

Preferred Attributes

Why Join Us

At Longevity Partners, you will be part of a dynamic, purpose-driven organisation committed to enabling a net zero future. This is an opportunity to work at the forefront of regulatory compliance and sustainability innovation in one of the most progressive real estate markets in the world.

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