Intern Energy & Sustainability

Intern Energy & Sustainability (Winter/Spring)

New York, NY, USA

Posted Monday, January 5, 2026 at 5:00 AM

At L+M Development Partners, working together to build stronger communities is our mission. Our double bottom line philosophy means that we measure success not only in financial returns but also by the positive impacts we make in the communities we serve.

Founded in 1984, L+M is a full-service real estate development firm that develops, invests, constructs, and manages properties with industry-leading innovation in a variety of urban markets nationwide, primarily in the New York Tristate Area. Recognized as one of the top affordable housing developers in the country, L+M and its affiliate companies are responsible for approximately $20 billion in development and investment, and combined have over 57,000 high-quality residential units in construction or that have been acquired, preserved, or completed.

Please visit our website for more information:  . To learn more about our mission and values, go to

L+M has a strong track record of developing affordable housing at the vanguard of energy efficient design and operation. As the Sustainability Intern, you will work directly with the Sustainability Project Manager and Senior Director of Sustainability on the operationalization of our energy and sustainability data to support ESG reporting activities; portfolio analysis; initiative development within different business lines; and other activities related to sustainability in specific development and retrofit projects.

Duties and Responsibilities:

• Support the collection of building typology and energy consumption data using Energy Star Portfolio Manager, energy audit reports, and local and federal databases.
• Conduct site visits at L+M properties as needed to collect details about building equipment, such as generators and solar panel installations, to facilitate participation in demand response activities and ongoing O&M.
• Integrate and organize data to support the onboarding of an energy data platform.
• Perform data quality checks to ensure site energy data is flowing to the correct end locations for further analysis.
• Analyze and investigate site data to ensure accuracy. Communicate with property management teams as necessary to gather additional information.
• Create and maintain internal documentation of team processes and activities.

Who We Want

This role requires a highly proactive and results-oriented individual who takes full ownership of tasks and executes them efficiently with a strong commitment to delivering high-quality work. The ideal candidate values a strong attention to detail, enjoys the relentless pursuit of information, and enjoys creating and participating in new processes.

• Proven track record of self-managing projects
• Experience navigating public transit in New York City.
• Strong interest or experience with data analysis.
• Proficient in Microsoft Office Suite, especially Excel.
• Self-starter who has a track record of being able to manage tasks independently.
• Preferred, but not required, academic background or career experience in one or more of the following topics: built environment, sustainability, renewables.

L+M offers competitive compensation and benefits and tremendous potential with a growing residential real estate developer/builder organization.

L+M is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status.

Disclaimer :
Nothing in this job description restricts management’s right to assign or reassign duties and responsibilities to this job at any time.