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About the Role

IN2 is seeking a passionate Sustainability Engineering Intern to join our Berlin sustainability and building-physics team. This role supports the development of environmentally responsible, energy-efficient, and healthy buildings, offering practical experience on real projects.

Responsibilities

• Support sustainability assessments for new-build and refurbishment projects.
• Assist with LEED, BREEAM, DGNB, and other building-certification processes.
• Help gather, review, and organize sustainability evidence and project information.
• Support energy, carbon, daylight, comfort, and building-performance studies.
• Research materials, technologies, regulations, and sustainable-design solutions.
• Assist with sustainability reports, presentations, and client submissions.
• Coordinate information with architects, engineers, contractors, and manufacturers.
• Support the development of project-specific sustainability strategies.

Requirements

• Currently studying, or recently graduated in, Sustainability, Environmental Engineering, Architecture, Building Physics, Energy Engineering, or a related discipline.
• A strong interest in climate-conscious design and sustainable construction.
• Basic understanding of energy efficiency, carbon reduction, or environmental assessment.
• Familiarity with LEED, BREEAM, DGNB, energy modelling, or life-cycle assessment is an advantage.
• Strong research, analytical, and communication skills.
• Comfortable working in English; German language skills are an advantage.
• Organized, proactive, and comfortable working with technical documentation.
• Interested in collaborating with multidisciplinary design teams.

Skills

• LEED
• BREEAM
• DGNB
• Energy modelling
• Life-cycle assessment
• Research
• Analytical skills
• Communication skills
• Technical documentation
• Client-facing skills

Location

• Berlin

Work Type

• Full-time
• Paid internship

Experience Level

• Intern

Education Level

• Currently studying or recently graduated in Sustainability, Environmental Engineering, Architecture, Building Physics, Energy Engineering, or a related discipline.

Salary/Compensations

• Remunerated internship

Benefits

• Possibility of extending the internship or progressing into a longer-term position.
• Practical experience on live sustainability and building-performance projects.
• Support and mentoring from experienced sustainability professionals.
• Exposure to international certification systems and project sectors.
• Opportunities to develop technical, analytical, and client-facing skills.
• Friendly, international, and collaborative Berlin office.
• 24 days of annual leave per year, pro-rated for the internship period.

About the Company

• IN2 is looking for a passionate Sustainability Engineering Intern to join our Berlin sustainability and building-physics team.