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Sustainability Intern

Opdenergy • Spain • Added on Jul 9, 2026
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This internship offers a foundational role in the corporate sustainability department of a global renewable energy player. You will spend your days collecting and validating environmental data across various business units to support the company’s non-financial reporting. From assisting with carbon footprint calculations to maintaining ISO standards, this position involves high-level administrative accuracy and the creation of internal communications to keep the workforce engaged with ESG targets.

While Opdenergy produces the clean energy the world needs, this role ensures the company’s internal operations remain as sustainable as its product. You will help bridge the gap between technical renewable development and transparent accountability, ensuring that growth is measured against rigorous ESG frameworks and decarbonization goals. It is a rare chance to see how a mid-sized IPP navigates the evolving landscape of European energy regulations.

This suits someone who is a detail-oriented Master’s student with a passion for data and a desire to build a career in renewable energy management.

Job-FAQs

What are the main missions and responsibilities of this role?

As a Sustainability Intern, your primary mission is to facilitate the ESG reporting cycle by gathering qualitative and quantitative indicators from various departments. You will play a supporting role in drafting the annual sustainability report and maintaining the integrity of the company's Integrated Management System under ISO 9001 and 14001 standards. Your day-to-day will involve technical tasks like assisting in the calculation of the carbon footprint and administrative tasks such as formatting corporate presentations. You will also keep a close eye on the market by monitoring competitor performance and emerging ESG regulations to ensure the team remains ahead of industry standards.

Key learning opportunities for this job

This role provides a deep dive into the technicalities of ESG metrics within the renewable energy sector. You will learn how to apply international reporting standards and get hands-on experience with carbon accounting methodologies, which are highly sought-after skills in the current job market. Beyond data, you will gain exposure to corporate compliance and management systems. Working in a multicultural environment across Spain, Europe, and the Americas will also sharpen your ability to communicate complex sustainability concepts to diverse internal stakeholders.

How does the ideal candidate look like (experience, skills)?

The ideal candidate is currently enrolled in or recently finished a Master's degree in a field like Environmental Sciences, Engineering, or Biology. Proficiency in Microsoft Excel and PowerPoint is essential, as much of the role involves data manipulation and creating professional visual reports for executive review. You should possess a proactive, 'hands-on' attitude and the ability to work independently on research tasks. Since the role involves internal communications and reporting, excellent written and verbal communication skills in both English and Spanish are typically expected in a Madrid-based global office.

Advice to stand out and make a successful application

To stand out, demonstrate a clear understanding of the Renewable Energy Directive and how ESG reporting is evolving for Independent Power Producers (IPPs). Mentioning your familiarity with ISO standards or specific carbon footprinting protocols in your cover letter will show you can hit the ground running. Since this is an internship, highlight any academic projects or previous work where you had to manage large datasets or coordinate information between different groups. Show Opdenergy that you are not just interested in sustainability in general, but specifically in the operational transparency of energy transition companies.

What aspects of the company's sustainability is this role likely to focus on?

The role focuses heavily on transparency and accountability. While the company’s core business is renewable energy, this position ensures that the 'how' of their operation is documented through ESG reporting and decarbonization tracking. You will likely contribute to projects involving scope 1, 2, and 3 emissions and the continuous improvement of environmental management protocols. This ensures the company’s rapid growth across the US and Europe remains aligned with the highest sustainability benchmarks.

What are the main challenges someone in this role might face?

The most significant challenge will be data siloing; you may find it difficult to extract timely and accurate ESG indicators from busy departments across different regions. Learning to follow up effectively without being intrusive is a key soft skill you will need to develop. Additionally, the fast-paced nature of a company with a 17 GW pipeline means priorities can shift quickly. Staying organized while managing multiple reporting deadlines and administrative tasks will require strong time-management skills.

How could a typical day look like for someone in this position?

A typical day might start with a morning check-in to track the progress of data requests for the latest sustainability report. You might spend a few hours analyzing energy consumption data or researching new ESG regulations that affect the Spanish or international markets. In the afternoon, you could transition to a more creative task, such as designing a PowerPoint presentation for an internal training session or drafting a newsletter highlighting the department’s latest successes. The day often ends with administrative updates to the ISO management folders to ensure audit readiness.

What are the opportunities for professional growth and development in this role?

Opdenergy is in a phase of significant international expansion, which creates a dynamic environment for career entry. Successful interns who demonstrate high analytical capability and initiative often find themselves well-positioned for junior analyst roles within the same department. The cross-functional nature of sustainability work here means you will develop a broad network across finance, operations, and development, potentially opening doors to various career paths within the renewable energy sector.

The main stakeholders you might be interacting with

You will primarily interact with the Global Sustainability Team and the EHS managers in Madrid. However, your role will require you to reach out to department heads in finance, human resources, and project operations to collect essential ESG data. External interactions might include communicating with environmental consultants or third-party auditors during ISO certification renewals. You may also collaborate with the communications team to ensure that the sustainability messaging is accurately reflected in public-facing materials.

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