Portfolio Analyst Intern

Location

Madrid, Spain

About Us

Zelestra is a client-focused, multi‑technology, global renewable energy company, committed to doing things the right way.

Our purpose is clear: to change the world by making decarbonization a reality for our partners. 

We are a vertically integrated company, specialized in the development, commercialization, construction, and operation of large‑scale renewable energy projects (solar, bess, ...)

Zelestra is backed by more than two decades of experience, and with a strong presence in key growth markets across the U.S. and Europe and supported by EQT, one of the world’s leading investment funds, with €270 billion in total assets under management.

Mission

During the internship, you will join the Portfolio Management team with a strong learning-oriented approach, actively participating in project analysis and monitoring, reporting activities, and process improvement, while developing analytical, digital, and communication skills in an international business environment.

Responsibilities

What will you learn during the internship?

• Project portfolio management and analysis: You will collaborate with the Business Units in monitoring the portfolio of projects under development, learning how to analyze project progress, milestones, and key performance indicators (KPIs).
• Reporting and data analysis: You will participate in reporting processes, ensuring data quality and consistency, and supporting the preparation of monthly executive-level presentations for senior stakeholders.
• Automation and digital tools (AI): You will participate in the rollout of internal Artificial Intelligence solutions (logic definition and model accuracy improvement).
• Basic financial processes: You will participate in the budgeting process and monthly forecasting activities, gaining practical insight into project financial management.
• Data and process management: You will actively collaborate with the Business Units to learn how to develop, test, document, and implement robust data collection and data management processes.
• Continuous improvement and process transformation: You will participate in system implementation and process improvement projects, developing a mindset focused on efficiency and innovation.
• Teamwork and professional communication: You will collaborate with multidisciplinary teams and build a network of internal and external contacts, learning to communicate information clearly, in a structured way, and adapted to different levels of the organization.

Skills and competencies you will develop:
•    Data analysis and critical thinking
•    KPI management and executive reporting
•    Use of digital tools and AI applied to business
•    Organization, attention to detail, and process orientation
•    Professional communication and collaborative teamwork

Job Requirements

• Business Administration degree, Business analytics degree or similar.
• English (C1 - C2  written and spoken).
• Interest in the renewable energy sector and the challenges associated with the development, construction and operation of a renewable energy plant.
• Ability to sign an Internship Agreement with your University/Training Center (mandatory requirement).
• On-site format: Madrid office (Paseo de Recoletos, 37–41, 1ºA).
• Start date: From June 2026, with the earliest possible start.
• Duration: Ideally one full academic year or 1 year.
• Working hours: Ideally, full-time except during academic periods.
• Paid internship.

Zelestra celebrates the diversity of thought and experience that comes from a variety of backgrounds including, among others, gender, age, ethnicity... Our mission is to contribute to a fairer and more equitable society.

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JR 3074

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What we offer