Job Description We are seeking a dedicated and motivated intern to join our team in Stockholm, Amsterdam, or Hamburg for Summer 2026, ideally starting in June. In this role, you will apply your strong technical and quantitative skills to help analyze ancillary service markets from a compliance perspective. These markets are critical for grid stability and have become increasingly profitable with the growing integration of renewable assets. A key focus will be on the imbalance price, which determines penalties or gains for energy producers when actual generation deviates from forecasts. This price is closely linked to ancillary service market metrics, making your work essential for understanding and safeguarding market integrity. Main Tasks & Responsibilities Analyze imbalance price calculation methodologies for relevant geographies by simulating variable changes, assessing sensitivities, and identifying key drivers. Detect scenarios that could indicate market manipulation. Perform exploratory data analysis using public market data and Vattenfall auction data to visualize patterns and imbalance price dynamics. Develop a ruleset proposal for identifying potential non-compliant behavior within trade surveillance systems.