As a Senior Market Analyst at LSEG, you will be part of the Derivatives team in Gdynia, providing evaluations across various OTC derivative instruments. Your primary responsibility involves managing the market data workflow to derive end-of-day evaluations. This includes sourcing exchange and contributed data, performing QA checks, maintaining the database, and participating in projects to improve market data processes. You will also provide market data expertise and support to team members evaluating client portfolios. Key tasks include monitoring market data, creating new data, resolving technical issues, and maintaining methodology documentation.