Sarah Wesolowski

• uk banking professional
• data science manager
• ml + analytics expert

I am a data science manager with a track record of leading high-impact analytics projects, delivering actionable insights, and developing technical teams. Currently, I lead a team of data scientists in balance sheet management at Yorkshire Building Society, focussing on mortgage pipeline and prepayment modelling to support pricing of mortgage products, long-term financial planning, and treasury interest rate risk management.

With 10+ years of experience, I specialise in:

• Building and deploying machine learning models (Python, R, SQL, Azure)
• Designing robust forecasting & behavioural analytics for financial and healthcare sectors
• Managing and mentoring data science teams to drive efficiency and innovation
• Communicating complex data insights to stakeholders across business functions

Previously, I worked in healthcare analytics at the University of Pennsylvania and academic research in applied statistics and Bayesian modelling. I thrive at the intersection of data, strategy, and execution by turning complex datasets into business value.