Stelios Tzellos
Pharmaceutical Strategy & Oncology Insights — United Kingdom
Oncology analytics, forecasting, and commercial strategy leader. PhD in Molecular Biology from Imperial College London. Experience across GlobalData, IQVIA, and AstraZeneca.
“AI can draft the forecast faster. It cannot decide whether the forecast is right. That decision still belongs to someone who has read the science, watched the market behave, and learned where the easy answer falls apart.”
— Stelios Tzellos
What Stelios Writes About
Practical perspectives on oncology forecasting, real-world evidence, market access, and the science behind pharmaceutical strategy.
Oncology Analytics
AI in forecasting, real-world evidence gaps, diagnostic adoption, market access timing, and the assumptions that quietly break pharmaceutical models.
Science Meets Strategy
How a molecular biology background shapes commercial thinking — from pipeline assessment to portfolio decisions and the discipline of separating signal from noise.
From the Blog
Writing on oncology forecasting, pharmaceutical strategy, and the science behind commercial decisions.
Connect with Stelios
Find Stelios on LinkedIn, YouTube, Medium, and more.