Melissa Simpson
Lead Analytics Engineer
London, United Kingdom
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Mel Simpson is a Lead Analytics Engineer at Virgin Media O2, with over 10 years of experience turning complex data problems into scalable solutions. She’s worked extensively with DBT, GCP, Git, and Snowflake, and has hands-on experience across a range of data modelling methodologies.
She enjoys getting into the details of optimisation, improving workflows, and designing solutions that actually scale in large, real-world environments. More recently, along with her team, Mel has been exploring DBT Fusion at VMO2, helping drive faster, more efficient ways of building and validating data at scale.
She's particularly interested in how AI and more agentic ways of working will reshape Analytics Engineering - and always keen to experiment with what’s next.
Area of Expertise
Topics
The Fusion Effect
We're one of the UK's largest telecommunications companies, supporting 42 million customers, 300 DBT users, 100 DBT projects and spending millions of dollars on compute annually in a single-tenant environment. At this scale, inefficiency isn't a nuisance…it's a cost.
In this session, we'll demonstrate how DBT Fusion cut wait times, reduced spend and broke reliance on CI/CD. With state-aware orchestration, instant SQL validation and column-level lineage, we've transformed how we build and ship data. We'll show how implementing Static Analysis raised quality, consistency, and trust.
Crucially, we'll demonstrate the before-and-after as we quantify the measurable gains achieved with DBT Fusion in terms of cost and speed.
We'll share the setup, challenges, wins and finally - explore what's next for us, whether thats AI, DBT skills and agentic workflows.
This is about more than tooling, it's about unlocking speed and intelligence at scale.
dbt Summit 2026 Sessionize Event
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