Stephen Rumbelow
Fractional CMO (East of England)
- Financial Services
- Healthcare
- Professional Services
- Public Sector and Non-Profit
- Retail & E-commerce
- Technology
"I help businesses where marketing has been fragmented, reactive or simply absent, and build the commercial infrastructure that makes growth repeatable."
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Delivered a 69% increase in operating profit as Group CEO of Optimise Media, growing group revenues from £37m to £52m across a global performance marketing network.
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Exceeded a £50m revenue target at the Royal Society of Chemistry during the global pandemic, delivering £3m incremental profit uplift through a revenue diversification strategy.
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Delivered a 7.5× increase in qualified leads and 190× growth in Google organic impressions for specialist medico-legal brands, and the largest-ever sales pipeline with over 100% revenue growth year-on-year for a Cambridge biotech.
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Reset the marketing function for a founder-led financial services business, increasing website traffic by 265% within four months and generating new business wins directly attributed to the content programme.
What Stephen Rumbelow brings
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Commercial Growth Systems
Integrated marketing systems built around revenue - from positioning and go-to-market planning through to demand generation, CRM and sales enablement.
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Positioning & Value Proposition
Clear, differentiated positioning that helps technical and specialist businesses explain their offer, compete with confidence and attract the right customers.
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Regulated & Technical Market Go-To-Market
Sector-specific go-to-market expertise across biotech, MedTech, medico-legal, life sciences and financial services - markets where trust is hard-won and expertise is the product.
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AI Strategy & Governance
Senior AI leadership as Fractional CAIO - helping businesses move from fragmented experimentation to deliberate strategy, with the governance frameworks to use AI responsibly and compliantly.
Profile
Stephen brings over 20 years of senior commercial leadership, including Group CEO and Sales & Marketing Director roles, to businesses facing complex growth challenges in technical, regulated and specialist markets. As both Fractional CMO and Fractional CAIO, he combines rigorous marketing system-building with senior AI leadership: helping leadership teams clarify positioning, build integrated demand generation, and define where AI creates genuine commercial value. A CMO of the Year Finalist in both 2025 and 2026, his approach is structured, evidence-led and built around one thing – commercial results.
Ready to work with Stephen Rumbelow?