Stephen Rumbelow

My expertise

I bring over 20 years of global sales and marketing leadership experience, helping organisations deliver measurable, commercially aligned growth by:

• Aligning marketing strategy to revenue, profit and long-term business objectives

• Establishing clear positioning and differentiated value propositions

• Designing structured, prioritised go-to-market plans that maximise return on investment

• Building sustainable demand pipelines through targeted, evidence-led campaigns

• Applying AI and digital tools pragmatically to improve efficiency and performance

My competitive edge

Commercial Leadership with Structured Delivery

I specialise in bringing clarity and discipline to complex growth challenges. With over 15 years operating at C-suite level, including as Group CEO and Sales & Marketing Director, I combine strategic direction with hands-on delivery to build marketing systems that drive sustainable commercial performance.

About me

As a Global Sales & Marketing Leader, I have worked across regulated, advisory and growth-focused sectors, from SMEs to international organisations.

As Group CEO of Optimise Media, I delivered a 69% increase in operating profit, led international expansion into the Middle East and Asia, and strengthened commercial discipline across multi-regional teams.

As Sales & Marketing Director at the Royal Society of Chemistry, I exceeded a £50m revenue target despite the global pandemic, delivering £3m incremental profit uplift through a revenue diversification strategy I was appointed to lead.

More recently, I have supported growth-stage and professional services organisations through fractional mandates.

At Isogenica (biotech), I repositioned the business to deliver its largest-ever sales pipeline and over 100% revenue growth, achieving a 10/10 client NPS.

For Sona Insurance, a commercial insurance broker, I delivered a full marketing reset, increasing traffic by 265% within four months and establishing a repeatable inbound engine aligned to commercial priorities.

Across two medico-legal expert practices (Pain Expert and Psychiatric Expert), I led a strategic repositioning programme that more than doubled combined website traffic and delivered a 7.5× increase in qualified leads year-on-year within the first month post-launch.

I focus on building structured, accountable marketing systems that deliver measurable commercial growth — not activity for its own sake.

Driving Measurable Commercial Growth Through Structured Marketing Leadership

Fun facts

• I once completed the Ventoux Triple - cycling up Mont Ventoux three times in one day. The best part? Celebrating with a bottle of Ventoux wine in the evening.  
• I share the same birthday as my dog, and our annual tradition is her sharing my fish and chips on the beach!