Head of Finance

Type: Full-time in London (Waterloo, hybrid) Reports to: Chief Operating Officer What We Do At Heat Geek, we are tackling one of the UK’s biggest carbon contributors: home heating. Nearly 20% of all UK carbon emissions stems from home heating – and that contribution is even bigger on a global scale. At Heat Geek, we are changing that. By simplifying a traditionally complex industry and revolutionising the technology used by installers, we’re making low-carbon heating mainstream. We have already prevented 2,500,000+ kg of carbon from entering our atmosphere, and we won’t stop there! Join Us! People are at the core of who we are and what we do. From decreasing homeowners’ energy bills to help with the cost of living, to empowering talented heating engineers to perform outstanding installations, to ensuring a greener world for all of us, we believe in the power of what we can all do together. – And we need passionate, talented, hard working people to be a part of this journey. Your Mission Heat Geek is excited to bring a Head of Finance into our team. We want someone to own the finance function end to end: run it tightly, understand what the numbers are telling us, automate aggressively, and turn insight into decisions. You’ll be our number one in finance, working directly with the CEO and COO, and building the team that gets us through the next stage of growth. If you’re reading this and it resonates with you, we know that you are talented and could do this work anywhere. But we want you to do it HERE, with us, because we need persevering teammates who care about making a real difference in the world. What you'll own A tightly run finance function. You’ll bring an auditor’s mindset to how we operate. That means proportionate but robust controls, a clean close, and a monthly set of numbers on Heat Geek’s performance that the leadership team trusts without caveats. P&L against budget and prior periods, balance sheet reviews, cash and debtor discipline, all delivered on time and to a standard you’d be happy to defend. Analysis and comprehension of the numbers. Producing the numbers is the baseline. You’ll understand them. That means spotting the trend before it becomes a problem, noticing the margin that’s drifting or the cost line that doesn’t add up, and getting to the root cause rather than just reporting it. When something needs attention you’ll flag it clearly at the top of the business and own driving it to resolution. We want someone who reads the monthly pack and tells us what it means, not just what it says. Data, automation and AI. You’ll make finance a reason Heat Geek excels, not a cost centre that keeps up. You’re technically minded and already use AI tools every day. You’ll own our finance systems and data architecture, integrate them cleanly with the wider platform, build self-serve reporting so budget holders stop waiting for month-end, and set sensible guardrails around accuracy, auditability and data protection. The aim is a function that scales on systems, not headcount. Business partnering. You’ll bring the numbers to life. Quarterly budgeting and reforecasting, cash and runway, scenario modelling with the leadership team on the decisions that actually matter, and strategic support through fundraising and investor reporting. You’ll be a trusted partner to the CEO and COO, not a reporting line. Team leadership. You’ll build and grow a high-performing finance team, and you’ll do it as a supportive, development-focused manager. Clear expectations, clear roles, real progression pathways, and a culture of ownership, commercial thinking and curiosity about better ways of working. Candidate Requirements • Qualified accountant (ACA, ACCA, CIMA or equivalent) • Proven startup or scale-up experience as the n