Fractional CFO, London,

posted: 17th November 2025

Job Title: Fractional CFO – Deep Tech Sustainability Start-up
Location: Central London (Hybrid – 1–2 days per week in person)
Engagement: Part-time / Fractional
Compensation: Flexible day rate equity potential

About the Company

A pioneering clean-tech venture is developing hardware solutions to address global water scarcity. The company has created a novel system that extracts drinking water from ambient air, even in harsh and arid conditions. Backed by recent scientific recognition and operating under multiple patents, the company has moved from successful prototyping into commercial unit development.

With a cross-border presence across the UK and Southern Europe and 20 employees, the business is approaching a critical inflection point: ramping toward first revenue, entering discussions with institutional investors, and preparing for scaled production. The founder is an experienced finance executive turned entrepreneur, and the broader team brings expertise across engineering, science, and impact innovation.

The Opportunity

This is a high-impact fractional CFO role designed for a strategic, hands-on finance leader who thrives in early-stage environments. You’ll serve as the most senior finance presence in the business, partnering closely with the founder and small executive team to build financial maturity, engage investors, and prepare the business for sustainable growth.

The expectation is 1–2 days per week commitment, with occasional in-person presence.

Key Responsibilities

• Model Rebuild & Forecasting: Redesign and own a fit-for-purpose financial model for internal and external use.
• Fundraising Support: Partner with the CEO on investor readiness – including financial storytelling, materials, due diligence prep, and scenario modeling.
• Cash Management & Controls: Lead cash flow oversight, cost discipline, and implementation of appropriate early-stage processes.
• Cross-Border Finance: Support financial operations across multiple jurisdictions (UK EU), including accounting, FX, compliance, and regulatory awareness.
• External Stakeholder Liaison: Oversee outsourced accounting and bookkeeping functions. Ensure clean, accurate data feeds into board and investor reporting.
• Strategic Financial Insight: Act as a thought partner on pricing, unit economics, hardware costing, and long-term value creation.

Ideal Candidate

• We’re seeking a commercially minded CFO with:
• Proven experience in early-stage or growth ventures, especially in hard tech or impact-led businesses
• Track record of working closely with founders and/or boards
• Strong financial modeling and investor presentation skills
• Operational confidence in cash oversight, fundraising, and reporting
• Global outlook and comfort with multi-country operations
• Pragmatic mindset: hands-on, adaptable, mission-aligned
• Experience in climate tech, deep tech, engineering-led ventures, or complex hardware models is a plus.

Why This Role?

• Mission-Driven: Tackle a global sustainability challenge with a team committed to real-world impact.
• Equity Upside: Significant long-term opportunity aligned to business growth and value creation.
• Leadership Seat: Join the founding team during a formative phase – your financial leadership will shape the company’s next chapter.

Flexible Engagement: High-autonomy role with hybrid/part-time structure – ideal for portfolio CFOs or transition-phase executives.