The Opportunity Our customer, a fast-growing cleantech company developing groundbreaking green hydrogen production technology, is seeking a Finance Manager to play a key role in shaping and managing their financial operations. This is a unique opportunity to join a mission-led business transforming the energy sector with an innovative, ultra-efficient electrolyser technology. As Finance Manager, you'll be the backbone of their fully digital financial systems—ensuring strong foundations for purchasing, reporting, and financial compliance (including grant funding). You'll also play a strategic role in developing models and insight to support commercial decision-making, contributing directly to the company’s growth in the green hydrogen market. The role requires the candidate to work on a hybrid basis, ensuring they are onsite at the company’s West-London HQ approximately 2 days/week, with the remaining 3 days able to work from home. Key Responsibilities Compliance & Reporting * Prepare monthly and annual financial documents * Ensure compliance with legal and accounting standards * Record financial transactions to meet grant audit standards Operational Finance * Produce month-end reports, reconciliations, accruals, and management accounts * Create and manage company budgets * Oversee profit & loss and balance sheets, and support cash flow reporting * Prepare VAT returns via Xero Financial Administration * Manage payroll, pensions, and expense reimbursements * Reconcile bank accounts and credit card transactions * Prepare purchase orders and weekly payment files * Administer accounts payable including coding and payments What You’ll Bring * Proven experience with Xero and strong IT skills (especially Google Sheets) * Recognised bookkeeping/accounting qualification (AAT, ACA, CIMA, ACCA, or equivalent) * A track record in accurate bookkeeping and management accounting * Excellent interpersonal skills with a proactive, process-driven mindset * Adaptability and self-motivation to thrive in a fast-paced, scale-up environment * Passion for continuous improvement and high standards of accuracy Desirable Experience * Working within start-ups or high-tech environments * Managing grant reporting (e.g., Innovate UK, SBRI, EU funding) * Knowledge of R&D tax credits or Patent Box applications Why Join? Our customer is on a mission to accelerate the global adoption of green hydrogen. Their patented high-pressure electrolyser technology is already gaining global recognition, winning accolades from Shell, CEMEX, and CleanTech Group. You’ll join a collaborative, values-led team building solutions that will reshape heavy industry, transport, and energy infrastructure—without relying on rare earth metals or harmful chemicals. This role is Be part of a company committed to: * Sustainability – delivering PFAS-free and high-efficiency solutions * Innovation – achieving world-leading electrochemical performance * Impact – contributing meaningfully to the global net zero transition Interested? If you're a methodical, commercially minded finance professional who thrives in fast-paced environments and wants to make a real impact, we’d love to hear from you