Finance Administrator

Job overview

• Location: Remote in the UK, with regular travel to London (must be based in the UK)
• Position: Part-time (22.5 hours per week)
• Salary: £24,000-£28,000 FTE (Full-Time Equivalent, pro-rated based on part-time hours of 22.5 per week)
• Experience level: Mid (2-5 years)

Who are we? 

Sintali is an environmental certification company on a mission to accelerate the global transition to a sustainable built environment. We operate internationally, working in over 90 countries to verify and certify the environmental performance of buildings and green infrastructure, helping organisations around the world reduce their carbon footprint, create positive value for nature and drive meaningful impact.

As a purpose-driven and fast-growing SME, we combine technical expertise with innovation to scale climate solutions globally.

Our services are comprised of two core certification schemes; EDGE and Building with Nature. EDGE was created by the International Finance Corporation (IFC), member of the World Bank Group, and is an innovative green building standard and certification. EDGE makes it faster, easier and more affordable than ever before to build and brand green. EDGE is revolutionising green buildings around the world and enabling mass market transformation of the built environment. Building with Nature is the UK’s leading benchmark for green infrastructure. Building with Nature puts nature at the heart of development in a way that’s good for people and for wildlife.

Joining Sintali means being part of a passionate team that values integrity, collaboration, and the drive to make a real difference—while building the systems and infrastructure that support sustainable growth.

The role 

We are looking for a Financial Administrator to keep Sintali’s financial engine running smoothly as we continue to grow our impact globally. Operating in over 90 countries and supporting a diverse range of clients, this is a hands-on role at the heart of an ambitious, purpose-driven organisation.

We’re seeking a detail-oriented, proactive finance professional who can bring rigour to day-to-day processes while supporting the systems and reporting that underpin our growth. You’ll be responsible for managing invoicing, supplier payments, bookkeeping, and financial reporting, ensuring our financial operations run efficiently and accurately.

This role is all about maintaining financial integrity, improving workflows, and supporting decision-making with reliable data. To succeed, you’ll need strong organisational skills, solid knowledge of UK accounting practices, and the ability to manage multiple priorities in a fast-paced environment. If you thrive on structure, accuracy, and helping a growing team stay on top of the numbers, we’d love to hear from you.

Key tasks and responsibilities:

Financial Operations

• Set up client projects, process invoices, track payments, and manage accounts receivable and payable.
• Handle bank reconciliations, payroll assistance, expense tracking, and credit card reconciliations.
• Support timely month-end close and maintain accurate, up-to-date financial records.

Reporting & Analysis

• Prepare monthly financial summaries and reports for internal and external stakeholders.
• Support budget preparation, variance analysis, and maintain documentation for audits and certifications.
• Assist with project time tracking and data aggregation for dashboards and KPIs.

Compliance & Administration

• Ensure all financial activities meet HMRC regulations and industry standards.
• Maintain VAT records, support returns, and liaise with external accountants and auditors as needed.
• Assist with ISO and certification-related financial documentation and compliance requirements.

Client & Team Support

• Respond promptly to finance-related client queries and provide clear, professional support.
• Collaborate with sales, operations, and certification teams to ensure smooth processes.
• Prepare partner reports and support management with data-driven insights.

Key skills and experience (required):

• Proven experience in finance administration (ideally in a small business setting)
• Proficiency in accounting software (Xero preferred) and Microsoft Excel
• Strong attention to detail and organisational skills
• Able to demonstrate ability to learn new concepts and apply critical thinking
• Able to prioritise competing responsibilities whilst follow company process and procedures
• Understanding of UK financial regulations and VAT processes
• AAT qualification or equivalent (or working towards a qualification)
• Excellent analytical and communication skills.
• Results-driven and self-motivated.
• Ability to thrive in a fast-paced, dynamic environment and adapt to changing priorities. 

Key skills and experience (nice to have):

• Experience in a sustainability-focused or purpose-driven business.
• Exposure to scaling startups.

What does Sintali offer you?

• A challenging position within a fast-growing, purpose-driven, international startup, with a real opportunity to have significant impact on our vision and business growth
• A remote-first work environment with regular in-person meetings in central London
• A team of enthusiastic, passionate colleagues who prioritise collaboration and impact
• Space for personal development, career opportunities and contributing to a sustainable future
• One paid day off for volunteering
• Life insurance
• A competitive salary and benefits package including 25 days holiday