Finance & Operations Manager | Climate Tech Start-up | London

Finance & Operations Manager | Climate Tech Start-up | London

Harmonic are partnering with a mission-led technology business to make their first dedicated Finance & Operations hire as they enter an exciting phase of growth.

The company has developed a highly specialised data and analytics platform that supports organisations in navigating complex, real-world challenges. With increasing demand for their technology and a growing international client base, the business is now investing in its internal infrastructure to support the next stage of its development.

This is a hands-on, high-impact role with unparalleled exposure across finance and operations working side-by-side with world-leading scientists, engineers, and industry experts at the forefront of climate tech innovation. You’ll join a collaborative, high-calibre team who are passionate about their mission and focused on building a business that delivers meaningful impact.

The Role

As the first dedicated Finance and Operations hire, you’ll play a key role in supporting the operational backbone of a fast-moving, mission-driven company. You’ll take ownership of core finance activities while helping to introduce the processes, controls and operational structure that enable the business to scale effectively. Partnering closely with senior leadership, you’ll play a key role in providing clarity and insight to support decision-making.

Responsibilities:

• Own end-to-end finance operations, including AP/AR, invoicing, payments, expenses, vendor management, cashflow oversight, and month-end close in Xero
• Establish robust financial controls across accruals, revenue, and costs, ensuring accurate, audit-ready books as the company scales.
• Deliver clear financial reporting, producing board-ready insights that give leadership timely visibility of company performance.
• Act as the primary liaison with external accountants, supporting statutory filings and compliance with accurate and well-prepared information.
• Build and continuously improve scalable processes and systems, introducing automation and stronger workflows where appropriate.
• Maintain governance discipline through organised board materials, company records, and contract management across employees, contractors, and vendors.
• Support payroll coordination, HR documentation, onboarding/offboarding processes, and system access management in partnership with the CTO.

Requirements:

• Qualified Accountant preferred (ACCA, CIMA, ACA or equivalent) – Qualified by Experience also considered.
• Broad finance/operations exposure, preferably gained in a tech, analytics, engineering, or start-up environment.
• Strong organisational skills with excellent attention to detail.
• Advanced Excel/Google Sheets skills.
• Strong grasp of core finance processes and financial controls.
• Clear communicator, reliable follow-through, and able to work autonomously.

Location: London (Hybrid)

At Harmonic, we are dedicated to fostering an inclusive and equitable workplace. We actively welcome applications from individuals of all backgrounds and assure you that every candidate will be thoughtfully considered for the roles we represent, without regard to race, religion, gender expression, disability, or sexual orientation.