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Financial Controller at Climate Arc. About Climate Arc . The climate crisis demands urgent action. Every financial decision shapes our shared future. . Climate Arc delivers the information, connections, and influence needed to accelerate the global transition. We are more than a grantmaker or technical team—we connect the dots between complex science and finance systems, translating this trusted data into actionable analysis to enable financial decision-makers to move capital quickly and at scale. . In this way we’re supporting systemic change—unlocking capital, building capacity, addressing critical gaps in transition finance—so lasting solutions for a resilient future become a genuine reality. We work with urgency to co-create point-in-time solutions, while building a legacy of infrastructure and knowledge that will empower resilient economies and societies well into the future. . About the role . Climate Arc is seeking a Financial Controller to support management of the day-to-day financial operations of Climate Arc, ensuring timely, accurate, and compliant financial reporting, robust internal controls, and effective stewardship of our financial systems. . Reporting to the Head of Business Operations you will ensure that Climate Arc’s finance processes run smoothly and that accurate financial information is readily available to support organisational decision-making. This is an operational management role focused on financial control and compliance. The Finance function will also include a Management Accountant role who the Financial Controller will provide guidance and mentorship to.  . The role is offered on a 12-month fixed-term basis, with the expectation of becoming permanent. . Key Responsibilities . Financial Operations . Manage the month-end and year-end close processes, ensuring accuracy and timeliness . Prepare management accounts, variance analyses, and other financial reports for internal use . Maintain and operate strong internal controls to safeguard assets and ensure data integrity . Oversee accounts payable, accounts receivable, payroll processing, and bank reconciliations (via Management Accountant and external providers) . Oversee the processing of invoices, expense claims, and payment runs . Ensure correct submission of information to HMRC and manage the relationship . Financial Reporting & Compliance . Prepare statutory accounts in accordance with UK and US reporting requirements, liaising with external accountants and auditors as needed . Support the preparation of the Annual Report, focusing on the accuracy of financial sections . Ensure compliance with relevant accounting standards, tax laws, and charity regulations in all jurisdictions in which Arc operates . Prepare and file required tax returns (UK and US) in collaboration with external advisors . Audit & Risk . Manage the annual audit process, acting as the primary point of contact for auditors . Maintain compliance with internal policies and relevant regulations . Implement financial process improvements as required, under the guidance of the Head of Business Operations . Implement robust Treasury & Cash Management in line with established policies and procedures . Monitor cash flow and bank balances, producing cash flow reports for the Head of Business Operations . Systems & Processes . Maintain and optimise finance systems, ensuring they are fit for purpose and support accurate reporting . Support finance-related training for non-finance colleagues to ensure compliance with internal procedures . Required: . Qualified accountant (ACA, ACCA, CIMA, CPA, or equivalent). . Proficient in accounting systems (Xero preferred). . Excellent Excel and data manipulation and modelling skills. . Strong knowledge of accounting principles, internal controls, and statutory reporting requirements (UK essential; US desirable). . Experience managing audits and year-end reporting. . Agile approach to work matching Arc’s pace and continuous improvement. . Ability to manage projects and provide advice in a fast-paced startup environment, whilst maintaining meticulous attention to accuracy and detail. . Excellent oral and written English language and communication skills. . Desirable: . Experience in a non-profit or charitable organisation, preferably with multi-jurisdiction operations. . Experience implementing finance systems or process improvements. . Demonstrated experience leading or supervising finance staff or outsourced providers. . Knowledge of both UK and US non-profit financial compliance. . Company Location: United Kingdom.