Finance Officer

Background

C40 is a network of nearly 100 mayors of the world's leading cities, who are working to deliver the urgent action needed right now to confront the climate crisis, and create a future where everyone, everywhere can thrive. Mayors of C40 cities are committed to using a science-based and people-focused approach to help the world limit global heating to 1.5°C and build healthy, equitable and resilient communities. Through a Global Green New Deal, mayors are working alongside a broad coalition of representatives from labour, business, the youth climate movement and civil society to go further and faster than ever before.

C40's team of 400+ staff is based in offices in London, in New York, Johannesburg, Singapore, Delhi, Rio de Janeiro, Copenhagen, Beijing and Paris, and individual staff based across 25+ different locations.

The strategic direction of the organisation is determined by an elected Steering Committee of C40 mayors, which is chaired by Mayor Sadiq Khan of London and Mayor Yvonne Aki-Sawyerr of Freetown. Three-term Mayor of New York City Michael R. Bloomberg serves as President of the C40 Board of Directors, responsible for operational oversight. A regionally diverse management team, led by Executive Director Mark Watts, leads the day-to-day management of C40. C40's three core strategic funders are Bloomberg Philanthropies, the Children's Investment Fund Foundation and Realdania.

Our international staff work with the C40 network under the leadership of city governments to deliver this mission. Using a data-driven approach, our team identifies and promotes the exchange of proven programmes and policies developed by cities; provides world-class research, technical expertise and access to key partners to deliver new programmes and policies with cities; and communicates cities' individual achievements and collective leadership.

Diversity Statement

C40 is committed to supporting and promoting equity and diversity and creating an inclusive working environment for everyone. We believe that when people with different life experiences are involved in decision-making, we deliver better. 

We believe having a diverse workforce ensures we connect better with all the different communities and people affected by the climate crisis. This enables us to make better decisions which lead to better outcomes in the work we do through increased creativity, productivity, greater global impact alongside a broader perspective and approach to our work.

We welcome applicants that are diverse in terms of age, gender identity, sexual orientation, physical or mental ability, ethnicity and perspective. Our goal is for C40 to be an environment where everyone, from any background, can flourish and can be themselves whilst contributing to our mission. If you identify as a person with a disability, we work to provide reasonable appropriate measures and any additional support needed to provide an equitable working experience. If you are living with a disability, chronic illness or neurodiversity please inform us, to provide you with the proper assistance in the application process.

C40 promotes a work culture where staff can input to improve equity, diversity and inclusion through staff-led groups and formal forums. We know that creating our ideal working environment is a learning process and we are committed to the ongoing effort.

Department Description

The C40 Corporate Services department serves as the non-programmatic support mechanism to the global organisation to ensure efficiency of day-to-day business practices. The team works collaboratively with C40 senior management and staff in providing support and guidance in human resources, information technology, grants management, budgeting, accounting and other administrative functions in accordance with C40's internal policies, procedures and donor regulations.

Position Description

The Finance Officer will be responsible for the processing transactions in the Accounts receivable and compliance functions. This role will engage with the wider organisation to ensure that supplier accounts are up to date. This role will work closely with the other finance officers and will report to the Financial Accountant (Manager). 

Responsibilities: 

• Management of the accounts receivable process:
  • uploading invoice and donor information into C40's Financial Management System (InforSunSystems) as required
  • performing regular bank reconciliations
• Management of the Finance inbox, dealing with queries, invoices, reimbursement requests and other correspondence from staff and suppliers.
• Preparing journal uploads for the Financial Management System.
• Assisting in keeping system guidance and process notes up to date.
• Managing C40's corporate credit card program, dealing with changes in limits and new and cancelled cards.
• Undertaking special Finance projects as necessary.
• Supporting the Finance team during audits by gathering documents and answering queries as required.
• Supporting the Finance team more widely on a variety of tasks as required.

Person Specification:

• Degree or equivalent work experience.
• Experience of working in accounts receivable within a wider Finance team.
• Excellent numeracy, literacy and analytical skills.
• Ability to communicate effectively with colleagues and stakeholders at all levels.
• Ability to maintain confidentiality when dealing with sensitive financial information.
• Ability to work proactively and prioritise tasks effectively in order to meet deadlines.
• Strong organisational skills, with excellent attention to detail.
• Ability to work in a fast-moving and high-pressure environment.
• Ability to quickly learn new IT applications. This is essential because C40 is a paperless organisation and the work of the Finance team is carried out across several systems.
• Good working knowledge of Excel, including Pivot tables and Lookup functions.

Other Requirements:

Applicants must already have the right to work in South Africa. Moderate travel will be required as part of the role. 

Reporting To:  Head of Finance – Compliance & Operations

Term: Indefinite

Location: Johannesburg - Please note that if your right to work in one of the listed locations is not confirmed at the time of applying, C40 will be unable to proceed with your application. 

Salary: (Grade 5) ZAR 493,620 (gross per annum) - Due to its commitment to maintain equity and fairness, C40 operates on a spot salary model. This means that our employees are paid the same salary according to their grade and location. 

Application Process:

Closing date for applications is Tuesday 18th November 2025 at 5.00pm UK Time. C40 reserves the right to close this job opening before the closing date for applications so please do submit applications early.

To learn more about the work of C40 and our cities, please visit , follow us on Twitter @c40cities and like us on Facebook at 

For any queries about the role, please contact  Kindly note that this email address is for recruitment related queries only. We are unable to accept CVs and cover letters sent to this inbox. We can only accept and process applications that are submitted via our website.

C40 is an equal opportunities employer.