Finance Manager

Installio; Greater London; On-site; GBP 70,000 - 95,000; Full time

Benefits offered by this job

25 days annual leave

Hybrid working

Pension scheme

Modern working environment

Opportunity to shape the finance team

Job summary

Installio is seeking a proactive Finance Manager to lead day-to-day financial operations for a fast-growing renewable energy startup in the UK. You’ll own management accounting, cash flow, and controls, while partnering with senior leadership to drive performance.

Reporting to the CFO, you’ll shape processes, systems, and reporting to support scaling and strategic decision-making across the business.

Qualifications

• Qualified accountant with professional body designation.
• Experience in finance manager, management accountant or financial controller roles.
• Strong month-end, reporting, and cash flow management skills.

Responsibilities

• Own month-end close and production of management accounts.
• Prepare monthly management packs with commentary for leadership.
• Manage cash flow forecasting, treasury and working capital.
• Support budgeting, forecasting and variance analysis.
• Partner with sales, operations and finance to improve profitability and reporting.
• Oversee accounts payable/receivable, payroll inputs, and VAT submissions.
• Drive finance process improvements and system automation.

Skills

Finance management

Management reporting

Cash flow forecasting

Stakeholder management

Automation

Problem solving

Education

ACA/ACCA/CIMA qualification

Tools

Xero

Job description

Installio is looking for a proactive Finance Manager to help lead the financial operations of our fast-growing Solar and Heat Pump startup. You'll play a pivotal role in ensuring our finances are managed accurately, efficiently, and with strong controls, while driving financial performance and giving the leadership team the insight they need to scale.

This is an exciting opportunity to join a fast-growing renewable energy business where you'll have real ownership over day-to-day finance, work closely with senior leadership, and help shape the processes and systems that support our continued growth.

The Role

As Finance Manager, you'll be responsible for the day-to-day running of the finance function -from transactional accounting through to month-end close and management reporting. You'll own the management accounts, cash flow, and financial controls, ensuring the numbers are accurate, timely, and clearly communicated.

Reporting to the CFO, you'll work cross-functionally with operations, commercial, and leadership teams, using data to identify improvements and drive financial rigour as Installio continues to scale.

What You’ll Do

Financial Management & Reporting

• Own the month-end close process and produce timely, accurate management accounts
• Prepare monthly management reporting packs with insightful commentary for the leadership team
• Manage cash flow forecasting, treasury, and working capital
• Support budgeting, forecasting, and variance analysis against plan
• Help develop KPIs and reporting around revenue, margin, and unit economics

Transactional Finance & Controls

• Oversee accounts payable, accounts receivable, and credit control
• Manage subcontractor and installer payments, retentions, and invoicing processes
• Maintain a strong control environment with robust reconciliations and processes
• Own payroll inputs, expenses, and supplier management
• Ensure VAT returns and other statutory submissions are accurate and on time

Business Partnering

• Provide financial insight to sales, operations, and commercial teams to support decision-making
• Partner with operations on job costing, project profitability, and margin analysis
• Support the CFO on board reporting, investor updates, and fundraising materials
• Help translate financial performance into a clear story for stakeholders

Financial Improvement

• Analyse financial performance and identify opportunities to improve efficiency and scalability
• Develop, document, and optimise finance processes and controls
• Work closely with commercial and operations teams to improve reporting and outcomes
• Support the implementation of new systems, automation, and finance initiatives (e.g. accounting software and integrations)

Compliance & Governance

• Ensure finances are managed in line with company policy and accounting standards
• Maintain accurate financial records and documentation
• Support year-end audit and liaison with external accountants and advisers
• Work with internal teams to ensure compliance across the finance lifecycle

What you’ll bring

Requirements

• Qualified accountant (ACA, ACCA, CIMA)
• Experience in a Finance Manager, Management Accountant, or Financial Controller role
• Strong month-end, management accounts, and reporting experience
• Excellent organisational skills with the ability to manage multiple concurrent workstreams
• Excellent communication and stakeholder management skills
• A process-driven mindset, with a strong focus on automation
• A proactive problem solver who thrives in a fast-paced, scaling environment
• Passion for financial rigour and continuous improvement

Desirable

• Experience with Xero and finance system integrations
• Experience with subcontractor/CIS accounting and construction-style billing
• Familiarity with job costing, project profitability, and margin reporting
• Experience scaling finance processes within a growing business
• Experience within construction, utilities, or renewable energy

Our offer

Benefits

• Competitive salary (dependent on experience)
• 25 days annual leave plus bank holidays
• Flexible hybrid working
• Pension scheme
• Modern and collaborative working environment
• Opportunity to help shape the finance function of one of the UK's fastest-growing clean energy businesses
• Career progression within a rapidly expanding company