Outsourcing Accountant jobs in London

Position: Finance Systems & Reporting Accountant

Location: Newall Road, Heathrow, TW6 2TA

Effective Date: October 2026

Contract: Permanent, Full Time

Reporting to: Chief Financial Officer

Hybrid: 3 days office / 2 days working from home

Salary: £50,000 - £60,000 plus discretionary performance bonus

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DiamondAir International is the world’s leading provider of luxury Meet & Assist services, with over 30 years’ experience in the industry. Our expertise and exponential growth has allowed us to be a pioneer in service development and a leading exemplary operation on the ground. We continuously develop our services with the latest technologies to ensure they can be provided in the most efficient way possible.

A key part of your responsibilities will be to process and protect the companies’ data in accordance with data protection laws and policies.

About the Role

DiamondAir is undertaking a significant finance transformation as part of the implementation of a new technology platform and the development of a scalable, insight-led finance function.

The Finance Systems & Reporting Accountant will be responsible for ensuring the integrity, structure and effectiveness of the finance systems and reporting environment. Acting as the bridge between Finance, Operations and Technology, the role will own financial reporting structures, chart of accounts governance, system optimisation, reporting automation and data quality, ensuring data integrity and effective integration between finance and operational systems.

This is a hands-on role for a qualified accountant who combines strong accounting fundamentals with a passion for systems, data and continuous improvement. The role will work across DiamondAir's finance operational and reporting systems, helping to create a connected and scalable technology environment that supports business growth.

DiamondAir International is the principal operating company within the Group and operates Sage 300 as its core finance system. Several smaller subsidiary entities, which are also within the remit of this role, utilise Sage 50.

The current operating and finance systems are only partially integrated, primarily across sales transactions. A new business platform is being implemented to create greater connectivity between operational and financial processes, including both revenue and cost of sales. The successful candidate will play a key role in supporting this transformation and ensuring the integrity of the Group's financial data, reporting structures and system configuration.

The successful candidate will play a key role in the successful implementation of DiamondAir's new platform and the development of a scalable, insight-led finance function. Beyond implementation, they will own the evolution of the finance systems and reporting environment, ensuring it continues to support business growth, operational efficiency, management insight and future transformation initiatives.

Key Responsibilities

Finance Systems & Transformation

• Play a key role in the implementation, testing, rollout, stabilisation and ongoing optimisation of DiamondAir’s new technology platform.
• Act as the finance subject matter expert for Sage 300, finance system configuration, chart of accounts design, reporting structures and financial data requirements.
• Support finance workstreams including system configuration, data validation, user acceptance testing (UAT), reporting development and post-go-live stabilisation.
• Ensure financial data is accurately captured, validated and transferred between operational and finance systems, maintaining the integrity of revenue, cost of sales and financial reporting data.
• Work with internal stakeholders and external vendors to ensure finance requirements are effectively translated into system solutions, integrations and efficient workflows.
• Identify opportunities to automate manual finance processes, strengthen controls and improve data quality, integrity and operational efficiency.
• Support the development and maintenance of integrations between finance and operational systems.
• Drive continuous improvement of finance systems, reporting capabilities and end to end finance processes following implementation.
• Support future systems enhancements, reporting developments and wider finance transformation initiatives.

Chart of Accounts & Financial Data Governance

• Own and maintain the Chart of Accounts structure.
• Create, maintain and govern nominal ledger accounts, departments, cost centres and reporting dimensions.
• Maintain mappings between nominal ledger accounts, management reporting structures and statutory financial statements.
• Ensure reporting hierarchies remain accurate, scalable and aligned to business requirements.
• Develop and maintain governance processes around financial master data.

Reporting & Business Intelligence

• Develop reporting structures and solutions, including BI dashboards and analytical tools that support management reporting, profitability analysis, working capital monitoring, forecasting and business performance management.
• Develop, maintain and continuously enhance Power BI dashboards and reporting solutions that provide meaningful operational and financial insight.
• Work closely with the Finance team to ensure reporting outputs reconcile to management accounts and support month-end, forecasting and business performance processes.
• Improve automation of reporting processes and reduce reliance on manual spreadsheet-based processes and reporting.
• Work with stakeholders across the business to understand and deliver reporting requirements.
• Develop reporting that supports operational performance, margin monitoring, customer profitability and working capital management.

Data Quality & Analytics Support

• Ensure the integrity, consistency and accessibility of financial and operational data that underpins management reporting, business intelligence, forecasting and decision-making across the organisation.
• Develop and maintain data models to support management reporting and financial analysis.
• Provide robust data and reporting foundations to support FP&A, budgeting, forecasting and business partnering activities.
• Support the finance team with ad-hoc analysis and reporting requests where required.

Controls & Audit Readiness

• Embed financial controls within finance system workflows.
• Develop and maintain system documentation, process maps and reporting methodologies.
• Support the development of audit trails and reporting controls.
• Assist with audit readiness and compliance initiatives.
• Contribute to the development of finance policies, procedures and governance frameworks.

Person Specification

Qualifications

Essential

• ACA, ACCA or CIMA qualified.
• Strong grounding in accounting principles and financial reporting.

Desirable

• Power BI certification or equivalent.
• Finance systems, ERP or data analytics training.

Experience

Essential

• Qualified accountant with a minimum of 2 years' relevant post-qualification experience.
• Experience in a Systems Accountant, Reporting Accountant, Finance Systems or similar role.
• Experience maintaining chart of accounts structures and financial reporting hierarchies.
• Experience mapping nominal ledgers to management accounts and statutory financial statements.
• Experience developing management reporting solutions.
• Advanced Excel skills including Power Query, financial modelling and data analysis.
• Experience working with finance systems and large financial datasets.

Desirable

• Experience supporting ERP implementations or finance transformation projects.
• Experience developing Power BI dashboards, reporting models or business intelligence solutions.
• Experience within a growing or changing business environment.
• Exposure to process automation and workflow technologies.

Skills & Behaviours

• Strong accounting fundamentals and technical competence.
• Excellent systems aptitude and interest in technology.
• Highly analytical with strong attention to detail.
• Strong problem-solving capability.
• Ability to translate business requirements into practical reporting solutions.
• Effective communicator with the ability to influence stakeholders at all levels.
• Ability to build effective relationships across Finance, Operations, Technology and external partners.
• Organised, proactive and delivery focused.
• Continuous improvement mindset.
• Commercial awareness and understanding of how data supports business decision-making.

Success Measures

Within the first 12 months the successful candidate will:

• Support the successful implementation and stabilisation of the new technology platform.
• Take ownership of the Chart of Accounts and reporting architecture.
• Deliver improved reporting automation and Power BI capability.
• Establish robust nominal ledger mapping to management and statutory reporting structures.
• Improve financial data quality and reporting consistency across the business.
• Reduce manual reporting effort across the finance team.
• Strengthen audit readiness through improved controls, documentation and data governance.
• Create the reporting and data foundations that enable FP&A and business partnering activities to flourish.

Pay: £50,000.00-£60,000.00 per year

Benefits:

• Bereavement leave
• Company pension
• Discounted or free food
• Employee discount
• Free parking
• Health & wellbeing programme
• On-site parking

Work Location: In person