Finance Assistant

Better places, thriving communities. Finance Assistant ACL, a subsidiary of the Fire & Security division of Mitie Security Ltd, is a leading Southern-based provider of fire alarm, security, and building management systems. We deliver both new installations and a comprehensive after-sales service, including maintenance and reactive support.

With an annual turnover exceeding £16 million, ACL supports a diverse portfolio of clients and contractors across multiple sectors, underpinned by a strong reputation for quality and reliability.

We are seeking a proactive and detail-oriented Finance Assistant to join our established Finance team. This role will support the day-to-day accounting activities of the business, working collaboratively with colleagues to ensure the accuracy and integrity of financial information. This is an excellent opportunity for someone looking to develop their career within a dynamic and growing organisation.

Key Responsibilities

• Perform a range of day-to-day accounting tasks, working closely with the wider Finance team to support business operations.
• Process purchase invoices across multiple divisions, including accurate allocation of costs between Cost of Goods Sold (COGS) and administrative expenses.
• Complete statement reconciliations, and accurately post payments and receipts.
• Support month-end close processes, including reconciling intercompany balances and ensuring all costs are captured within the accounting system.
• Prepare reports and supporting information to facilitate an efficient and accurate month-end close.
• Build effective working relationships with operational teams and develop familiarity with internal service systems, including Simpro.
• Provide additional administrative and finance support as required by the Financial Controller.

Person Specification

• A conscientious, self-motivated individual who takes ownership of their work and demonstrates a proactive approach.
• Strong numerical skills with a high level of accuracy and attention to detail.
• Ability to manage multiple tasks across different areas of finance in a structured and efficient manner.
• Good IT and systems skills, with a solid working knowledge of Microsoft Excel.
• A collaborative team player with a positive, flexible attitude and a willingness to learn and develop.
• Excellent organisational and time management skills, with the ability to prioritise workload and meet deadlines while maintaining the integrity of financial records.

Skills & Experience

• Proven experience in a broad accounting role within an SME environment, ideally within engineering, construction, or facilities management.
• Sound understanding of core accounting processes, including Sales and Purchase Ledger.
• Practical experience using accounting software such as Sage 50, Sage 200, or similar systems.

Additional Information Knowledge of DRC VAT and CIS would be advantageous, although not essential.

Our market-leading offering provides you with benefits that suit your lifestyle.

We have a virtual GP on hand for you and members of your household. So you can get expert advice by video or phone without having to leave your home. We offer financial wellbeing assistance through our Salary Finance scheme. For example, you could access 50% of your earned pay before payday for a small fee. Salary Finance also offers competitive loans.

When you join us, we’ll give you a link to our flexible lifestyle benefits platform, Choices. You might choose to purchase up to five extra days’ holiday each year. You might buy critical illness insurance, seek dental treatment or buy technology products at an affordable cost. There are many choices!

We give you access to high street discounts from thousands of well-known retailers, gyms and more through our MiDeals platform. And we have a cycle-to-work scheme. Life cover of up to four times your salary is available. We also offer enhanced pension contributions, a save-as-you-earn scheme, and a Mitie Matching Share Plan (you could even be awarded free shares in Mitie).

We award our employees with Mitie Stars as recognition for their hard work. There are cash prizes up for grabs each month and at the end of the year there’s a chance to scoop a top prize of £10,000!

Our success is a direct result of the experience and quality of our people. Progressing your career is therefore a top priority for us. We offer a diverse variety of training and development avenues via a wide selection of learning resources to suit you.

We are committed to ensuring our recruitment process is inclusive and accessible to all. If you have a disability or long-term condition (for example dyslexia, anxiety, autism, a mobility condition or hearing loss) and need us to make any reasonable adjustments, changes or do anything differently during the recruitment process, please let us know by emailing at .

Since 1987, Mitie’s 84,000 employees have been maintaining companies globally. We are the UK’s leading facilities management and professional services company, and our clients range from household names in banking, critical government sites as well as hospitals and schools. Join our Mitie Team. Together our diversity makes us stronger.

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