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Part-time Office Manager/ Financial Administrator

Greengauge Building Energy Consultants Limited
Bradford on Avon, Wiltshire

Closing date: 17th November 2025
Interviews: In person, w/c 1st December 2025 (we reserve the right to alter this schedule)

About Greengauge

Greengauge Building Energy Consultants is one of the UK’s most experienced and trusted building and engineering consultancies specialising in sustainable, low energy design. We work with architects, homeowners and commercial landlords across the UK on new build and retrofit projects in both residential and commercial sectors. We aim to deliver buildings that combine comfort, simplicity and efficiency.

We are an employee-owned business (EOT) with approximately 15 staff across two offices, which means all employees have an important ownership stake in the company’s success through a trust structure.

The Role

We’re looking for an experienced part-time Office Manager/Financial Administrator who thrives in a dynamic, purpose-driven environment. This role sits at the operational heart of our business, supporting our three Directors with the financial administration, business operations, and strategic planning that keeps our consultancy running smoothly.

The scope of this role is flexible (25-37.5 hours per week) depending on the candidate’s skills, capacity, and preferences, with potential to grow based on mutual fit.

You’ll be working with a complex, technical business that requires someone who can stay organized under pressure, juggle competing priorities, and bring both rigour and initiative to day-to-day operations.

Key Responsibilities

Financial Administration & Business Operations

  • Managing our Xero accounting platform including:
    • Invoicing and credit control
    • Processing payments and team expenses
    • Administering payroll (with support from our accountant and operations director)
    • Supporting tax return preparation
  • Monitoring cashflow and providing Directors with critical financial information
  • Generating KPI reports from financial data for Directors and the Employee Owner Trust
  • Assisting Directors with budget development through data gathering and analysis
  • Supporting R&D Tax Credit applications with our specialist accountants

Office & Business Administration

  • Managing our timesheet system – maintaining accurate project time tracking across the team
  • Managing day-to-day business operations: insurance, rent, office supplies, equipment, cleaners
  • Directing new enquiries to relevant technical staff and responding appropriately to other correspondence
  • Liaising with opposite numbers at supplier and client organisations
  • Liaising with banks, HMRC, and other external stakeholders
  • Supporting new recruitment and onboarding processes
  • Procurement of materials, equipment, and services
  • Preparing agendas and materials for board and other meetings
  • Creating accurate minutes and tracking action items

Strategic Support

  • Supporting Directors in rolling out new initiatives and business processes
  • Assisting with data gathering and analysis for strategic decision-making
  • Other responsibilities as the business evolves

Essential Requirements

We need someone who:

  • Excels at Excel – You’re highly proficient with advanced functions including pivot tables, complex formulas, and data analysis. This is a critical skill for this role.
  • Stays calm under pressure – You can prioritize effectively, meet deadlines, and handle multiple competing demands without losing attention to detail.
  • Is exceptionally organized – You have proven systems for managing complexity and can demonstrate a track record of successfully juggling administrative and financial responsibilities.
  • Works autonomously – You’re self-motivated with excellent initiative, but equally comfortable collaborating as part of a team.
  • Has solid financial administration experience – You’ve worked with accounting platforms (Xero or similar) and understand bookkeeping principles, invoicing, credit control, and basic financial reporting.
  • Handles sensitive information appropriately – You have experience managing confidential business and employee information.
  • Is technically competent – Strong skills in Microsoft Word, Outlook, and PowerPoint, with the capacity to learn new software quickly.
  • Shares our commitment to sustainability – You’re genuinely committed to reducing the environmental impact of the built environment and the wider UK economy. You don’t need to have chained yourself to anything, but you should care deeply about climate action and be motivated by work that makes a real difference.

Desirable (But Not Essential)

Skills and experience that would command a higher salary and expand the role scope:

  • Broader business administration knowledge including:
    • Contract review and administration
    • Basic legal/commercial awareness
    • HR processes and employment matters
    • Financial planning and forecasting
  • Business tools procurement and development – Experience researching, selecting, implementing, and managing business software (e.g., timesheeting systems, project management tools, CRM platforms)
  • Construction or engineering sector experience – Understanding the technical context of our work and familiarity with sector norms
  • VBA programming – Ability to automate and enhance Excel workflows

These transferable business skills would enable you to take on additional strategic responsibilities and grow with the role.

What We Offer

  • Salary: £35,000-£40,000 FTE per annum (pro-rated to agreed hours), dependent on experience
  • Flexible part-time hours: 25-37.5 hours per week
  • Hybrid working: Work from home most of the time, with at least one day per week in our Bradford on Avon office (intensive office-based settling-in period initially)
  • Employee ownership: A genuine stake in the business through our EOT structure
  • Purpose-driven work: Contribute to the UK’s transition to sustainable buildings

How to Apply

Please send your CV and covering letter to info@ggbec.co.uk with the subject line: “Office Manager/Financial Administrator”

Tell us about your Excel expertise, how you handle pressure and competing priorities, and what transferable business skills you could bring to expand this role.

Closing date: 17th November 2025
Interviews: In person in Bradford on Avon, w/c 1st December 2025