Finance Business Partner in City of Westminster

About Greensphere Capital

Greensphere Capital has been a leader in pathbreaking sustainable investment for over 15 years, most recently investing as a science‑led growth equity fund investing in nature, biodiversity, and climate via the Gaia Sciences Innovation fund. We back exceptional companies solving commercial pain points across the land and ocean based economies. Our portfolio spans bioenergy, nature positive data infrastructure, sustainable forestry and urban regeneration. We're a small, high‑trust team. Everyone does real work and there is no room for stragglers.

Growth and opportunity

We are looking for a sharp, organised finance professional comfortable with the detail to support the CFO of our portfolio companies and Managing Partner of the fund in a dual role which will give you exposure across SME and fund entities.

The role

The Finance Business Partner is to be the financial and operational backbone across both the fund and our portfolio companies, with exec leadership support. This is a broad, hands‑on position – from setting up bank accounts for newly onboarded portfolio companies to liaising with fund administration, reviewing management accounts, invoicing, and payments across the Greensphere Capital and GSI portfolio. You’ll sit at the intersection of two reporting lines: working with our fractional CFO on portfolio company finance, and with the Managing Partner on fund administration. It’s a role that rewards people who are genuinely on top of the details and don’t need to be chased. We operate across a number of related entities — fund vehicles, GP entities, operating companies, portfolio co‑invests — and you’ll be across all of them. We’re open to a contract or FTE arrangement from the outset, moving into a permanent role — and to flexible hours for the right person.

What you’ll do

• Fund administration
  • Liase with fund accounting and administration teams across Greensphere Capital.
  • Review the management accounts, ensuring accuracy across both entities.
  • Keep track of the payment and invoicing cycle (Greensphere) and liaise with external accountants and auditors as required.
  • Support VAT, compliance, and statutory reporting requirements.
• Portfolio company support
  • Set up operational finance infrastructure for new portfolio companies — banking, entity set‑up, financial processes and insurance.
  • Work alongside the fractional CFO to provide financial oversight and support to portfolio companies at critical growth stages.
  • Prepare and review management accounts for relevant portfolio entities.
  • Support financial due diligence and reporting through the investment lifecycle.
• Day‑to‑day operations
  • Cash flow monitoring support.
  • Maintain accurate records across entities and flag issues early.
  • Build and improve financial processes as we scale.
  • Handle ad‑hoc finance and ops requests across a busy, varied portfolio.
  • Project work: explore new ways of making the finance and operations functions across the GSI portcos more efficient.

Who we’re looking for

You might be part‑qualified, finalist or newly qualified and looking for an environment where you can qualify while doing genuinely interesting work. Or you might have spent years in management accounting or finance management, know your craft inside out, and want to get involved in something more dynamic than a traditional corporate finance role.

You’ll likely have:

• Solid, hands‑on management accounting or financial control.
• Confidence across the full finance cycle: accounts, reconciliations, invoicing, payments, reporting.
• Enough operational breadth to set up a bank account or sort a VAT query without waiting to be told how.
• Comfort working across a web of related entities — fund vehicles, GP entities, operating companies, and portfolio co‑invests — keeping each clean and never losing the thread.
• Part‑qualified ACA, ACCA, or CIMA — or equivalent experience that tells the same story.
• A high bar for accuracy and a low tolerance for letting things slip.

Bonus if you have

• Experience in a fund, investment firm, or PE‑backed environment.
• Familiarity with portfolio company finance support or fractional CFO structures.

What we offer

• ACA study support available for part‑qualified candidates.
• Contract or permanent arrangement.
• Flexible working hours, with London office time built in.
• A genuinely interesting portfolio and a team that trusts you to get on with it.