Tax Manager

Octopus Energy Generation is a specialist energy investment manager, overseeing more than £7 billion of assets under management. Our mission is to accelerate the transition to a net zero energy system by investing in clean energy infrastructure and energy transition businesses. Our strategies span renewable generation, distributed energy, and broader energy transition platforms across multiple technologies and jurisdictions. As our portfolio of development-stage and growth strategies continues to expand, we are strengthening our in-house tax capability to provide proactive, commercially focused support across fund structures and underlying investments.

We are seeking a Tax Manager to join the OEGen Tax Team, reporting directly to the Head of Tax. This role will take primary responsibility for a defined bucket of OEGen’s development funds and associated structures. Unlike platform-embedded tax roles, this position sits within the fund management company and has oversight across the full fund lifecycle - from investment structuring and governance through to portfolio holding structures and exit.

You will act as the central tax lead for these funds, working closely with investment teams, portfolio companies, finance teams, and external advisors across multiple jurisdictions. The role combines fund-level tax strategy and governance with hands-on oversight of compliance, reporting, risk management, and transaction execution. This position offers both breadth and depth: exposure to complex international holding structures, diverse operating models, and direct engagement with senior stakeholders across the business.

• Fund-Level Tax Oversight
  • Take ownership of tax matters relating to a defined portfolio of OEGen development funds and their associated structures.
  • Support holding structures, and cross-border investment planning in collaboration with the investment team and external advisors.
  • Ensure tax considerations are appropriately reflected in documentation, SPV structuring, financing arrangements, and exit planning.
• International Tax Compliance
  • Oversee the delivery of tax compliance obligations (e.g. corporate income tax, VAT, withholding tax, local filings) across fund and holding structures in multiple jurisdictions.
  • Coordinate and manage local advisors to ensure accurate, timely submissions and full regulatory compliance.
  • Maintain oversight of compliance calendars and reporting trackers at both fund and asset-holding levels.
• Tax Accounting and Reporting
  • Support fund & platform finance teams with tax provisioning and financial statement disclosures.
  • Review tax-related journal entries and ensure appropriate treatment of current and deferred taxes.
  • Oversee the integrity and documentation of tax positions reflected in audited financial statements.
• Governance and Risk Management
  • Maintain robust tax governance frameworks across the relevant funds and structures.
  • Oversee tax audits or enquiries by local authorities, managing advisors and internal stakeholders.
  • Identify, assess, and elevate material tax risks in a commercially informed and pragmatic manner.
  • Ensure alignment with OEGen’s broader tax strategy, risk appetite, and governance standards.
• Transaction & Project Support
  • Lead tax workstreams on acquisitions, disposals, restructurings, refinancings, and group reorganisations within the relevant funds.
  • Review legal and commercial documentation with a tax lens, identifying structuring implications and risk areas.
  • Coordinate external advisors and internal stakeholders to ensure seamless execution of tax aspects of transactions.
• Internal Stakeholder Engagement
  • Act as the primary tax point of contact for investment teams, fund finance teams, and portfolio/platform management teams across the relevant funds and their underlying structures.
  • Work collaboratively with the wider OEGen Tax Team to ensure consistency of approach, knowledge sharing, and best practice implementation.
  • Provide clear, practical tax guidance that balances technical robustness with commercial objectives.

• Minimum 5-6 years’ post-qualified experience in corporate tax.
• Qualified tax accountant (CTA or ACA with a tax specialism). Tax lawyers with strong hands-on tax accounting and compliance experience will also be considered.
• Background in a Big 4 firm, leading international law firm, or in-house tax function with cross-border exposure.
• Experience dealing with multi-jurisdictional structures and external advisors.
• Strong knowledge of corporate tax compliance and reporting across multiple jurisdictions.
• Solid grounding in tax accounting, provisioning, and financial reporting.
• Ability to oversee complex international structures without necessarily having deep local expertise in every jurisdiction.
• Confident reviewing transaction documents and identifying tax structuring implications.
• Strong project management skills, with the ability to prioritise competing deadlines.
• Clear communicator, capable of engaging effectively with senior finance and investment professionals.

• Experience in infrastructure, energy, or other asset-heavy industries.
• Familiarity with fund structures and investment management environments.
• Language skills (German, French, Italian, or Spanish) are highly desirable.
• Pragmatic, solutions-oriented, and comfortable operating in a dynamic, growth-focused environment.