Tax Assistant Manager / Emerging Tax Manager

Octopus Energy Generation (OEGen)

Octopus Energy Generation (OEGen) is a specialist energy investment manager with more than £8 billion in assets under management. Our purpose is clear: to help drive the transition to a net zero energy system by investing in clean energy infrastructure and energy transition businesses across international markets.

As our global portfolio continues to expand, we are growing our in-house tax capability and are looking for a commercially minded tax professional who is excited by the opportunity to develop within a fast-moving investment environment.

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The Opportunity

We are hiring a Tax Assistant Manager — or someone ready to step into an emerging Tax Manager role — to join the OEGen Tax Team. This role reports directly to the Funds & Deals Tax Lead and offers the chance to build a broad international tax career within a growing infrastructure investment platform.

This opportunity is ideal for a professional with around 4–5 years of experience who wants to deepen their technical expertise, strengthen their commercial understanding, and gain hands-on exposure to project and transaction work in an international setting.

You will support a portfolio of OEGen funds and related holding structures across multiple jurisdictions, partnering closely with investment teams, finance, legal, portfolio companies, and external advisors on a diverse range of tax matters.

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What You’ll Be Working On

In this role, you will be involved in a wide variety of tax responsibilities across our international investment structures and transactions.

Key Responsibilities

• Support the management of tax matters across OEGen funds and associated holding structures

• Coordinate international tax compliance with local advisors in multiple jurisdictions

• Assist with tax reporting, tax provisioning, and financial statement disclosures

• Contribute to tax workstreams on acquisitions, refinancings, restructurings, and other strategic transactions

• Review transaction and financing documents from a tax perspective, with guidance from senior team members where needed

• Monitor tax risks and support governance and compliance frameworks

• Collaborate closely with investment, finance, legal, and external advisory teams

• Help improve internal tax processes, controls, and documentation

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What We’re Looking For

We’re interested in candidates who combine strong technical foundations with sound judgement, curiosity, and the drive to keep learning.

Skills & Experience

• Around 4–5 years of experience in corporate tax

• CTA, ACA, or equivalent qualification, or close to qualification

• Background gained in a Big 4 firm, international advisory firm, law firm, or in-house tax team

• Good understanding of tax compliance, reporting, and tax accounting

• Some exposure to international tax matters or cross-border structures would be helpful, though deep specialist expertise is not essential

• Interest in infrastructure, energy, or investment management would be advantageous

• Foreign language skills — especially German, French, Spanish, or Italian — would be useful, though not required

Personal Attributes

• Strong reasoning and analytical skills

• Good commercial awareness

• A proactive and collaborative approach

• Willingness to learn and grow in a broader international tax role over time

This role would particularly suit someone looking to develop into a broader tax management position while working alongside experienced senior stakeholders in a supportive and hands-on team.

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Why Join OEGen?

This is a chance to be part of a collaborative in-house tax team at the heart of an ambitious, international clean energy investment platform.

What Makes This Role Stand Out

• Broad exposure to international investment structures

• Involvement in cross-border transactions and strategic projects

• Opportunity to work with senior stakeholders across tax, finance, legal, and investments

• A platform for building both technical depth and commercial breadth

• A supportive environment designed to help you grow your career

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Why You’ll Love Working Here 💚

A Few Perks Worth Knowing

• Salary: We don’t advertise a fixed figure because we offer flexibility and want to match the right person to the right package. Feel free to ask during your recruiter conversation — we always cover it openly.

• Culture: Octopus Energy Group is known for being a place where people can learn quickly, make decisions, and build meaningful work with real autonomy.

• Recognition: We were recently named the UK’s top company to work for and ranked in the top ten of the Sunday Times Best Places to Work 2024.

• Leadership: We’ve also been recognised as a top 10 company for senior leadership.

• Meaningful perks: We believe your hard work should be rewarded with benefits and perks that genuinely matter.

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Our Hiring Process

If this sounds like the right next step for you, we’d love to hear from you.

Our hiring process typically takes up to 4 weeks, though we’ll always do our best to work around your schedule. Throughout the process, you’ll speak with our recruitment team, and your recruiter will support you at every stage.

If you have any questions before applying, feel free to contact us at talent@octoenergy.com.

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Accessibility & Support

We want to make sure you have the tools, support, and environment you need to do your best. If you need any specific accommodations or adjustments during the interview process, just let us know and we’ll do what we can to tailor the experience to suit you.

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Inclusion Matters

Research shows that some people — including women and underrepresented groups — are less likely to apply unless they meet every single requirement. If this role interests you, we encourage you to apply even if your experience doesn’t match every point perfectly.

At Octopus, we value people who are genuinely decent, honest, and empathetic. Our people are our greatest strength, and the diverse skills and perspectives they bring are central to our success.

We are proud to be an equal opportunity employer. We do not discriminate on the basis of any protected characteristic and are committed to creating an inclusive environment built on fairness and opportunity for all.

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Use of AI in Recruitment

In some cases, we use AI tools to support parts of our hiring process, such as helping review applications or assess responses. These tools are used to help our recruiters manage a high volume of interest — not to replace human decision-making.

Every hiring decision is always made by a real person in our Talent team.

If you’d like to know more about how we use your data, please contact us at talent@octoenergy.com.

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Ready to Apply?

If you’re looking for a role where you can build your international tax experience, contribute to the energy transition, and grow within a high-performing investment platform, this could be the perfect next move.

Apply now and help shape the future of clean energy with Octopus Energy Generation. 🚀