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Octopus Energy

Tax Assistant Manager

Octopus Energy

Tax Manager responsible for overseeing tax matters within OEGen's development funds at Octopus Energy Generation. Collaborating with teams on tax compliance and governance across multiple jurisdictions.

Posted 5/27/2026full-timeLondon • 🇬🇧 United KingdomMid-LevelSeniorWebsite

About the role

Key responsibilities & impact
  • Support the management of tax matters across OEGen funds and associated holding structures.
  • Coordinate international tax compliance processes with local advisors across multiple jurisdictions.
  • Assist with tax reporting, tax provisioning, and financial statement disclosures.
  • Support tax workstreams on acquisitions, restructurings, refinancings, and other transactions.
  • Review transaction and financing documentation from a tax perspective, with support from senior team members where needed.
  • Monitor tax risks and support ongoing governance and compliance processes.
  • Work closely with investment, finance, legal, and external advisory teams across the business.
  • Contribute to the continuous improvement of internal tax processes and documentation.

Requirements

What you’ll need
  • Around 4–5 years’ experience in corporate tax.
  • CTA, ACA, or equivalent qualification (or close to qualification).
  • Experience gained in a Big 4 firm, international advisory firm, law firm, or in-house tax team.
  • Good grounding in tax compliance, reporting, and tax accounting.
  • Exposure to cross-border structures or international tax matters is helpful, but deep expertise is not expected.
  • An interest in infrastructure, energy, or investment management is a plus.
  • Foreign language skills (particularly German, French, Spanish, or Italian) would be beneficial but are not required.
  • Most importantly, we are looking for someone with strong reasoning skills, good commercial awareness, and a willingness to learn. This role would suit someone looking to grow into a broader international tax management role over time, working closely with experienced senior stakeholders in a supportive and collaborative environment.

Benefits

Comp & perks
  • 💰 Wondering what the salary for this role is? Just ask us! On a call with one of our recruiters it's something we always cover as we genuinely want to match your experience with the correct salary. The reason why we don't advertise is because we honestly have a degree of flexibility and would never want salary to be a reason why someone doesn't apply to Octopus - what's more important to us is finding the right octofit!
  • 🎉 Octopus Energy Group is a unique culture. An organisation where people learn, decide, and build quicker. Where people work with autonomy, alongside a wide range of amazing co-owners, on projects that break new ground. We want your hard work to be rewarded with perks you actually care about! We were recently named the UK's top company to work for, and we ranked in the top ten in the Sunday Times Best Places to Work 2024. Our Group CEO, Greg has recorded a podcast about our culture and how we empower our people. We’ve also been placed in the top 10 companies for senior leadership
  • 🎁 Visit our UK perks hub - Octopus Employee Benefits

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools
tax compliancetax reportingtax provisioningfinancial statement disclosurestax accountingtransaction documentation reviewtax risk monitoringgovernance processescross-border structuresinternational tax matters
Soft Skills
reasoning skillscommercial awarenesswillingness to learncollaborationsupportive environment
Certifications
CTAACA