Assistant Treasurer in London

A bit about Field: Field is an international builder, owner, operator, of renewable infrastructure. Our Founder and CEO is a successful entrepreneur who previously co-founded a green energy supplier. We have robust pipelines of BESS projects across the UK, Italy, Spain, and Germany - and strong financial backing. Our most recent fundraise was a £200 million investment from CVC DIF Capital Partners. This will support our mission to grow internationally, and ultimately to build and develop a robust global BESS portfolio.

The role: This is a senior, high-impact hire that will elevate the capability of Field's Treasury function. Reporting directly to the Group Treasurer, the Assistant Treasurer will serve as a lead on infrastructure debt finance management, trade finance solutions, insurance, and derivative execution across the group. The role has supervisory responsibility within the team and is expected to either be established or develop into a number 2 within Group Treasury. This role is suited to an established Senior Treasury Manager or Assistant Treasurer level candidate.

The successful candidate will combine strong technical expertise in project and infrastructure finance with hands-on experience executing complex trade finance instruments, surety bond lines, and ISDA-documented hedging programmes. This is a role for someone who can operate at both strategic and transactional level, and who is energised by the pace and complexity of a growing European infrastructure platform.

Key Responsibilities

• Infrastructure & Project Finance
  • Lead the day-to-day management and compliance monitoring of project finance and secured debt facilities across the group's UK and European asset portfolio.
  • Working with the Debt and Structured Finance Manager, oversee and develop the group's debt financial model, including maintaining base cases, scenario analysis, and covenant headroom reporting.
  • Support and lead on new debt raises, refinancings, and facility amendments - coordinating with lenders, legal advisors, and internal stakeholders from mandate through to close.
  • Manage relationship with project finance lenders, monitoring agents, and technical advisors across the portfolio.
  • Ensure robust debt compliance processes, including preparation of compliance certificates, drawdown requests, and lender reporting packs.
• Surety Bond & Trade Finance
  • Own and manage the group's surety bond programme end-to-end: negotiating and executing new bond lines, administering the existing portfolio, and managing relationships with surety providers.
  • Identify opportunities to optimise bonding structures, reduce costs, and increase capacity in line with the group's development pipeline.
  • Lead negotiations on trade finance facilities, including structuring, documentation, and execution in coordination with banking counterparties and legal counsel.
  • Work with project and construction teams to ensure bond obligations are met on time and within facility limits.
• Hedging & Derivative Execution
  • Lead the negotiation, documentation, and execution of ISDA Master Agreements and Credit Support Annexes (CSAs) with banking counterparties.
  • Execute interest rate hedging programmes in connection with project finance facilities, including swaps, caps, and collar structures.
  • Execute FX hedging strategies across group entities, using forwards and options to manage currency exposures.
  • Support the development of commodity hedging strategies (power, battery input materials) in conjunction with the Group Treasurer.
  • Maintain ISDA documentation register and monitor CSA exposure, ensuring margin calls and collateral obligations are managed effectively.
• Insurance
  • Own the group’s insurance programme, acting as the primary internal point of contact for all insurance matters and the principal relationship manager with external brokers.
  • Work closely with brokers to ensure adequate and appropriate coverage is maintained across all operational and construction-phase assets, including property all-risk, construction all-risk (CAR/EAR), business interruption, public and employers’ liability, and directors’ and officers’ (D&O) policies.
  • Lead the annual renewal process end-to-end: coordinating data collection across project, legal, and finance teams; reviewing coverage adequacy and policy terms; benchmarking premiums; and ensuring renewals are executed on time and within budget.
  • Manage the transition of assets from construction-phase to operational insurance programmes, working closely with project delivery teams to ensure seamless coverage handover at practical completion.
  • Ensure insurance requirements under project finance facility agreements are met and documented, and that lender-side insurance conditions are tracked and satisfied throughout the life of each project.
• Team Leadership & Treasury Management
  • Coordinate debt and structured finance management projects, managing outputs and driving quality across modelling and facility management workstreams.
  • Support the Group Treasurer in developing treasury policy, risk appetite frameworks, and group-level treasury governance.
  • Assist Core Finance with treasury accounting, hedge accounting designations, and disclosure requirements under IFRS 9.
• Operational & Cash Management
  • Oversee day-to-day treasury operations, including cash management, short-term investments, and group liquidity monitoring.
  • Support international banking expansion, including account establishment and KYC for new entities across European markets.
  • Maintain and develop counterparty credit risk monitoring across banking, insurance, and trading counterparties.

Skills, Knowledge and Expertise

A bit about you: You are passionate about renewable energy and genuinely curious about the world of energy storage. You thrive in a fast-moving environment where every day brings new challenges, and you’re excited by the idea of being part of a business that’s scaling up quickly. You take ownership of your responsibilities and communicate progress and solutions effectively to managers and stakeholders. You have a strong sense of accountability and aren't afraid to make key decisions or push projects to completion. Your proactive, organised approach keeps you a step ahead, anticipating challenges and taking action to stay on track. When obstacles arise, you remain calm, focused, and committed to delivering results. As a humble, hands-on team player, you know that collaboration is key to success in a growing, dynamic company. You love working with people from all levels of the business, and you are just as comfortable engaging with senior management as you are rolling up your sleeves and diving into the details with your team. You thrive under pressure when it arises, multitasking like a pro and keeping your cool as you juggle multiple projects at once whilst delivering to tight deadlines. Whether you are negotiating with business partners or troubleshooting an issue, you bring creative problem-solving skills and a positive attitude to every situation. You are a natural communicator - clear, confident, and engaging - whether you are explaining complex financial details or collaborating with a wide range of stakeholders. Your negotiation and collaboration skills help bring out the best in your team and partners, and you’re always focused on finding solutions that move projects forward. Above all, you are resourceful, solutions-driven, and ready to make an impact in a company where innovation and teamwork are at the heart of everything we do.

Essential experience and skills we look for:

• Significant experience in a treasury or structured finance role within infrastructure, energy, project finance, or a related capital-intensive sector.
• Proven track record in the execution and management of project finance or secured debt facilities, including compliance and lender management.
• Direct experience negotiating and executing ISDA Master Agreements and CSAs; practical knowledge of IR, FX, and/or commodity derivatives.
• Hands-on experience with surety bond lines or trade finance facilities, including documentation and provider relationships.
• Strong financial modelling skills, with experience building or maintaining project finance/debt models in Excel.
• Excellent communication and stakeholder management skills; comfortable presenting to senior leadership, lenders, and external advisors.

Preferred experience and skills we look for:

• Background in energy transition, renewables, or battery storage infrastructure.
• Experience in a scale-up or growing business where processes are still being built; comfortable with ambiguity and a hands-on approach.
• Familiarity with hedge accounting under IFRS 9.
• Professional qualification: ACT (AMCT/MCT), CFA, ACA/ACCA/CIMA, or equivalent.
• Leadership experience: managing or mentoring junior team members.

Benefits

Why join us? Genuine impact: You will actually be building and operating the renewable infrastructure we need to reach net zero. This is not a green CSR initiative, but a company that is taking a leading role in building one of the critical solutions to a generational problem. Make things happen: We are still an early stage start-up, and you will have significant accountability to make things happen from day 1. You will have a lot of autonomy, will learn quickly, and be given a LOT of room to grow. Define a new industry: The energy market is in a paradigm shift right now, evolving at a breathtaking pace, and you will play a leading role in defining how that market evolves and innovates over the next few years. Exceptional, diverse team: We are an eclectic team with varied backgrounds. We have experience scaling billion dollar tech start-ups, building energy companies, as well as deep specialisms in the energy markets. You will learn from and work with a bunch of fun, curious, and entrepreneurial people that really want to make an impact.

Diversity & inclusion

Diverse teams make better teams. Field is committed to creating a diverse and inclusive environment which is as representative as possible of our society. All qualified applicants will receive consideration for employment without regard to age, disability, gender reassignment, marriage/civil partnership pregnancy/maternity, race, nationality, religion or belief, gender, political beliefs and sexual orientation.

Benefits

We’re offering a competitive compensation package, including participation in our growth share scheme which rewards all employees for the growth of the business. Other benefits include:

• Up to 10% Company wide bonus based on company performance.
• Hybrid working (blend of home and office working to suit individual needs).
• £2,000 per year to spend on your professional development.
• Private medical cover with Bupa from day one with the option to add family members.
• Company Pension with 8% Contribution.
• Enhanced parental leave, for all new parents: 6 months fully paid primary carer leave, 3 months fully paid secondary carer leave, 10 days fully paid leave for fertility treatment.
• Fun co-working office space in Shoreditch, London.
• 1 month work from anywhere, for those with a travel bug.
• 1 day green leave to do something good for the environment.
• Free lunch once a week - a great way to get to know people in the wider team.
• Dog-friendly office, feel free to bring your pooch along.
• Spill: our mental health benefit allowing every Fielder access to equal and unrestricted therapy and resources.
• Regular, optional team socials designed to be inclusive for everyone (not just the pub goers!).
• Birthday carbon offset: a gift from Field to the world to celebrate your birthday.