Key Account Manager in London

Location: Hammersmith, London (Hybrid working, 3 days a week in the office)

Hours: Full-time, 35 hours per week (core working hours 10am–3pm)

Why this role matters

At Brook Green Supply, we’re an independent Industrial & Commercial (I&C) energy supplier helping businesses make smarter, more sustainable choices about their energy use. We work with some of the UK’s largest and most complex energy consumers, providing tailored supply contracts, risk management and expert guidance across electricity and gas.

You’ll report to the Head of Key Accounts, you will play a crucial role in building and nurturing long-term relationships with our strategic partners. Your responsibilities will include overseeing complex tender processes, making strategic pricing decisions, and utilising your sales acumen to drive financial growth through successful contract renewals, upselling opportunities, and key account management. Collaborating closely with internal teams, you will ensure that the renewal process is seamless, from pre-sale support to post-sale delivery. This position offers an exceptional career opportunity for personal development and progression within the energy sector.

What you’ll do

You’ll be the key contact for some of our most significant accounts, ensuring long-term satisfaction, retention, and growth through strong commercial management and exceptional service.

• Manage and renew key accounts with energy consumption above approximately 50GWh, encompassing both electricity and gas customers.
• Oversee and coordinate complex tenders from enquiry to deal acceptance, ensuring efficient and professional handling of bids to secure contract renewals and negotiate favourable terms for Customers, TPIs and Brook Green Supply.
• Determine pricing and deal structures to optimise propositions and drive growth. Collaborate with the Trading Desk team to structure appropriate proposals and products, tailoring solutions for key accounts.
• Monitor account performance and identify opportunities for growth and upselling, explore & develop new products and opportunities.
• Achieve targeted financial growth through retention and upsell/cross-sell, significantly contributing to the company's revenue and market share.
• Manage internal stakeholders in Operations, Finance, and CRM to ensure high levels of overall customer experience and satisfaction.
• Drive innovation to enhance the customer offering, staying updated on market trends and changes in the energy industry, acting as an industry expert for customers and enhancing the customer proposition.

Skills Required

• Strong interpersonal skills, confident, credible, persuasive, and a collaborative team-player.
• Results-oriented and ambitious.
• High attention to detail whilst meeting multiple and competing deadlines.
• Fast learner, open to acquiring new skills.
• Excellent written and verbal English communication and analytical skills, with the ability to translate complex information into a professional and clear format.
• Customer-centric mindset with a focus on innovation, value creation, and execution.
• Holds a Full Driving License.

Experience Required

• Demonstrable experience in similar roles with tangible delivery.
• Extensive experience in UK I&C energy markets. Specifically, knowledge and experience of the mechanisms/management of flexible supply products.
• Proven experience in key account management and commercial negotiations.

What we’re looking for

We want someone who can blend commercial insight, energy market expertise, and relationship-building to deliver measurable impact.

A note from us

Even if you don’t tick every box, we’d still love to hear from you. Brook Green Supply is committed to equal opportunities, fairness, dignity, and respect for all employees and applicants. We welcome diversity and believe it’s key to building a stronger, more innovative team.