Account Manager

We Are Sparta Sparta is the AI leader for commodity trading, home to Leonidas AI, the first operating system for oil and commodity traders. Backed by $42 million in Series B funding led by One Peak, with participation from returning investors FirstMark and Singular, the same investors behind AI leaders like Legora, Dataiku, and Synthesia. Most companies are building a chatbot on top of data. We've built an agent with an actual reasoning layer, grounded in years of proprietary market data and in-house trading expertise nobody else has. We're scaling fast, and it's an exciting time to join. From independents to multinationals, the world's leading commodity teams use Sparta and Leonidas AI to move faster, trade smarter, and stay ahead of the market. At Sparta, you'll be trusted to take ownership, backed by a team who wants you to succeed. AI is how we build here, not just what we sell. Good ideas move fast, and yours could go from staging to production in a couple of hours, whatever department you're in. You'll be challenged, supported, and given room to grow, building the AI that's changing how commodity trading gets done. Your work has reach. From shaping Leonidas AI, to powering smarter decisions for traders around the world, to changing how commodity trading is done. And because we're growing fast, you'll accelerate your career with a level of ownership and impact you simply won't get at bigger, slower-moving companies. The role We’re looking for a London-based Account Manager to own and grow a portfolio of Sparta’s smaller accounts. This is a retention-and-growth role, not a new-logo hunting role: you’ll be the day-to-day commercial owner for a book of existing customers, protecting revenue at renewal and identifying and closing upsell and cross-sell opportunities within it. This is a role for someone a couple of years into account management who wants to progress quickly. You’ll learn directly from highly experienced Account Directors and take on bigger, more complex accounts as Sparta scales. We’re growing fast, and the room to move up comes with it. What You’ll Do • Own a portfolio of smaller accounts, acting as the primary commercial point of contact for each customer. • Build and execute a renewal plan for every account in your portfolio, working to protect and grow existing ARR. • Identify and close upsell and cross-sell opportunities (additional seats, products or commodity verticals) within your existing account base. • Consistently meet retention and expansion targets across your assigned portfolio. • Run regular check-ins and business reviews with customers to track usage, surface risk early, and reinforce the value Sparta delivers. • Keep account and opportunity records accurate and up to date in HubSpot, including renewals pipeline and MEDDPICC qualification. • Partner with Customer Success on onboarding, adoption and usage data to spot expansion and churn-risk signals before they become problems. • Escalate at-risk accounts promptly and work with the Head of Sales on recovery or win-back plans. • Support Account Directors on strategic enterprise accounts as needed, building the experience to take on larger accounts and more senior sales responsibility over time Who You Are • 3+ years’ experience in an account management role, ideally in B2B SaaS, financial data or commodities. • Hands-on ownership of both retention and expansion. You’ve run renewals and closed the upsell and cross-sell yourself, rather than passing growth opportunities to a separate salesperson to close. • Comfortable managing a high volume of smaller accounts at once and prioritising your time effectively. • A confident relationship-builder with strong written and verbal communication skills. • Organised and process-driven, with a working