The posting
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 knowledge of CRM and AI tools.
• Genuinely curious about commodities and energy markets, with a real appetite to learn.
• Resilient and proactive, comfortable working autonomously in a fast-paced, high-growth environment.
Nice to haves
• Prior exposure to commodities, energy markets, or financial/data services.
• Experience with MEDDPICC or another value-selling framework.
• Familiarity with HubSpot and Claude.
• An additional European language.
WHY JOIN SPARTA?
At Sparta, our culture is built on innovation, collaboration, and high performance. We thrive in a fast-paced environment where initiative is celebrated, challenges are embraced, and impact is rewarded.
• Equity in a high-growth, VC-backed company
• $42M in Series B funding — strong market traction and investment
• Early-stage growth — build your career as we scale
• Market-leading product — we are redefining commodity trading intelligence
• Top-tier tools and technology to support your success
WHAT'S THE CULTURE LIKE AT SPARTA?
At Sparta, our culture isn't just a set of values on a wall — it's how we work. We embrace a dynamic environment where initiative is celebrated, challenges are met head-on, and innovation thrives. You'll collaborate with people who are passionate about our mission and committed to building outstanding products and outcomes for our customers.
THE SPARTA CODE
Understanding is non-negotiable
Understanding leads to believing. Believing leads to winning.
The 'why' is the difference between compliance and conviction. Before we execute, we ask: why does this matter, who does it serve, what changes if we win? People who understand the mission don't need to be managed.
Ask for forgiveness, not for permission
Most decisions are reversible. Most fears are not.
90% of decisions are reversible. Make them, ship, iterate. Perfection is the enemy of efficiency. Bias for action means moving before you have all the answers, but it isn't recklessness. The rule: tell the rest of us what you did, what changed, what you learned.
Fall in love with the problem
The mission wins. Your idea doesn't have to.
Solutions flatter our ego. They feel like progress. But solutions without problems are opinions, and opinions don't move customers, markets, or teammates. The goal is to find what's true, not to win the room. If your idea gets killed because a better one comes along, that's the system working.
It's your fault. Lucky you.
If it's on you, it's in your control.
True ownership sounds harsh until you feel how liberating it is. If every problem is yours, you stop spending energy on who to blame and start spending it on how to fix it. Effective leaders default to 'it's on me'. Not out of guilt, but out of agency.
Conflict is a gift
Honesty is an expression of care.
Withholding feedback is choosing comfort over growth, yours and your colleague's. Staying silent deprives others of the chance to learn. We challenge openly and with positive intent. Done with care, this builds trust. Done with ego, it destroys it.
Sparta Commodities is proud to be an equal opportunity employer and promotes diversity within its workforce. We are determined that no-one will ever receive less favourable treatment on the grounds of gender, age, disability, religion, belief, sexual orientation, marital status, race, veteran status or any basis covered by appropriate law.
