Account Executive, Frontier AI

About CobaltCobalt helps frontier AI labs and enterprises evaluate and fine-tune their AI models and build the data behind them. We work with domain experts, including scientists, engineers, clinicians and other specialists, to capture how they reason through hard problems, and we turn that expertise into proprietary datasets, evaluations, benchmarks and reinforcement learning environments.About the roleWe are looking for an Account Executive with a strong record of closing large, complex AI deals with frontier AI labs and sophisticated enterprises. You will own Cobalt’s most strategic accounts, working with research, product, engineering and data leaders to find where expert data, rigorous evaluation and targeted fine-tuning can make their models measurably better.This is a senior, consultative and technical sales role. You will lead opportunities from first conversation through scoping, proposal, negotiation and expansion, and you will play a central part in building how Cobalt sells. The strongest candidates will be comfortable selling emerging technology where the customer problem is complex, the solution has to be shaped collaboratively, and there is rarely an off-the-shelf playbook.What you’ll doOwn and grow a portfolio of strategic accounts across frontier AI labs and enterprisesBuild executive-level relationships with research, engineering, product and data leadersUnderstand customers’ AI roadmaps and identify where Cobalt can improve how their models are evaluated, trained and deployedSell model evaluations, benchmarks, reinforcement learning environments, fine-tuning engagements and the proprietary expert datasets behind themLead discovery, scoping, proposals and commercial negotiations on high-value, multi-stakeholder dealsWork closely with Cobalt’s research, technical and expert teams to design solutions around customer requirementsTurn initial projects and pilots into multi-year, expanding customer relationshipsHelp define Cobalt’s sales process, pricing, messaging and commercial modelShare what works with the rest of the sales team and help shape how we hire and onboard future account executivesWho we’re looking forYou may be a strong fit if you have:A sustained track record of closing large AI, machine learning, data or technical infrastructure deals with frontier AI labs or enterprise customersExperience owning complex, high-value sales cycles with multiple technical and executive stakeholdersExperience selling to technical buyers such as AI and machine learning leaders, engineering teams, data science teams or product leadersThe ability to understand technical customer problems and translate them into commercial opportunitiesStrong discovery, relationship-building and negotiation skills, including negotiating directly with executives and procurementComfort selling in emerging categories where the solution may need to be developed alongside the customerStrong commercial judgment, the ability to operate independently, and an interest in helping build a sales organization from an early stageGenuine interest in how advanced models are trained, evaluated and deployedExperience selling generative AI, AI infrastructure, data platforms, model development tools, evaluation tooling or AI services is particularly relevant. Why Cobalt?AI systems are becoming more capable, but deploying them where mistakes matter requires better data, deeper domain expertise and rigorous evaluation. Cobalt is building that layer.You will join at an early stage, work directly with the founding team, and have significant ownership over how we build our customer base and commercial organization.