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Job title: Enterprise Account Executive (Defence)

Location: London; full in-office working as default

Start date: ASAP

Reports to: CRO

Compensation: £75k–£125k base plus commission and equity

Cosine at a glance

• Cosine is an autonomous, on-premise coding agent post-trained on human reasoning data to deliver unmatched software-engineering accuracy, security, and speed for regulated enterprises
• What makes us unique is our in-house ML research lab that post-trains LLMs (e.g. Nova, gpt-oss, Kimi) on proprietary software-engineering reasoning data to dramatically increase their coding accuracy. In 2024 this gave us a world-leading score of 72% on OpenAI’s SWE-Lancer benchmark
• Cosine is now the only available managed product that can be fully air-gapped and deployed on premises, exciting many bulge bracket but extremely risk sensitive and strict enterprises that have rejected all other solutions on the market. We are about to kick off our first live pilots with a defence prime and are now scaling our defence and government go-to-market motion.

The role

As an Enterprise Account Executive for Defence, you will own and close complex enterprise deals across defence primes, government agencies, and national security organisations. You will navigate highly regulated procurement environments and work closely with senior technical, security, and programme stakeholders to turn pilots into long-term production deployments.

This role is ideal for someone who has successfully hunted and closed new logo enterprise deals within defence or government, particularly selling developer tooling, infrastructure, security, or platform technologies into mission-critical engineering teams.