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Job title: Founding Head of Telco Location: London; 4 days in-office, 1 day wfh Reports to: Chief Commercial Officer ___________________________________________________________________________ COSINE AT A GLANCE Cosine is the UK's frontier AI lab for autonomous software engineering — not another coding assistant, but our own models, agent stack, eval harnesses, and product layer. We build our agent tooling entirely in-house and post-train open-source models to deliver reliable, enterprise-grade coding performance in security-critical settings. Our offerings can be used as SaaS, deployed on VPC, on-prem or fully air-gapped. Through this flexability, we are able to service large-scale, highly regulated enterprises and industries including defence, financial service and healthcare. We’re backed by YC and were recently selected for the UK’s sovereign AI programme. The company is at a rare stage: deep technical work, real enterprise pull, and a chance to shape how AI is deployed inside defence, banking, government, and other high-trust environments. ___________________________________________________________________________ MISSION Own Cosine’s telco engagement and GTM motion from founder-led relationship building into a repeatable commercial engine. The role exists to build on Cosine’s existing sovereign AI momentum with telecoms, critical national infrastructure operators, and strategic technology partners, turning senior interest into deep institutional relationships, clearly understood priorities, and qualified commercial opportunities. This is a critical sector-building role: part enterprise sales, part partnerships, part market development, part infrastructure strategy, and part GTM leadership. ___________________________________________________________________________ CORE RESPONSIBILITIES 1. LEAD ENGAGEMENT WITH TELCO OPERATORS - Own Cosine’s day-to-day engagement with priority telco organisations, including national telecoms operators, managed service providers, network infrastructure providers, and telecoms technology teams. - Build on Cosine’s existing traction and reputation across sovereign AI, secure deployment, regulated infrastructure, and AI engineering to create senior routes into the right organisations. - Maintain a clear account map across key telco organisations, including executive sponsors, technology leaders, network engineering teams, enterprise product owners, security stakeholders, procurement teams, and commercial decision-makers. - Move relationships from broad sovereign AI or infrastructure interest into specific, practical areas where Cosine can create value. 2. BUILD MULTI-THREADED SENIOR RELATIONSHIPS - Develop relationships across multiple divisions, business units, and seniority levels in each target account. - Engage CIO, CTO, CISO, Chief Digital Officer, network, platform, engineering, enterprise product, security, procurement, strategy, and commercial stakeholders. - Identify how priorities differ across teams, for example AI compute monetisation, software engineering productivity, customer-facing AI services, secure deployment, network automation, operational resilience, and legacy system modernisation. - Build enough trust that Cosine becomes part of the strategic conversation around telco AI, not just another vendor selling a developer tool. 3. BUILD COSINE’S UNDERSTANDING OF TELCO SOVEREIGN AI PRIORITIES - Run structured discovery across telco organisations to understand what they truly care about in sovereign AI, AI coding, and enterprise automation. - Capture use cases, constraints, buying triggers, objections, deployment requirements, security expectations, procurement routes, partner dependencies, and success metrics. - Translate telco customer signal into internal intelligence for sales, partnerships, product, research, engineering, marketing, and leadership. - Build a sector view of where Cosine has the stronge