Senior Manager, Data Center Design

Job description

**Company Overview:** Radiant is redefining how AI infrastructure is built. We design and operate AI-native cloud platforms engineered for sovereignty, performance, and scale. Our infrastructure powers GPU-native workloads, multi-tenant control planes, and high-performance AI systems designed for the most demanding environments. We are not building a generic cloud. We are building purpose-built AI infrastructure — from powered land, to compute, to software. As we scale, we're building this organisation from the ground up. We're looking for people who'd rather build the playbook than inherit one — who are comfortable doing the work themselves as well as directing others, and who can adapt as fast as our strategy does. This is a startup model: attitude and adaptability matter more to us than years of experience or the size of team you've previously managed. This is a cross-functional role requiring strong technical, commercial, and delivery capabilities, with exposure to executive stakeholders and EPCs, design consultants, OEMs, and every regional Project Director relying on one consistent design standard. **What You'll Do** You'll set and personally hold the line on Radiant's data center design standard for electrical, mechanical, civil and architectural design across every live project. In the early stages, you'll be doing a meaningful share of the engineering yourself, not just reviewing it. **Key Responsibilities** **Design** - Write and maintain the electrical, mechanical, civil and BIM design standards yourself - there isn't an existing standard to inherit. - Personally review and mark up design packages from consultants and contractors, not just sign them off. **Hands-on delivery** - Get into the detail on switchgear, cooling strategy (air and liquid) and structural design for GPU-density loads. - Sit in design workshops and RFI resolution directly with EPCs and consultants - you're expected to be in the room, not one step removed. - Write technical requirements and personally review technical responses from suppliers and contractors. **Team build** - Build out electrical, mechanical, civil and BIM leads as the portfolio grows - but expect to be the most senior technical resource on more than one project at a time in year one. **What You Bring:** - Attitude matters more to us here than number of years of experience. - Strong hands-on design experience in electrical or mechanical engineering for data centres or similarly complex mission-critical facilities. - Comfort producing or heavily marking up design output yourself, not just directing others who do. - Working knowledge of high-density GPU cooling (air and liquid) and power distribution/redundancy topologies. - Ability to set a standard from a blank page - you won't be handed one. - Confidence pushing back on consultants and EPCs directly on technical substance. - We care much more about how you think through a design problem than the number of years on your CV. - Engineering degree (mechanical, electrical, or related discipline). **Preferred Skills (Nice to Have):** - Experience designing for both European and US markets and codes. - Exposure to liquid cooling (DLC/CDU) design. - Chartered engineer status or equivalent, though not required. **Qualities we look for:** - **Set the standard:** Every single day, you spot opportunities to constructively shake things up. - **Inspire the change:** There's no blueprint for the future. You'll embrace challenges and change. - **You're real and you're true to yourself:** We cherish and celebrate diversity so you'll feel right at home whoever you are and whoever you're talking to, you treat everyone the same. - **Get stuck in:** You'd rather be building than overseeing. Our strategy will keep evolving, and so will you — attitude and adaptability matter more to us than a fixed playbook or a big team behind you.