Chief of Staff

Chief of Staff — Frontier AI (Stealth) London

Up to £150k

We’re working with a fast-growing AI start-up who are building domain-specific training and evaluation for frontier AI labs — bringing real professional judgment from finance, healthcare, and legal into how the next generation of models actually reason.

We’re looking for a Chief of Staff to work directly alongside the founder as a true second-in-command — not a coordinator, but someone who sees everything the founder sees and owns meaningful pieces of the business outright.

This role is not for everyone. It’s fast-paced, high-intensity, and genuinely demands full commitment — including weekends when the moment calls for it. In return: outsized ownership, direct exposure to how frontier AI labs actually build and evaluate their models, and a seat at the table for real strategic decisions.

What you’ll do:

• Act as a true extension of the founder — full visibility, not a filtered subset of it

• Own projects end-to-end, from ambiguous starting points to shipped outcomes

• Take things off the founder’s plate entirely, not just support them

• Work directly on initiatives tied to frontier AI labs

• Move fast — turn decisions into action without waiting for detailed instructions

What we’re looking for:

• Early career in investment banking or top-tier consulting (~2–4 years)

• Followed by real operating experience at a fast-moving startup, ideally founder-facing

• A demonstrated bias to action — comfortable making calls with incomplete information

• Genuine curiosity about how AI models are trained and evaluated

• Full buy-in on the intensity — this is not a work-life-balance role, and we’d rather you self-select out now than six months in

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f you want structure, predictable hours, and clear boundaries, this isn’t the role. If you want real ownership at founder-level intensity, with a front-row seat to how frontier AI gets built — get in touch.