Sierra Catalina is CEO of ouroboros, a model-agnostic AI workspace that carries your memory and preferences across models, and builds privacy-first infrastructure for user-owned context. Previously at xAI, Pollen Mobile, and Hotspotty.

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Sierra Catalina is CEO of ouroboros, a model-agnostic AI workspace that carries your memory and preferences across models, and builds privacy-first infrastructure for user-owned context. Previously at xAI, Pollen Mobile, and Hotspotty.

Career

Chief Executive Officer at ouroboros from 2026-01 to Present
Human Data at xAI from 2023-11 to 2024-05 in United StatesWorked with Toby Pohlen, Jimmy Ba, Igor Babuschkin, Elon Musk and Greg Yang.
Director of Marketing and Communications at Pollen Mobile from 2022-07 to 2022-10 in San Francisco Bay Area
Director of Business Development at Hotspotty from 2021-12 to 2022-07 in Lisbon, Portugal
sierracatalina.com

the context layer

a user-controlled contract for moving minimum useful context across models, agents & applications.

Open ↗
github.com

the sovereign agent stack

open protocols for user-owned AI. identity & grants, scoped disclosure, orchestration, portable personalization & receipts. any model, any interface, one mono repo.

Open ↗

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