Palantir alum
Arnaud Fournier
CTO, OpenAI Deployment Company (DeployCo) at OpenAI
CTO of the OpenAI Deployment Company (DeployCo) since April 2026. He co-founded OpenAI's forward deployed engineering team as its first FDE, after co-founding Bastion. At Palantir he led a commercial cybersecurity business line.
Fournier led a cybersecurity business line on Palantir's commercial side, then co-founded Bastion in 2022 with three other Palantir alumni. He joined OpenAI about two years later as the first forward deployed engineer, ran the function for EMEA and global verticals, and became CTO of DeployCo in April 2026.
At Palantir
- Led commercial cybersecurity business line
- 2020 to 2022
- Paris
Career
- 2020-2022: Palantir, commercial cybersecurity lead
- 2022: Bastion, co-founder
- 2024: OpenAI, first forward deployed engineer
- 2026-now: OpenAI Deployment Company, CTO