OpenAI head of safety Johannes Heidecke departs amid reorganization

OpenAI’s head of safety systems, Johannes Heidecke, is leaving the company following an internal reorganization that merges its safety and research teams under a single leader. It’s the latest in a string of high-profile safety departures that have become something of a recurring theme at the world’s most prominent AI company.

Heidecke announced his exit to staff in July 2026, just two years after stepping into the top safety role.

What happened inside OpenAI

The departure came alongside a broader structural overhaul. Chief Research Officer Mark Chen told staff in a memo that safety teams would now report to Mia Glaese, who has been elevated to the newly created position of VP of Research and Safety.

Instead of safety operating as its own distinct pillar, it’s being folded into the research organization. Saachi Jain will serve as interim head of safety systems while the company figures out its next permanent hire.

Heidecke first joined OpenAI back in 2021 as an AI safety analyst. He took over the head of safety systems role in 2024, succeeding Lilian Weng. His work included model alignment, rule-based reward systems, and preparedness evaluations.

He’s not the only safety-focused leader to head for the exit. Andrea Vallone, another figure in OpenAI’s safety apparatus, departed by the end of 2025.

Why safety departures keep making headlines

OpenAI has been through multiple rounds of internal changes affecting its safety and research divisions over the past year. The decision to merge safety under the research umbrella can be read two ways. The optimistic interpretation: safety becomes deeply embedded in everything the research team builds, rather than operating as an afterthought or a separate checkpoint. The skeptical interpretation: safety loses its independent voice and becomes subordinate to the team whose primary incentive is to ship products faster.

Glaese’s expanded title, VP of Research and Safety, suggests the company wants to signal that safety remains a first-class priority under the integrated structure.

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