Rene Mayrhofer resigns as Google director over Project Nimbus and Pentagon AI work. The exit highlights internal tension that could affect Google's push into billion-dollar defense cloud contracts.
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A Google director resigned last week over the company's work with the Israeli military and the Pentagon, according to a copy of his resignation letter reviewed by Business Insider. René Mayrhofer, who oversaw Android security as a director of engineering, said the company had lost its moral compass by building cloud and AI tools for defense clients.
"Proactively harming people is not something that I can or will be involved with," he wrote. Mayrhofer specifically criticized Project Nimbus, a $1.2 billion contract with Israel, and broader Google work with the US Department of Defense.
Mayrhofer's exit is the latest in a series of resignations tied to Google's military work. The debate over the company's role in defense contracts has been a flashpoint since Project Maven in 2018, when thousands of employees signed a petition demanding the company stop a controversial Pentagon drone program. Google later declined to renew Maven but has since taken on other military work, including Nimbus.
The departures come as Google Cloud positions itself as a major provider of AI and cloud infrastructure to government clients, a market valued in the billions. The company is competing for a role in the Joint Warfighting Cloud Capability, a Pentagon contract worth up to $9 billion. Defense deals offer long-term, high-margin revenue but depend on the company's ability to retain engineers willing to support the mission.
Talent retention is a critical factor in performing large government contracts. When key engineers leave over ethical concerns, it can slow delivery timelines or complicate bids. Google has not disclosed whether Mayrhofer's departure affects any specific contract.
Mayrhofer did not respond to a request for comment. A Google spokesperson said the company takes employee feedback seriously and remains committed to its AI principles, which include not using AI for weapons.
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