At least 1,000 London-based and other UK staff asked management to recognise the Communication Workers Union and Unite after an April vote.
Workers cited Google's new Pentagon agreement, military and surveillance uses of AI, and concerns over Gaza, while warning they could stage protests or "research strikes" if demands are rejected.
The move follows more than 600 employees urging Sundar Pichai to keep AI off classified networks, as investor scrutiny grows after Google dropped its pledge against militarised AI.
Can tech workers' unions force giants like Google to choose ethics over military contracts?
As AI enters the battlefield, can ethical guardrails prevent a new era of automated war?
When AI makes a lethal mistake in combat, who is ultimately held responsible?
Google DeepMind's 2026 Unionization Vote: Over 300 Workers Demand Ethical AI Limits Amid Pentagon Deal
Overview
In April 2026, over 300 Google DeepMind workers in London unionized in response to Google's new Pentagon AI contract involving classified military activities, sparking widespread ethical concerns. This followed earlier protests and firings over the Project Nimbus contract with the Israeli government, which fueled distrust among employees. Despite petitions and an open letter signed by more than 600 staff opposing the Pentagon deal, Google leadership remained silent, prompting the union to prepare research strikes targeting key AI projects like Gemini. The Pentagon's AI Acceleration Strategy and its 'all lawful use' clause limit corporate control over AI deployment, intensifying worker demands for binding ethical commitments, independent oversight, and the right to refuse objectionable work.