Amazon has opened an internal investigation into three engineers who criticized the company’s plans to build more AI data centers during recent Seattle City Council hearings on a proposed one-year moratorium for large data center projects.

The engineers spoke before the council in early June, raising concerns about Amazon’s commitment to spend $200 billion this year on AI infrastructure while simultaneously conducting massive layoffs affecting 30,000 workers. They urged the city to add renewable energy requirements and labor protections to new data center regulations.

Amazon’s response was swift. The company told media outlets that by testifying before the council, the engineers may have “spoken in their capacity as Amazonians” rather than as private citizens. A spokesman said Amazon was investigating whether the workers violated company policy requiring approval before employees represent themselves as company representatives in official settings.

The engineers’ union, the Amazon Employees Coalition for Justice, filed a civil rights complaint against the company under a Seattle ordinance that prohibits discrimination based on political ideology, religion, race, age, and other protected categories.

The legal theory is straightforward: if Amazon is punishing workers for expressing political views about company policy in a public forum, it violates local law. Whether a city law protecting political speech can prevail against a company’s contractual policies with its employees remains an open question.

The tension highlights a broader conflict within tech companies. Executives pursue AI expansion as critical to long-term competitiveness. Employees worry about layoffs, energy consumption, labor conditions, and the environmental impact of massive compute infrastructure. When those concerns collide with corporate strategy, employees who speak up sometimes face retaliation.

Amazon is not unique in facing such friction. But the scale of Amazon’s AI spending and the visibility of its layoffs make this particular dispute a test case for how companies will handle internal dissent on major strategic decisions.