Palantir adds Jon Tester as adviser

Palantir Technologies has hired former Democratic Senator Jon Tester of Montana as an adviser focused on its government services business. The hire was announced on November 9, 2026, as Democrats prepare to take control of Congress and plan to investigate the data analytics firm’s surveillance practices.

Tester has stated that his agreement with Palantir is advisory in nature and not lobbying. The role is described as a non-lobbying advisory position, and he will not be working the halls of Congress on Palantir’s behalf in any formal registered capacity. His focus is on Palantir’s government-services business, giving the company the perspective of a former lawmaker as congressional scrutiny of its public-sector activity increases.

The appointment comes as Democrats in Congress plan to probe Palantir’s surveillance work and as the Senate Finance Committee threatens the company to explain the use of its surveillance tools. Palantir is in Democrats’ crosshairs over its role in government surveillance and its relationships with federal agencies. Tester has said he believes Palantir has a good story to tell and that the company needs to tell it, expressing hope that people will be receptive.

Palantir holds U.S. government contracts funded with $2.3 billion in taxpayer money. In May 2025, more than a dozen former employees criticized a $30 million contract with Immigration and Customs Enforcement that involved designing a surveillance tool to monitor migrant activity. Privacy concerns and political pressure have turned Palantir’s federal work into a central issue for lawmakers.

Jon Tester represented Montana in the U.S. Senate from January 3, 2007, to January 3, 2025, building a reputation on rural issues and veterans’ affairs. Over his 18 years in the Senate, he opposed the USA Patriot Act as the U.S. government’s surveillance powers increased. He later lost his bid for reelection in 2024 to Republican Senator Tim Sheehy of Montana.

Palantir has been accused of aiding mass surveillance, particularly through its work with U.S. government agencies. The company rejects claims that it surveils the public and has stated that it is neither conducting nor enabling mass surveillance of American citizens. For investors, the addition of Tester introduces a political and reputational test to Palantir’s growth story, as the company seeks to preserve federal relationships and maintain confidence in safeguards around its software.