The Democratic National Committee has hired the digital and technology firm Hawkfish, according to two sources with knowledge of the situation, bringing the Michael Bloomberg-founded company on board for the final four months of the 2020 campaign.

The DNC’s decision will be controversial among some progressives, who bristled at the idea of Bloomberg, the former New York City mayor and multi-billionaire, gaining influence within the party. Earlier this month, Joe Biden’s campaign opted against hiring the firm, though the DNC and Biden campaign are working hand-in-hand during the general election.

The nature of the Hawkfish’s contract with the DNC, and what work they’ll specifically do for the committee, was not entirely clear. One source with knowledge of the agreement said it was for a “small data contract.”

Hawkfish, a tech firm founded by billionaire former presidential candidate Mike Bloomberg, has signed on with a pro-Joe Biden super PAC after missing out on working directly with the presumptive Democratic nominee’s campaign.

The super PAC, American Bridge, recently signed a contract with the Bloomberg firm, officials told CNBC.

The PAC has spent millions of dollars on ads on TV and online in support of the former vice president’s bid for the White House. The organization is also well known for its often-unmatched opposition research arm.