Tom Krause, a software executive, is the Treasury Department’s fiscal assistant secretary with access to a system that disburses government funds and includes Americans’ personal information.

Tom Krause, a Silicon Valley executive with ties to DOGE, will become the fiscal assistant secretary of the Treasury Department, the people said. He replaces David A. Lebryk, who resigned after objecting to Krause’s demands to stop payments on foreign aid — a measure Lebryk resisted as illegal.