In a rare public rebuke from a departing official, **Marc Rosenblum**, the executive director of the Office of Homeland Security Statistics (OHSS) and a deputy assistant secretary at the **Department of Homeland Security (DHS)**, has resigned, expressing strong disapproval of the current administration's direction. Rosenblum, who oversaw a broad spectrum of data from cybersecurity intrusions to immigration enforcement statistics, announced his departure via a **LinkedIn** post over the weekend. "I’m thrilled to end my relationship with the current administration," Rosenblum stated. "Between the war on immigrants, the war on feds, and the war on facts (not to mention the crazy war in Iran and the brazen corruption), I just need a change." ### A Career Dedicated to Data Transparency Rosenblum's tenure included service in both the first Trump and Biden administrations. He initially led DHS's office of immigration statistics before expanding his role in 2023 to oversee data for the entire department. His office was tasked with the complex challenge of consolidating data from 22 disparate component agencies within DHS. "He had one of the most interesting charges at DHS," a former colleague told **WIRED**. "There's 22 component agencies, and so there are 22 different ways of aggregating data that were just completely siloed." Upon taking on his department-wide role, Rosenblum promised greater transparency, telling **Federal News Network** in November 2023, "We’ll begin releasing data more quickly, with greater granularity and covering a broader scope of DHS activities." ### The Erosion of Public Data However, the commitment to transparency appears to have faltered. The OHSS website, which provides data on **ICE** detentions, Border Patrol encounters, and DHS repatriations, has not been updated since February 11, 2025. Information subsequently obtained, often through **Freedom of Information Act (FOIA)** lawsuits, has been criticized by analysts as spotty and unreliable. **David Bier**, director of immigration studies at the **Cato Institute**, expressed concerns about this lack of public accountability. "There’s no accountability, no way to assess, no public understanding about what’s really going on that is not curated by a press release from the agency," Bier told **NOTUS** in November. ### Official Response and Underlying Tensions In response to Rosenblum’s resignation and his critical comments, a DHS spokesperson stated, "People are always welcome to their opinion—that doesn't make it right or factual. We will not comment on personal decisions." Rosenblum's LinkedIn post also praised his former colleagues, noting the challenging environment they operate in: "My OHSS co-workers are outstanding career federal civil servants. They are smart, mission-focused experts who produce high quality results in a challenging and often hostile work environment." **Luis Miranda**, a former top DHS spokesman during the Biden administration, echoed the sentiment, telling **WIRED**, "The Trump administration has governed by silencing or ignoring facts and information they believe doesn’t line up with their extreme rhetoric, and that has damaging implications, so it's no surprise career officials whose job is transparency are unable to do those jobs." The resignation underscores significant tensions within the DHS regarding data transparency and the public's right to information, particularly on sensitive immigration and security matters.