DHS Final Rule Ends Duration of Status, Prompting Brain Drain of Foreign Scientists

(UNITED STATES) — The Department of Homeland Security submitted a DHS Final Rule to the Office of Management and Budget on May 5, 2026 that would replace the long-standing Duration of Status policy for F-1, J-1, and I visa holders with a fixed admission period capped at four years, adding new extension filings, fees and biometrics for researchers whose work runs longer.

The filing lands as foreign scientists report mounting delays in visa processing, shrinking federal research support and fewer options to remain in U.S. labs. Together, those shifts have fed a broader brain drain toward Europe and Asia, where governments and institutions have opened new recruitment channels for researchers leaving American universities and laboratories.

Under the rule, scientists in PhD tracks or research programs that extend beyond four years would need to file Form I-539 with U.S. Citizenship and Immigration Services, pay new fees and complete biometrics to seek more time in the country. That replaces the decades-old Duration of Status, often written as D/S, which allowed many students and exchange visitors to remain for as long as they maintained the terms of their program.

DHS paired that move with a fresh review of post-study work authorization. In a formal letter to Senator Eric Schmitt dated January 9, 2026 and made public in late February, Secretary Kristi Noem said the department was conducting a comprehensive review of Optional Practical Training and STEM OPT.

“DHS is reevaluating whether the current regulatory framework—including the scope and duration of practical training—appropriately serves U.S. labor market, tax, and national security interests and remains aligned with congressional intent,” Noem said. She also cited a “significant increase in the number of foreign student visa holders engaged in practical training programs and the potential risks and challenges” regarding U.S. worker displacement and fraud.

USCIS added another obstacle on January 1, 2026, when it put in place a hold-and-review policy for pending immigration benefit requests filed by nationals from 39 countries named in recent travel and security proclamations. Universities and research institutions have tied that policy to longer adjudication times for international researchers waiting on extensions, changes of status and related approvals.

Those immigration steps come as Washington cuts deeper into the research system itself. The 2026 federal budget proposal called for a 40% reduction for the National Institutes of Health and a 55% reduction for the National Science Foundation.

Since January 2025, about 8,000 research grants have been canceled or frozen, and nearly 25,000 federal scientists have lost their positions. The funding losses and the visa changes reinforce each other inside academic labs: principal investigators lose grants, departments slow hiring, and foreign researchers face added uncertainty about whether they can finish projects already underway.

That mix has altered the incentives for graduate students, postdoctoral researchers and visiting scholars who once treated the United States as the default destination for advanced training. A Nature poll of 1,600 researchers found that 75% were considering leaving the U.S., while applications by U.S.-based scientists for jobs abroad rose 32% in early 2026 compared with 2025.

The numbers are striking because foreign-born workers remain central to American science and engineering. As of May 2026, 22% of all U.S. STEM workers were foreign-born, and the country faces a projected shortage of 67,000 semiconductor jobs by 2030.

DHS has framed the shift as part of a stricter merit-based approach that favors immediate commercial or defense impact, including work in AI and biotech, over basic research with a longer timeline. In practice, that places extended doctoral work, early-stage lab science and exchange-based research programs under more scrutiny at the same moment federal support for those fields is contracting.

Researchers on J-1 and F-1 visas now face more mid-program immigration decisions moving from university officials to USCIS adjudicators. What campus designated school officials once handled through status maintenance now increasingly turns on federal filings, fee payments and processing times that can interrupt work already planned around grant calendars and academic terms.

The rule also narrows flexibility inside graduate study. F-1 graduate students are now largely prohibited from changing programs or degree levels after enrollment, a shift that can limit ordinary moves between departments, research tracks or academic plans when a grant disappears or an adviser leaves.

Post-completion timing has tightened as well. The F-1 grace period after finishing a program has been cut from 60 days to 30 days, leaving less time to secure another lawful status, arrange onward travel, or shift into work authorization if an employer is willing to sponsor a different visa.

That compressed window matters beyond campus administration. Scientists finishing a degree may need to decide within a month whether to depart, file another request, or accept an offer overseas, while laboratories lose continuity on experiments that often depend on highly specialized personnel trained over several years.

Outside the United States, governments have moved quickly to capture that pool of talent. The European Commission launched the “Choose Europe for Science” program with €500 million in Super Grants aimed at attracting researchers displaced from U.S. institutions.

Austria created the APART-USA fellowship, which offers four years of guaranteed funding for scientists leaving American institutions. China has continued expanding talent recruitment programs that target high-profile U.S. researchers whose federal grants were frozen, giving laboratories abroad a direct opening to hire teams that had expected to build careers in the United States.

The competition is not limited to elite faculty. Early-career researchers often move first because they face the sharpest collision between immigration timelines and research timelines: a four-year admission cap, a pending extension, a grant that has been frozen, and a short post-study grace period can all hit within the same year.

That dynamic also reaches visa categories beyond traditional academic pathways. The rule covers I visa holders as well as F-1 students and J-1 exchange visitors, widening the practical effect of the change across institutions that depend on international mobility. The inclusion of J-1 researchers is especially sensitive because many exchange programs run on schedules that do not map neatly onto a fixed admission period.

Although the article’s central pressure point is immigration, travel rules and cross-border mobility remain part of the strain. Researchers attending fieldwork, conferences, collaborative lab visits or short-term assignments in Europe already juggle Schengen entry limits, consular wait times and reentry risks; a system built around fixed U.S. admissions and repeated extension filings adds another administrative layer to work that often spans multiple countries.

Universities, hospitals and federally linked labs have long relied on foreign researchers to fill pipelines that domestic hiring alone does not cover, especially in engineering, biomedical science and semiconductor research. When immigration timing becomes less predictable and grant support weakens at the same time, institutions lose their ability to promise a stable path from doctoral training to postdoctoral work to permanent research roles.

The administration’s review of OPT and STEM OPT has added to that uncertainty because those programs often bridge the period between study and longer-term employment authorization. Noem’s language tied the review directly to labor market, tax and national security interests, signaling that practical training itself, not only student admission, is under active reassessment.

Foreign scientists and universities tracking the changes can monitor the [USCIS Newsroom](https://www.uscis.gov/newsroom), the [DHS rulemaking portal](https://www.reginfo.gov) for RIN 1653-AA95/1653-AA97, and the [Federal Register notice](https://www.federalregister.gov) for the Duration of Status proposal. Those records now sit at the center of decisions shaping whether the next generation of researchers remains in U.S. labs or builds its work elsewhere.