How physicians trained outside the US build clinical research careers, and the realistic routes in. Written for foreign trained doctors weighing what to do next.

In this file:

Dr. Idris practiced for 9 years before he moved. He had run a ward, taught residents, and sat with more families on the worst day of their lives than he could count.

His first job in clinical research had the word assistant in the title.

He took it, and 2 things were true at once. It was a real demotion in status and it was not a demotion in usefulness, because on his third week he was the only person in the room who recognized that a reported adverse event was almost certainly a drug interaction rather than disease progression, and he said so, and he was right.

Most of the confusion about whether a foreign trained physician can work in clinical research comes from treating one question as though it were 3. It is 3, and they have different answers.

Gate 1, FDA regulation. Under 21 CFR 312.3, an investigator is the individual who actually conducts a clinical investigation, the responsible leader when it is run by a team. A sub investigator is "any other individual member of that team." That is the entire definition. It says nothing about licensure, nationality, or where you went to school.

FDA is more explicit still in its own guidance on Form 1572, which states that "the regulations do not require that the investigator be a physician," and advises that where an investigator is not a physician, a qualified physician should be listed as a sub investigator.

ICH GCP takes the same line. In E6(R3), the version now in effect, section 2.1.1 says the investigator should be qualified by education, training and experience to take responsibility for the proper conduct of the trial. Qualified by education, training and experience. Not by jurisdiction.

Gate 2, state law. This is the gate FDA never touches. Licensing the practice of medicine is a state function, not a federal one, and each state decides who may lawfully perform acts that count as practicing medicine within its borders. Whether a specific protocol procedure crosses that line is a question of state law, not of FDA regulation. FDA's silence on licensure is not permission from your state.

Gate 3, the employer. Sites credential their own staff. Sponsors write requirements into contracts. A CRO writes a job posting. None of that is law, and all of it is real. When a medical monitor posting says a US license is required, that is that company's hiring policy, and it is worth knowing which of your obstacles are statutes and which are somebody's preference, because only one of those is negotiable.

Here is the useful map. None of the following roles is defined or licensed under FDA regulation, and no regulation names a credential for any of them.

Medical monitor. The sponsor side physician who reviews safety data, answers eligibility questions from sites and makes medical calls on a study. Employers often want a medical degree. Requirements beyond that are company policy.

Drug safety or pharmacovigilance physician. Assessing adverse events, causality and expectedness. Worth noting exactly what the regulation does and does not do here: 21 CFR 312.32 tells a sponsor what to report and how fast, including the 15 calendar day and 7 day clocks. It says nothing about who performs the medical review or what they must hold to do it. That is the sponsor's staffing model.

Medical writer. Protocols, clinical study reports, investigator brochures, publications. Clinical training is a genuine advantage, and nothing in this role is licensed.

Clinical scientist. The person who owns the scientific content of a study, sitting between the medical monitor and operations.

Clinical research associate. Monitoring sites. Physician training is not the usual route, and it is not a barrier either.

Data manager. Building and cleaning the database, writing edit checks, running the query process described in Issue 12.

Sub investigator at a site. This one is the exception in the list, because it is the one where gates 2 and 3 bite. FDA's own definition puts no license on it. Your state and your site will have views.

What transfers, and transfers immediately:

Clinical judgment about whether an event is drug related or disease related. Recognizing an eligibility criterion that will never enroll in the real world. Reading a protocol and seeing where the assessment schedule collides with how a clinic actually runs. Talking to a frightened person about a decision they do not want to make. That last one is genuinely scarce in this industry, and it does not have a certificate.

What does not translate, and is fixable:

The regulatory frame, which is US specific and learnable in weeks, not years. The electronic systems, which are learnable in days. GCP itself, which is a course and a certificate with a version number on it, as Issue 13 covered. The vocabulary, which is the thing that makes an interview go badly for someone who knows more medicine than the interviewer. If you want the history behind why these rules read the way they do, our Version History page tells it.

What does not translate and is not about you at all: a CV that a US screening process cannot parse. Titles do not map. A registrar is not a resident. A consultant is not an attending, exactly. A hiring manager scanning 200 applications is pattern matching, and an unfamiliar pattern gets read as an unknown rather than a plus. That is a formatting and translation problem, and it is worth as much of your effort as any exam.

For anyone weighing research work against going through US residency, it helps to see the actual scale of both.

International medical graduates are not a fringe presence in American medicine. According to AAMC's 2025 key findings, 25.6 percent of active physicians in the United States in 2024 were international medical graduates. Roughly 1 in 4.

The route runs through ECFMG certification, which requires passing USMLE Step 1 and Step 2 CK, meeting the clinical and communication skills requirements, and having your medical education credentials verified against a school listed in the World Directory of Medical Schools. ECFMG certification is required to enter an ACGME accredited residency, and the NRMP requires it be complete by the rank order list deadline.

One live detail worth knowing, because it circulates in distorted form. The long planned requirement that an applicant's medical school hold accreditation recognized by the World Federation for Medical Education has been repeatedly deferred, and it is currently appearing as a notation on program director reports rather than functioning as a bar on certification eligibility. ECFMG's own position is that candidates can continue to pursue certification even where their school does not currently meet that policy. That is the status as of this issue. It is exactly the kind of thing to recheck yourself before making a decision on it, and the date on this paragraph is part of the information.

The 2026 Main Residency Match numbers: 11,944 non US citizen international medical graduates submitted rank order lists, and 6,733 matched to a PGY-1 position, a match rate of 56.4 percent. For US citizen international medical graduates, 4,210 applicants and 2,949 matched, 70.0 percent.

Read that honestly in both directions. More than half of non US citizen IMG applicants matched, which is not the catastrophe the internet describes. And roughly 5,200 people did not, which is not a rounding error either.

There is no published survey on how long this move takes, so this issue is not going to invent a timeline for you. What can be said is what the entry points actually look like.

Roles with assistant, associate or coordinator in the title are the common doorway, and they are not a judgment on your training. They are the fastest available way to convert a foreign medical degree into a US clinical research CV that a screening process reads without stumbling.

The 2 things worth doing while you are in that first role: get GCP training and know which version you were trained on, and get your hands on the safety side of at least one study, because adverse event assessment is where your medical training is most visibly worth more than the title you were hired into.

And translate your CV before you send it anywhere else. Not the facts, the vocabulary.

FDA regulation does not require an investigator to be a physician, and its definition of a sub investigator is simply any other member of the study team, with no mention of licensure or nationality. ICH E6(R3) asks for someone qualified by education, training and experience. What actually stands between a foreign trained physician and a given role is one of 3 separate things: state law on the practice of medicine, which only affects hands on clinical roles; the employer's own policy, which is not law and is sometimes negotiable; and the credential route into US residency, which runs through ECFMG certification and the Match, where 6,733 of 11,944 non US citizen IMG applicants matched to a PGY-1 position in 2026. Sponsor side roles including medical monitor, drug safety physician, medical writer and clinical scientist carry no regulatory license requirement at all. Dr. Idris took a job with assistant in the title, and by his third week he was the most useful person in the room on the question that mattered.

Reply to this email or leave a comment on the newsletter: did you train outside the US, or work alongside someone who did? What translated right away, and what took the longest to explain? Every query gets read, and the best ones get answered in a future issue.

Know a doctor who trained abroad and is weighing research work, or someone training for their first coordinator job? Send them this issue with your own referral link below, so the share counts.

The Open Site File is one part of Root to Rx, and we all work toward the same thing: making clinical research easier to understand and harder to misrepresent. Monday, The Root Room shows a real health claim trying to work on someone. Wednesday, Plain Talk takes one topic from the news apart in plain language, with the receipts. Sunday, The Roots, on LinkedIn, is a letter for the people whose family treats them as the medical desk. And twice a week, The Open Site File shows you the inside of the site, where the people who make trials run actually work. Different doors, one mission: more people who understand how medicine gets made, and fewer people misled about it.

• • •

The Open Site File is general education about how clinical research sites work. It is not regulatory, legal, or medical advice, and it is not tied to any specific study, sponsor, or employer. All names are invented. Always follow your own site's SOPs, your protocol, and your PI and QA team. Characters are composites.

Filed by Justin Yamashita, MSc., Open Label Media

Next in the file: Issue 16, the visit window, why the site keeps calling, and why nobody is angry with you.