When do AI PhD students graduate? A hiring calendar

What the public record says about when doctorates end

A doctorate ends in a public act, a defence or a thesis deposit, but the date is scattered. It sits in an ORCID entry, in a national thesis register, in a library record or on a lab page. The table below gathers the ones we found, by year.

Two things in this table shape the calendar. The first is that future years always look thin. A date enters a public record when someone writes it down, and few people write down a defence two years ahead. The count for next year grows as the year comes closer, which is why a list built once in January misses people who declare in the spring.

The second is the granularity. The sources declare a year, so the table cannot tell you whether a 2027 doctorate ends in February or in November. The month comes from the person, from a thesis register that records it, or from a defence announcement. Until you have it, plan as if the doctorate ends early in the year.

Declared dates and estimated dates

Every date on a profile in this index says what it rests on. The distinction decides how much weight you put on it.

• A document. A deposited thesis or a register entry with a defence date. In the past, this is a fact. For a doctorate still in progress, the closest equivalent is a register entry that states when it began, which theses.fr publishes for France.
• A declaration. An end date the person entered on ORCID or wrote on a lab page. It is a commitment, and commitments slip: a declared defence often moves by a term or two. The slip usually runs later, which leaves your window open longer.
• An estimate. When nothing states an end, the first paper does the work. Read it as a range of a year or two, a reason to look at someone rather than a date to plan around.

The estimate holds up because the time from first paper to defence barely changes between subjects. The medians below run from 4 to 5 years; the full measurement, and its limits, is in how long an AI doctorate takes.

A useful habit: when your first message goes out on an estimate, ask about timing in it. Most doctoral students will tell you roughly when they expect to finish, and their answer turns an estimate into a declaration you can plan on.

How far ahead of a defence should you write?

Six to nine months. Earlier, the honest answer from the candidate is that it is too soon to say, and the message is forgotten by the time it matters. Later, the decision is mostly made: a postdoc letter has been signed, or an industry offer accepted.

Two things move the window earlier. Academic hiring runs on its own calendar, with offers going out between January and April, so a candidate who might take a postdoc or a faculty position needs to know you before those letters land. And the strongest candidates hear from several companies, so being the first serious conversation is worth a few months of patience on your side.

Nothing moves it later. A candidate who defends in June and hears from you in May has already chosen, even if they have not signed.

The hiring calendar, month by month

Working backwards from the defence gives the same sequence every time. Twelve months out, the person is on your list and you have read their work. Nine to six months out, the first message goes. Six to three months out, the conversations happen: a technical discussion of their thesis, a talk to your team, a meeting with the people they would work with. Three months out, the offer is written, with a start date after the defence and room for the last weeks of writing.

Applied to the defences of 2027, that sequence gives the following months.

Read in November 2026, the first row is already late and the second is open now. The last row is the common case, because the sources give a year. Treating an unknown month as January costs you a few months of early contact. Treating it as December can cost you the candidate.

Read across the calendar year, the table gives a rhythm for a team that hires every year. The autumn is for first messages to people defending in the first half of next year. The winter is for offers to them, before the academic letters land. The spring is for first messages to people defending in the second half of next year, and for catching anyone whose date slipped. The summer is for building next year's list.

How alerts fit into the calendar

A calendar built once goes stale for the reason given above: dates keep appearing. Someone declares an end on ORCID in April, a thesis is registered in June, a lab page announces a defence in September. Each of those moves a person from estimate to date, and often from next year to this one.

An alert is a saved search that keeps the list current. It fires when a new researcher matches your subject, and again when a defence date on someone you follow firms up or moves closer. In the calendar above, the alert replaces the first column: you no longer build the list on a date, you are told when someone enters the window. The first message then goes out at the right distance from a date you can name, rather than on a guess about when the market wakes up.

Interns work on the same principle, earlier in the degree. A student who spends a summer with you defends a year or two later, and hiring AI research interns covers that first contact. For where these candidates sit, by country and by subject, see where AI researchers are and the atlas.

What the calendar does not tell you

• Who is missing. The dated ends are a floor. Plenty of doctoral students never write their end date anywhere public, and they only appear here through the estimate.
• Who has already decided. A date tells you when someone becomes free, not whether they are still looking. A candidate may have agreed to join a former internship host long before the defence.
• Local rules. Doctoral systems differ by country in how a defence is scheduled and how long the gap is between the manuscript and the ceremony. Ask the candidate when they can actually start.

None of this changes the rule, which fits in a line: know the date, write six to nine months before it, and have the offer out three months before. The method page sets out where each date comes from.

Common questions

When do AI PhD students usually graduate?

Throughout the year, depending on the country and the university. Public records mostly state the year a doctorate ends rather than the month, so plan on the year, treat the month as early in it until you know better, and ask the candidate to confirm.

How far in advance should I contact a PhD student before they graduate?

Six to nine months before the defence, and earlier for a candidate who may take an academic offer, since those go out between January and April. Have your own offer out about three months before the defence.

What is the difference between a declared and an estimated graduation date?

A declared date comes from a public source: a thesis register, a deposited thesis, an ORCID entry or a lab page. An estimated date is computed from the first published paper, using the time that typically separates a first paper from a defence. A declared future date can slip by a term or two; an estimate is a range, not a date.

What should I do when I only know the year of the defence?

Plan as if the doctorate ends early in that year, which means a first message from the spring of the previous year. Ask about timing in that first message: most doctoral students will say roughly when they expect to finish.

How do alerts help with hiring PhD graduates?

A saved search fires when a new researcher matches your subject and when a defence date on someone you follow firms up or moves closer. You write when a person enters the six to nine month window, instead of rebuilding a list by hand each season.