UN grade structure explained: P-1 to P-5, D-1, D-2, and the Under-Secretary-General levels

A vacancy announcement lists a grade — P-3, D-1, FS-5 — before it lists almost anything else, and that single code carries more information than the job title does: rough seniority, the underlying pay scale, whether the post is internationally or locally recruited, and often the shortest realistic path in from outside. Most candidates learn what their own grade means by elimination, one vacancy at a time. This guide lays out the whole ladder in order, from entry Professional grades through to the political appointments at the very top, and what actually changes at each step.

The Professional ladder: P-1 to P-5

The P (Professional) category is the core internationally recruited grade band and the one most people reading this guide are aiming at. P-1 and P-2 are entry grades — filled overwhelmingly through structured entry routes such as the Young Professionals Programme and JPO placements rather than open competition, because so few P-1/P-2 vacancies are posted for direct external hire. P-3 is the first grade most outside candidates realistically compete into on a standard vacancy, expecting roughly five years of relevant experience and ownership of a defined workstream or portfolio. P-4 and P-5 step up again, into technical leadership or a small team, each adding a few more years of expected experience and a wider scope of responsibility — the exact figures are published in the ICSC salary scale guide, which also covers how post adjustment turns a P-grade base salary into the actual take-home figure at a given duty station.

Director level: D-1 and D-2

D-1 and D-2 are the Director grades — heads of a substantial division, department or country office, sitting above the Professional band and below the executive appointments. These posts are still filled through a competitive selection process rather than political appointment, but the pool of external candidates is small: most D-1/D-2 holders have spent a decade or more inside the UN system or an adjacent organization, and postings are correspondingly rare and highly contested. A D-2 heading a large country office or a specialized department is often the practical ceiling of a career built entirely through the standard competitive track.

Above Director: Assistant Secretary-General, Under-Secretary-General and the Secretary-General

Assistant Secretary-General (ASG) and Under-Secretary-General (USG) are not recruited through Inspira or any standard vacancy process at all. They are appointments made directly by the Secretary-General, weighing geographic balance, gender parity and — inescapably — member state politics, typically for a leadership role such as heading a department, a large fund or programme, or a peacekeeping mission. There is no application to submit for these posts; they are filled by selection and negotiation at the top of the organization, not by competing against a public applicant pool. The Secretary-General sits above even USG, elected by the General Assembly on the Security Council’s recommendation for a five-year term — a position reached through international diplomacy, not a career ladder inside the Secretariat.

The practical takeaway: if a guide, a recruiter or a LinkedIn post implies there is a competitive path from P-5 or D-2 up into ASG or USG the way there is from P-3 to P-4, treat it with real skepticism. Reaching Director level through the standard process is realistic with a strong career; reaching ASG or USG is a different kind of outcome entirely, driven by appointment, not application.

Beyond the P and D ladder

The P-to-USG ladder covers internationally recruited Professional and higher staff, but it is not the only grade structure in the UN system. General Service (GS) staff are recruited locally for administrative, support and technical roles on their own separate scale, set per duty station rather than on the common international P scale. The National Professional Officer (NO) category runs a parallel Professional-equivalent ladder for staff recruited nationally for roles requiring local knowledge. The Field Service (FS) category has its own grading for internationally recruited staff supporting peacekeeping and special political missions. None of these convert directly onto the P scale — a GS-7 and a P-2 are not the same seniority level dressed in different letters, and comparing across categories by grade number alone is a common and misleading mistake.

Grade sets the band, step moves you within it

Grade is not the only variable behind a salary figure. Within each grade, a step (typically I through XII or further) increases pay incrementally with time in the grade, independent of promotion. Two staff members at the same P-4 grade can be paid noticeably differently depending on how long each has held that grade — the vacancy announcement states the grade being recruited for, but where a new hire lands on the step scale is set separately by prior relevant service, not negotiated the way private-sector step placement often is.

How to use this when you're reading vacancies

Before applying, check that the grade on the vacancy actually matches your experience rather than your job title at a previous employer — a “manager” title outside the UN system does not automatically map to P-4, and organizations screen out applications where the stated experience clearly falls short of the grade’s requirement rather than downgrading the candidate into consideration for a lower one. If you are early career, the entry routes covered in the early-career paths guide are a more realistic route into P-1/P-2 than waiting for one of the rare open vacancies at that grade. Every current vacancy across the UN system, the development banks and the INGOs — with its grade stated up front — is searchable on the board, and a free changemaker profile keeps track of which grades you’re actually a competitive fit for as you apply.