UN inter-agency mobility, secondment and lateral transfer explained

A career inside the UN common system rarely stays inside one agency. Staff move from UNDP to UNICEF, from a specialized agency into the Secretariat, from a government ministry into a UN entity on secondment and back again — and each of those moves works differently depending on which mechanism carries it. This guide explains the three main routes — inter-agency mobility, secondment or loan, and a straight competitive lateral transfer — what each one preserves and what it doesn’t, and what to check before you make the move. For how appointment types themselves work, see the staff contract types guide.

Why the system has inter-agency mobility at all

The UN common system is not one employer — it is roughly thirty separate funds, programmes, specialized agencies and related organizations, each with its own recruitment, its own budget and its own HR administration, described in the system structure guide. Left alone, that fragmentation would trap talent inside single agencies and make cross-system careers all but impossible. The common-system organizations have instead built shared mechanisms — coordinated through the UN System Chief Executives Board for Coordination (CEB) and its HR network — that let staff move between agencies without starting their UN career over from zero each time.

Three different routes, three different effects

“Moving to another UN agency” can mean three structurally different things, and the difference matters far more than the informal language candidates use for it:

• Inter-agency mobility (transfer). A staff member moves from one common-system organization to another under the system’s inter-organization mobility arrangements, generally preserving continuity of service — the unbroken service record that matters for contract-type reviews and pension purposes — rather than treating the move as a fresh hire.
• Secondment or loan. A staff member remains employed by their home organization (which can be another UN entity, or a government) while working temporarily inside a different one, on terms agreed between the two employers, for a defined period after which they normally return to the sending side.
• Straight lateral transfer via open competition. A staff member simply applies for a vacancy at another agency like any external candidate, competes through the standard selection process, and if selected resigns from the first organization and takes up a new appointment at the second — with no automatic continuity protections unless the receiving organization’s rules extend them.

What genuine inter-agency mobility preserves

Where a move qualifies as inter-agency mobility rather than a break-and-rehire, it typically preserves continuity of service without a break — relevant to the service-length thresholds behind a continuing appointment review — and preserves participation in the UN Joint Staff Pension Fund (UNJSPF) without the move counting as a separation and withdrawal. Because most common-system organizations participate in the same pension fund, a UNJSPF-contributing move between them can continue uninterrupted rather than forcing a withdrawal settlement and a fresh enrolment. None of this is automatic across every possible pair of organizations or every appointment type — confirm the specific mechanism your receiving and sending HR offices are using before you assume continuity applies.

How a secondment actually works

A secondment is an agreement between two employers about one person, not a unilateral request from the staff member. The sending organization (a government ministry, another UN entity, sometimes a university or research institution) and the receiving UN organization agree the assignment length, who pays what share of salary and benefits, and the terms for extension or early return. Government-seconded staff commonly keep their national civil-service status and benefits running in parallel, working inside the UN entity for the agreed period before returning to their home administration — a route that suits government officials gaining multilateral experience without giving up their national career track, and suits UN entities that need a specific government relationship or technical expertise for a defined window.

Who is actually eligible to move

Inter-agency mobility and secondment routes are generally open to staff already holding a qualifying UN appointment — the exact eligibility depends on appointment type and length of service, and is set by each organization’s own administrative instructions implementing the common-system framework rather than by a single rule that applies everywhere. Candidates outside the system — including UN Volunteers, interns and consultants, covered in the UNV guide and the consultancy contracts guide — are not eligible for inter-agency mobility mechanisms, since those mechanisms move existing staff between staff appointments; anyone outside the staff category has to compete for a staff vacancy through the normal external selection process instead.

What a move can put at risk

Mobility is not risk-free. A straight lateral transfer through open competition, rather than a recognised inter-agency mobility mechanism, can reset continuity of service and interrupt the clock toward a continuing appointment review. A secondment that runs past its agreed term without a formal extension can leave a staff member in an ambiguous position with neither employer. And because pay, grading and post-adjustment can differ between organizations even at the same nominal grade — see the ICSC salary scale guide for why — a move that looks lateral on paper can still change take- home pay at the new duty station. Get the continuity, pension and benefits questions confirmed in writing by both HR offices before you resign from the sending post.

How to actually pursue a move

In practice, most inter-agency moves start the same way any other UN hire does: an open vacancy on the receiving organization’s own recruitment portal, sometimes flagged as open to inter-organization mobility candidates or restricted to current UN system staff. Secondments, by contrast, are usually negotiated directly between the sending institution and the receiving UN entity rather than advertised as a public vacancy — if you work for a government or partner organization with an existing relationship to a UN entity, the first step is raising it with your own HR or the relevant UN desk, not searching a jobs board. Either way, current openings across the system are always live on the board, and a free changemaker profile keeps track of what you’ve applied for as you move between agencies.