NATO defence ministers are in Brussels on Thursday and Friday for two days of talks to agree on a training support mission for Ukraine as well long-term financial commitments.
In a press conference ahead of the meeting, NATO Secretary General Jens Stoltenberg urged allies to "approve a plan for NATO to lead the coordination of security assistance and training to Ukraine."
The project is a major part of a defence package for Ukraine that the 32-member alliance wants to approve at a NATO leaders' summit in Washington in July.
The aim is to transfer responsibility for coordinating military aid for Ukraine from an informal, United States-led structure called the Ukraine Defence Contact Group to the formal structures of NATO.
There are also talks ongoing between allies to seal a commitment to long-term financial support for Ukraine. Stoltenberg said previously that €40 billion ($43 billion) is needed each year for Ukraine at a minimum.
Rustem Umerov, Ukraine's defence minister, is taking part in the meeting with NATO defence ministers as part of a coordination body called the NATO-Ukraine Council.
US Defence Secretary Lloyd Austin is to chair a meeting of the US-led initiative on Thursday that has been the subject of intense discussion among allies ahead of the defence ministers' meeting.