Grospiron said about 15% of sports and venues for 2030 have not yet been decided, but that details will be confirmed by June this year.
He said figure skating – which does not currently have a confirmed location – will take place in Nice, as will curling and ice hockey.
Grospiron also said they will decide on which new sports, if any, will be added to the programme and if any events will be removed.
The future of Nordic combined – the only event at Milan-Cortina 2026 not to have a women’s competition – has not yet been confirmed.
Ski mountaineering, which made its debut in 2026, is yet to be confirmed as a medal event in the French Alps.
“New sports are at the eart of our concerns, this will need to be broached to then decide what our venue plan is like and has to be validated by June by the IOC,” Grospiron said.
“We will not do this alone; we will do this hand in hand with federations and venues.
“For Nordic combined, this is at the helm of the IOC. We will follow the recommendations of the IOC. We are there to listen, to help us finalise our venue plan.”
There have been reports of infighting, external among the 2030 organising committee, with director general Cyril Linette allegedly departing amid differences with Grospiron, as well as budget cuts.
Grospiron said they have “little time, little money” but were confident the Games would be delivered successfully.
“We talk every day about wanting to make these Games a success,” he said. “The organising committee needs serenity, continuity, then we will show what our teams can do. We are very proud of the work we have been able to do.
“We know we have very little time, little money. But we can deliver a Games that will honour our vision and ambition.”