He was in Haiti during the earthquake and expects to see a similar situation after he leaves today.
But he says that being in that sort of situation is tough to handle.
"Even if you want to, you can't help everyone. You just have to do what you can in the circumstances," he says to Swedish Radio News.
He says that it looks like the Swedish workers will be living in tents and will start their days early, with a packet of dried food for breakfast, and then get in the car to drive around and assess what local people urgently need. And then in the evening, he will be dealing with paper work and writing up reports.
Sjöholm will also be one of the people on the ground who has to make sure that the aid coming in from Europe gets to the right places.
But he's not worried about his own safety because he already knows many of the team he is to work with and feels safe.