Humanitarian's give relief to people that are experiencing hardship or suffering. They dispense things to people in need such as food, water, clothing, shelter, equipment and medical supplies. Generally, a Humanitarian's aim is to give relief and help to people in unfortunate and desperate situations. This can also be in the form of rescuing and providing safety for refugees, providing shelter and food for the homeless, or helping people in the aftermath of natural disasters or civil unrest.
There is a range of specialized fields from logistics to security. They accommodate to people in need and give them basic necessities such as food, water, shelter, medicine and equipment. They can also provide a safe haven for those people as well as ensure safety of those providing the relief, protection of goods and equipment, and protect the people being helped.
This job isn't only about delivering humans with help. The environment and animals effected by disasters need help too. A great example are those who helped to clean up the environment and animals affected by the recent oil spill.
Overall, there is a range of work for anyone with compassion and drive to help and do as much as they can for others.