One of the organizations that tried to help Sahara and have good goals with the Animals is the Saint Louis Zoo, even their had office been in Washington D.C they go in missions to help the animals of Sahara. If you need more informations or even go in one this missions contact them. https://www.stlzoo.org/about/mission/
The UNCCD is a organization that helps a alot of areas including Sahara Desert against Deserfication.