I can recommend ERCI especially for medics, translators (Arabic, Farsi, Kurdish, French), skipper and lifeguards. It's a great chance to help refugees in Moria and Kara Tepe and of course at the shore line. Working for ERCI is not holiday and please don't expect a lot of free time, 8 hours... If you're willing to really help and want to work hard, ERCI is the best NGO for you. I have been working with ERCI for a lot of months and I really enjoy working with our international team. 

Please check the website ercintl.org for detailed information about the positions.

This organization has a very good goal, but is in need of significant improvements in organization.  Volunteers are overworked to the point of sickness and treated as expendable to the point that many quit and leave early.  While I loved the work that I did, I would choose to go with another organization on a future visit.