Almost all vacancies are advertised here (in German look for "Forschungsstelle Nachhaltige Umweltforschung"): 

• http://www.verwaltung.uni-hamburg.de/stellenangebote/wissmit/fak6.html

Additional job opportunities are here:

• International Max-Planck Research Schools for
  • Earth system modelling
  • Maritime Affairs
• http://www.inomics.com/
• http://jobs.uni-hd.de/

Advertised PhD topics for the IMPRS-MA include

• Assessment of EU climate and energy policies on the ecology of the Baltic sea
• Assessment of expanding sugarcane monocultures on the ecology of coastal waters in Brazil

We are also interested in hosting suitable candidates from developing countries through third party stipends. If interested please contact (preferred via email) Uwe Schneider and describe your research interest. Submit documents with relevant information about you in one single pdf.

• Alexander von Humboldt International Climate Protection Fellowships
   for prospective leaders from threshold and developing countries

We occasionally provide internships for undergraduate students