The Hellenic National Space Weather Research (HNSWR) network (http://proteus.space.noa.gr/~hnswrn) announces the availability of four (4) post-doctoral research associate positions in solar and heliospheric physics. The positions refer to basic research in the following topics: (1) buildup and triggering of eruptions in the solar atmosphere, (2) impact of eruptions in the solar atmosphere and coronal mass ejection (CME) formation, (3) CME propagation in the inner heliosphere and interaction with the ambient solar wind, and (4) response of Earth’s magnetosphere to variable solar forcing. Research will be performed in various Greek institutions, namely the Aristotle University of Thessaloniki and the National Observatory of Athens (1 position), the University of Athens and the Academy of Athens (1 position), the University of Ioannina (1 position), and the University of Thrace (1 position). Each position will have an initial one-year duration and, subject to performance, may be extended up to a maximum of three (3) years. The deadline for applications is May 31st, 2012 and the successful applicants are expected to start working in September 2012. For more information, interested colleagues may refer to the full text of the announcement for each research team at http://proteus.space.noa.gr/~hnswrn/news.html.