Peter W. Marx' work in and for the TWS is linked to various collaborations in a variety of ways. One of these is the Summer School [sic!], which was founded together with Tracy C. Davis in 2013 and has been continued as [six!] with five partner institutes since 2020. He has also been associated with the IFTR (The International Federation for Theatre Research) for many years.
As a curator, he has developed numerous exhibitions in collaboration with various museums since 2012.