With members in over 40 countries, EXARC offers a strong supportive network. Roeland Paardekooper was one of the co-founders of this network in 2001 and has been active as director of it ever since. In EXARC experimental archaeologists, staff at archaeological open-air museums and everyone interested in these subjects can exchange knowledge, experience and best practice. Paardekooper's work for EXARC involves contact with all members, getting the word out about their and EXARCs activities and representing EXARC at for example ICOM.

The association publishes the EXARC Journal, featuring the latest developments in fieldwork, academic research, museum studies, living history interpretation and ancient technology. Published online with the best articles printed in hard copy. Paardekooper is the EXARC Journal briefing editor, responsible for scouting new articles and advertisements; exactly these activities require an extensive network of contacts.

EXARC supports its membership by organising small-scale collaborations, often with the help of significant European Union Grants. These projects raise the profile of the participants and allow other members to benefit from their experience. One example  is liveARCH, active in 2006-2009 and written by written by Archeo Interface, Geir Sør-Reime (the EXARC advisor for EU projects) and the Eindhoven Museum. LiveARCH was responsible for the EXARC minimum definition of what an archaeological open air museum is. Partly thanks to liveARCH, EXARC gained the status of ICOM Affiliated Organisation in 2009. Other examples are Didarchtik and Zeitgeist. Archeo Interface was also one of the authors, in cooperation with Geir Sør-Reime and Clara Masriera, of OpenArch, a Culture Project active since 2011. Paardekooper was Operational Manager of this project 2011-2012 to get this project on the road.