diff --git a/_activities/pyhep.md b/_activities/pyhep.md
index 5d8f4c88a..ee4c2d095 100644
--- a/_activities/pyhep.md
+++ b/_activities/pyhep.md
@@ -14,6 +14,7 @@ the sharing of knowledge and expertise. It embraces the broad community, from HE
 * Ianna Osborne (CMS and IRIS-HEP, Princeton)
 * Matthew Feickert (ATLAS and IRIS-HEP, University of Wisconsin-Madison)
 * Nikolai Krug (Belle II, LMU Munich)
+* Marcel Rieger (CMS, Hamburg University)
 
 All coordinators can be reached at <hsf-pyhep-organisation@googlegroups.com>.