diff --git a/draft-ounsworth-rats-x509-evidence.md b/draft-ounsworth-rats-x509-evidence.md
index fba7c1d..c683e76 100644
--- a/draft-ounsworth-rats-x509-evidence.md
+++ b/draft-ounsworth-rats-x509-evidence.md
@@ -50,6 +50,15 @@ author:
       org: Siemens
       email: hannes.tschofenig@gmx.net
 
+    - name: Henk Birkholz
+      org: Fraunhofer SIT
+      abbrev: Fraunhofer SIT
+      email: henk.birkholz@sit.fraunhofer.de
+      street: Rheinstrasse 75
+      code: '64295'
+      city: Darmstadt
+      country: Germany
+
 normative:
   RFC2119:
   RFC9334: