diff --git a/group_vars/all/plain.yml b/group_vars/all/plain.yml
index 9b60968..2b13531 100644
--- a/group_vars/all/plain.yml
+++ b/group_vars/all/plain.yml
@@ -76,7 +76,7 @@ gitlab_ansible_user_name: "gitlabci"
 backupuser_user_name: backupuser
 
 # used for root-access by hetzner on server creation (@see cloud console/security/ssh-keys)
-hetzner_ssh_keys:
+default_hetzner_ssh_keys:
   - "claus.paetow@netgo.de"
   - "friedrich.goerz@netgo.de"
   - "sven.ketelsen@netgo.de"
@@ -85,6 +85,11 @@ hetzner_ssh_keys:
   - "{{ awx_ansible_user_name }}@netgo.de"
   - "{{ gitlab_ansible_user_name }}@git.dev-at.de"
 
+hetzner_ssh_keys: "{{
+   default_hetzner_ssh_keys
+   + (custom_stage_hetzner_ssh_keys | default([]))
+   }}"
+
 hetzner_server_labels: "stage={{ stage }}"
 
 admin_user: "root"
diff --git a/group_vars/stage_dev/plain.yml b/group_vars/stage_dev/plain.yml
index 791a6c5..db3b2d5 100644
--- a/group_vars/stage_dev/plain.yml
+++ b/group_vars/stage_dev/plain.yml
@@ -109,6 +109,9 @@ gpg_key_smardigo_automation__private: '{{ gpg_key_smardigo_automation__private__
 custom_stage_plattform_users:
   - hp.wissenbach
 
+custom_stage_hetzner_ssh_keys:
+  - "ext.hans-peter.wissenbach@netgo.de"
+
 kubernetes_with_prometheus: False
 cert_manager_dplmt: False
 kubernetes_with_certmanager: False