diff --git a/.github/workflows/mirroring.yml b/.github/workflows/mirroring.yml
deleted file mode 100644
index 7738d384..00000000
--- a/.github/workflows/mirroring.yml
+++ /dev/null
@@ -1,32 +0,0 @@
-name: Mirroring
-
-on:
-  workflow_dispatch:
-  pull_request:
-    branches: [ master ]
-
-jobs:
-  linter:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v4
-      with:
-        fetch-depth: 0
-
-    - name: PHP Lint
-      uses: michaelw90/PHP-Lint@2.1.0
-
-  mirror:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v4
-      with:
-        fetch-depth: 0
-
-    - name: Mirror to VOC gitolite
-      uses: pixta-dev/repository-mirroring-action@v1.1.1
-      with:
-        target_repo_url:
-          git@git.c3voc.de:streaming-website.git
-        ssh_private_key:
-          ${{ secrets.SSH_PRIVATE_KEY }}
diff --git a/.github/workflows/validate+sync.yml b/.github/workflows/validate+sync.yml
new file mode 100644
index 00000000..ff7c47f2
--- /dev/null
+++ b/.github/workflows/validate+sync.yml
@@ -0,0 +1,49 @@
+name: validate & sync
+
+on:
+  workflow_dispatch:
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  lint-and-validate:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+
+    - name: PHP Lint
+      uses: michaelw90/PHP-Lint@2.1.0
+
+    - name: Check for any changed config.json files
+      id: check-for-changed-configs
+      uses: tj-actions/changed-files@v41
+      with:
+        files: |
+          configs/conferences/**/config.json
+    
+    - name: Validate json files
+      if: steps.check-for-changed-configs.outputs.any_changed == 'true'
+      uses: dsanders11/json-schema-validate-action@v1.2.0
+      with:
+        schema: docs/config-schema.json
+        files: configs/conferences/**/config.json 
+
+  mirror:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+
+    - name: Mirror to VOC gitolite
+      env: 
+        secrets_available:  ${{ secrets.SSH_PRIVATE_KEY }} != ''
+      if: ${{ env.secrets_available }}
+      uses: pixta-dev/repository-mirroring-action@v1.1.1
+      with:
+        target_repo_url:
+          git@git.c3voc.de:streaming-website.git
+        ssh_private_key:
+          ${{ secrets.SSH_PRIVATE_KEY }}