diff --git a/.github/python/requirements.txt b/.github/python/requirements.txt
new file mode 100644
index 0000000..3dc7512
--- /dev/null
+++ b/.github/python/requirements.txt
@@ -0,0 +1 @@
+xmlschema==3.3.1
diff --git a/.github/python/xsd_validate.py b/.github/python/xsd_validate.py
new file mode 100644
index 0000000..77bb45f
--- /dev/null
+++ b/.github/python/xsd_validate.py
@@ -0,0 +1,31 @@
+import argparse
+import os
+import xmlschema
+
+def validate_xml_files(xsd_path, xml_dir):
+    """Validates XML files in a directory against a given XSD schema."""
+    schema = xmlschema.XMLSchema(xsd_path)
+    at_least_one_invalid = False
+    for filename in os.listdir(xml_dir):
+        if filename.endswith(".xml"):
+            xml_path = os.path.join(xml_dir, filename)
+            try:
+                schema.validate(xml_path)
+                print(f"✅ {filename} is valid")
+            except xmlschema.XMLSchemaValidationError as e:
+                print(f"❌ {filename} is NOT valid:\n{e}")
+                at_least_one_invalid = True
+    
+    if at_least_one_invalid:
+        os._exit(1)
+
+def main():
+    parser = argparse.ArgumentParser(description="Validate XML files against an XSD schema.")
+    parser.add_argument("-xsd_file", help="Path to the XSD schema file")
+    parser.add_argument("-xml_directory", help="Directory containing XML files to validate")
+    args = parser.parse_args()
+
+    validate_xml_files(args.xsd_file, args.xml_directory)
+
+if __name__ == "__main__":
+    main()
diff --git a/.github/workflows/xsd_validation.yaml b/.github/workflows/xsd_validation.yaml
new file mode 100644
index 0000000..ccf1865
--- /dev/null
+++ b/.github/workflows/xsd_validation.yaml
@@ -0,0 +1,16 @@
+name: XML Validation
+
+on: [push, pull_request]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python 3.12
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+      - name: Install dependencies
+        run: pip install -r .github/python/requirements.txt
+      - name: Validate CQL Test XML
+        run: python -u .github/python/xsd_validate.py -xsd_file tests/testSchema.xsd -xml_directory tests/cql