diff --git a/src/oneTrust/helpers/constants.ts b/src/oneTrust/helpers/constants.ts
new file mode 100644
index 00000000..3b74a416
--- /dev/null
+++ b/src/oneTrust/helpers/constants.ts
@@ -0,0 +1,16 @@
+import { createDefaultCodec } from '@transcend-io/type-utils';
+import { OneTrustEnrichedAssessment } from '../codecs';
+import { flattenOneTrustAssessment } from '.';
+
+/**
+ * An object with default values of type OneTrustEnrichedAssessment. It's very
+ * valuable when converting assessments to CSV, as it contains all keys that
+ * make up the CSV header in the expected order
+ */
+const DEFAULT_ONE_TRUST_COMBINED_ASSESSMENT: OneTrustEnrichedAssessment =
+  createDefaultCodec(OneTrustEnrichedAssessment);
+
+/** The header of the OneTrust ASsessment CSV file */
+export const DEFAULT_ONE_TRUST_ASSESSMENT_CSV_HEADER = Object.keys(
+  flattenOneTrustAssessment(DEFAULT_ONE_TRUST_COMBINED_ASSESSMENT),
+);