diff --git a/prime-router/src/main/resources/metadata/fhir_transforms/senders/C2Sense/c2sense-sender-transform.yml b/prime-router/src/main/resources/metadata/fhir_transforms/senders/C2Sense/c2sense-sender-transform.yml
new file mode 100755
index 00000000000..9b774af5e4b
--- /dev/null
+++ b/prime-router/src/main/resources/metadata/fhir_transforms/senders/C2Sense/c2sense-sender-transform.yml
@@ -0,0 +1,7 @@
+# $schema: ../../../../../../../metadata/json_schema/fhir/fhir-to-fhir-transform.json
+extends: classpath:/metadata/fhir_transforms/senders/original-pipeline-transforms.yml
+elements:
+  - name: sender-identifier
+    resource: 'Bundle.entry.resource.ofType(MessageHeader)'
+    bundleProperty: '%resource.extension("https://reportstream.cdc.gov/fhir/StructureDefinition/sender-id").value[x]'
+    value: [ '"c2sense"' ]
diff --git a/prime-router/src/main/resources/metadata/fhir_transforms/senders/MMTC/mmtc-sender-transform.yml b/prime-router/src/main/resources/metadata/fhir_transforms/senders/MMTC/mmtc-sender-transform.yml
index 2e3b82c2d22..39123d89963 100644
--- a/prime-router/src/main/resources/metadata/fhir_transforms/senders/MMTC/mmtc-sender-transform.yml
+++ b/prime-router/src/main/resources/metadata/fhir_transforms/senders/MMTC/mmtc-sender-transform.yml
@@ -1,6 +1,11 @@
 extends: classpath:/metadata/fhir_transforms/senders/original-pipeline-transforms.yml
 
 elements:
+  - name: sender-identifier
+    resource: 'Bundle.entry.resource.ofType(MessageHeader)'
+    bundleProperty: '%resource.extension("https://reportstream.cdc.gov/fhir/StructureDefinition/sender-id").value[x]'
+    value: [ '"mmtc"' ]
+
   - name: patient-state-from-zip-code
     resource: "Bundle.entry.resource.ofType(Patient).address"
     bundleProperty: '%resource.extension("https://reportstream.cdc.gov/fhir/StructureDefinition/state-from-zip-code").value[x]'