diff --git a/converter/converter/cisu/resources_info/resources_info_cisu_constants.py b/converter/converter/cisu/resources_info/resources_info_cisu_constants.py
index 9d8f7b97a..0732a3e47 100644
--- a/converter/converter/cisu/resources_info/resources_info_cisu_constants.py
+++ b/converter/converter/cisu/resources_info/resources_info_cisu_constants.py
@@ -2,6 +2,8 @@ class ResourcesInfoCISUConstants:
     RESOURCE_PATH = "$.resource"
     STATE_PATH = "$.state"
     VEHICLE_TYPE_PATH = "$.vehicleType"
+    MISSION_ID_PATH = "$.missionId"
+    OPERATION_ID_PATH = "$.operationId"
 
     CASE_ID_FIELD = "caseId"
     RESOURCE_ID_KEY = "resourceId"
diff --git a/converter/converter/cisu/resources_info/resources_info_cisu_converter.py b/converter/converter/cisu/resources_info/resources_info_cisu_converter.py
index 86e5530a0..7449c5b60 100644
--- a/converter/converter/cisu/resources_info/resources_info_cisu_converter.py
+++ b/converter/converter/cisu/resources_info/resources_info_cisu_converter.py
@@ -15,7 +15,7 @@
     get_last_rc_ri_by_case_id,
     get_rs_messages_by_case_id,
 )
-from converter.utils import get_field_value, set_value, delete_paths
+from converter.utils import get_field_value, set_value, delete_paths, switch_field_name
 import logging
 
 logger = logging.getLogger(__name__)
@@ -70,6 +70,13 @@ def _build_rs_ri_from_cisu(cls, edxl_json: Dict[str, Any]) -> Dict[str, Any]:
             # RS-RI does not carry GPS position — remove it if present
             delete_paths(resource, [ResourcesInfoCISUConstants.POSITION_KEY])
 
+            # Map operationId to missionId
+            switch_field_name(
+                resource,
+                ResourcesInfoCISUConstants.OPERATION_ID_PATH,
+                ResourcesInfoCISUConstants.MISSION_ID_PATH,
+            )
+
         return cls.format_rs_output_json(output_json, output_use_case_json)
 
     @classmethod
@@ -317,6 +324,7 @@ def _convert_resources_to_cisu(
                 cls._translate_to_cisu_vehicle_type(resource)
                 cls._keep_last_state(resource)
                 cls._remove_patient_id(resource)
+                cls._replace_operation_id_by_mission_id(resource)
 
                 converted_resources.append(resource)
             except ConversionError:
@@ -324,6 +332,14 @@ def _convert_resources_to_cisu(
 
         return converted_resources
 
+    @classmethod
+    def _replace_operation_id_by_mission_id(cls, resource):
+        switch_field_name(
+            resource,
+            ResourcesInfoCISUConstants.MISSION_ID_PATH,
+            ResourcesInfoCISUConstants.OPERATION_ID_PATH,
+        )
+
     @classmethod
     def _remove_patient_id(cls, resource):
         delete_paths(resource, [ResourcesInfoCISUConstants.PATIENT_ID_KEY])
diff --git a/converter/tests/fixtures/RC-RI/RC-RI_V3.0_exhaustive_fill.json b/converter/tests/fixtures/RC-RI/RC-RI_V3.0_exhaustive_fill.json
index d39c1aea9..fed743cb4 100644
--- a/converter/tests/fixtures/RC-RI/RC-RI_V3.0_exhaustive_fill.json
+++ b/converter/tests/fixtures/RC-RI/RC-RI_V3.0_exhaustive_fill.json
@@ -38,7 +38,7 @@
         "resourceId": "fr.fire.sis076.cgo-076.resource.VSAV3A",
         "requestId": "fr.fire.sis076.cgo-076.request.177",
         "centerName": "Centre de Secours 76 - A",
-        "missionId": "fr.fire.sis076.cgo-076.mission.177",
+        "operationId": "fr.fire.sis076.cgo-076.mission.177",
         "centerCity": "75011",
         "orgId": "fr.fire.sdis76.cgo-076",
         "name": "VSAV 76 - 22D8",