diff --git a/lib/models/observation.js b/lib/models/observation.js
index 8c193f5e..4593262d 100644
--- a/lib/models/observation.js
+++ b/lib/models/observation.js
@@ -192,9 +192,21 @@ const Observation = class Observation extends Model {
     );
   }
 
+    static preloadLastUpdaterObservationValue(obs) {
+        const updaterOptions = {
+            foreignKey: "updater_id",
+            attrName: "updater"
+        };
+        return ESModel.fetchBelongsTo(
+          _.flattenDeep(_.map(obs, "ofvs")),
+          User, updaterOptions
+        );
+    }
+
   static async preloadAllAssociations( req, obs, localeOpts ) {
     await Observation.preloadAnnotationControlledTerms( obs );
     await Observation.preloadMinimal( req, obs, localeOpts );
+    await Observation.preloadLastUpdaterObservationValue( obs );
     await Observation.preloadObservationFields( obs );
     const withProjects = _.filter(
       _.flattenDeep( [