diff --git a/admin/templates/users/reindex_user_share.html b/admin/templates/users/reindex_user_share.html
new file mode 100644
index 00000000000..9a0f6c93564
--- /dev/null
+++ b/admin/templates/users/reindex_user_share.html
@@ -0,0 +1,21 @@
+<a data-toggle="modal" data-target="#confirmReindexShareUser" class="btn btn-default">SHARE Reindex User Content</a>
+<div class="modal" id="confirmReindexShareUser">
+    <div class="modal-dialog">
+        <div class="modal-content">
+            <form class="well" method="post" action="{% url 'users:reindex-share-user' guid=user.guid %}">
+                <div class="modal-header">
+                    <button type="button" class="close" data-dismiss="modal">x</button>
+                    <h3>Are you sure you want to SHARE reindex all content for this user? {{ user.guid }}</h3>
+                    <p>This will trigger SHARE reindexing for all nodes and preprints where this user is a contributor.</p>
+                </div>
+                {% csrf_token %}
+                <div class="modal-footer">
+                    <input class="btn btn-danger" type="submit" value="Confirm" />
+                    <button type="button" class="btn btn-default" data-dismiss="modal">
+                        Cancel
+                    </button>
+                </div>
+            </form>
+        </div>
+    </div>
+</div>
diff --git a/admin/templates/users/user.html b/admin/templates/users/user.html
index 921900d01c8..9bd963cb49b 100644
--- a/admin/templates/users/user.html
+++ b/admin/templates/users/user.html
@@ -37,6 +37,7 @@
                 {% include "users/disable_user.html" with user=user %}
                 {% include "users/mark_spam.html" with user=user %}
                 {% include "users/reindex_user_elastic.html" with user=user %}
+                {% include "users/reindex_user_share.html" with user=user %}
             </div>
         </div>
     </div>
diff --git a/admin/users/urls.py b/admin/users/urls.py
index 309ba6bcd35..3c87ab1e332 100644
--- a/admin/users/urls.py
+++ b/admin/users/urls.py
@@ -26,6 +26,8 @@
     re_path(r'^(?P<guid>[a-z0-9]+)/get_reset_password/$', views.GetPasswordResetLink.as_view(), name='get-reset-password'),
     re_path(r'^(?P<guid>[a-z0-9]+)/reindex_elastic_user/$', views.UserReindexElastic.as_view(),
         name='reindex-elastic-user'),
+    re_path(r'^(?P<guid>[a-z0-9]+)/reindex_share_user/$', views.UserShareReindex.as_view(),
+        name='reindex-share-user'),
     re_path(r'^(?P<guid>[a-z0-9]+)/merge_accounts/$', views.UserMergeAccounts.as_view(), name='merge-accounts'),
     re_path(r'^(?P<guid>[a-z0-9]+)/draft_registrations/$', views.UserDraftRegistrationsList.as_view(), name='draft-registrations'),
 ]
diff --git a/admin/users/views.py b/admin/users/views.py
index bc4e550f88f..b15eace9cf4 100644
--- a/admin/users/views.py
+++ b/admin/users/views.py
@@ -37,6 +37,7 @@
     CONFIRM_HAM,
     UNFLAG_SPAM,
     REINDEX_ELASTIC,
+    REINDEX_SHARE,
 )
 
 from admin.users.forms import (
@@ -551,6 +552,44 @@ def post(self, request, *args, **kwargs):
         return redirect(self.get_success_url())
 
 
+class UserShareReindex(UserMixin, View):
+    permission_required = 'osf.change_osfuser'
+
+    def post(self, request, *args, **kwargs):
+        from api.share.utils import update_share
+        user = self.get_object()
+
+        nodes_count = user.contributed.count()
+        preprints_count = user.preprints.filter(deleted=None).count()
+
+        for node in user.contributed:
+            try:
+                update_share(node)
+            except Exception as e:
+                messages.error(request, f'Failed to SHARE reindex node {node._id}: {e}')
+
+        for preprint in user.preprints.filter(deleted=None):
+            try:
+                update_share(preprint)
+            except Exception as e:
+                messages.error(request, f'Failed to SHARE reindex preprint {preprint._id}: {e}')
+
+        messages.success(
+            request,
+            f'Triggered SHARE reindexing for {nodes_count} nodes and {preprints_count} preprints'
+        )
+
+        update_admin_log(
+            user_id=self.request.user.id,
+            object_id=user._id,
+            object_repr='User',
+            message=f'SHARE reindexed all content for user {user._id}',
+            action_flag=REINDEX_SHARE
+        )
+
+        return redirect(self.get_success_url())
+
+
 class UserDraftRegistrationsList(UserMixin, ListView):
     template_name = 'users/draft-registrations.html'
     permission_required = 'osf.view_draftregistration'
diff --git a/osf/models/user.py b/osf/models/user.py
index 6fcfbb6e159..6b29da822ed 100644
--- a/osf/models/user.py
+++ b/osf/models/user.py
@@ -869,6 +869,20 @@ def merge_user(self, user):
         user.save()
         signals.user_account_merged.send(user)
 
+        from api.share.utils import update_share
+
+        for node in user.contributed:
+            try:
+                update_share(node)
+            except Exception as e:
+                logger.exception(f'Failed to SHARE reindex node {node._id} during user merge: {e}')
+
+        for preprint in user.preprints.all():
+            try:
+                update_share(preprint)
+            except Exception as e:
+                logger.exception(f'Failed to SHARE reindex preprint {preprint._id} during user merge: {e}')
+
     def _merge_users_preprints(self, user):
         """
         Preprints use guardian.  The PreprintContributor table stores order and bibliographic information.