diff --git a/lib/tasks/data_hygiene.rake b/lib/tasks/data_hygiene.rake
index e037d1fa3..0e4bd8a63 100644
--- a/lib/tasks/data_hygiene.rake
+++ b/lib/tasks/data_hygiene.rake
@@ -5,4 +5,22 @@ namespace :data_hygiene do
       abort "bulk updating organisations encountered errors"
     end
   end
+
+  desc "Mark an organisation as closed"
+  task :close_organisation, %i[content_id] => :environment do |_, args|
+    organisation = Organisation.find_by(content_id: args[:content_id])
+    organisation.update!(closed: true)
+    puts "Marked organisation #{organisation.slug} as closed"
+  end
+
+  desc "Move all users from one organisation to another"
+  task :bulk_update_user_organisation, %i[old_content_id new_content_id] => :environment do |_, args|
+    old_organisation = Organisation.find_by(content_id: args[:old_content_id])
+    new_organisation = Organisation.find_by(content_id: args[:new_content_id])
+
+    users = User.where(organisation: old_organisation)
+    users.update_all(organisation_id: new_organisation.id)
+
+    puts "Moved #{users.count} users from #{old_organisation.slug} to #{new_organisation.slug}"
+  end
 end
diff --git a/test/lib/tasks/data_hygiene_test.rb b/test/lib/tasks/data_hygiene_test.rb
new file mode 100644
index 000000000..2ae674b46
--- /dev/null
+++ b/test/lib/tasks/data_hygiene_test.rb
@@ -0,0 +1,35 @@
+require "test_helper"
+
+class DataHygieneTaskTest < ActiveSupport::TestCase
+  setup do
+    Signon::Application.load_tasks if Rake::Task.tasks.empty?
+
+    $stdout.stubs(:write)
+  end
+
+  context "#close_organisation" do
+    should "mark the organisation as closed" do
+      organisation = create(:organisation, slug: "department-of-health", closed: false)
+
+      Rake::Task["data_hygiene:close_organisation"].invoke(organisation.content_id)
+
+      assert organisation.reload.closed?
+    end
+  end
+
+  context "#bulk_update_user_organisation" do
+    should "update the organisation for matching users" do
+      old_organisation = create(:organisation, slug: "department-of-health-old")
+      new_organisation = create(:organisation, slug: "department-of-health-new")
+      another_organisation = create(:organisation, slug: "department-of-other-stuff")
+
+      user_1 = create(:user, organisation: old_organisation)
+      user_2 = create(:user, organisation: another_organisation)
+
+      Rake::Task["data_hygiene:bulk_update_user_organisation"].invoke(old_organisation.content_id, new_organisation.content_id)
+
+      assert_equal new_organisation, user_1.reload.organisation
+      assert_equal another_organisation, user_2.reload.organisation
+    end
+  end
+end