diff --git a/app/helpers/sac_cas/sheet/group/nav_left.rb b/app/helpers/sac_cas/sheet/group/nav_left.rb
new file mode 100644
index 000000000..f9c6bbd0a
--- /dev/null
+++ b/app/helpers/sac_cas/sheet/group/nav_left.rb
@@ -0,0 +1,16 @@
+# frozen_string_literal: true
+
+#  Copyright (c) 2024, Schweizer Alpen-Club. This file is part of
+#  hitobito_sac_cas and licensed under the Affero General Public License version 3
+#  or later. See the COPYING file at the top-level directory or at
+#  https://github.com/hitobito/hitobito_sac_cas
+
+module SacCas::Sheet::Group::NavLeft
+  NAME_WITHOUT_PREFIX = "REPLACE(REPLACE(name, 'SAC ', ''), 'CAS ', '')".freeze
+
+  private
+
+  def sub_layers
+    super.reorder(Arel.sql(NAME_WITHOUT_PREFIX))
+  end
+end
diff --git a/lib/hitobito_sac_cas/wagon.rb b/lib/hitobito_sac_cas/wagon.rb
index ec95ee358..3e0d54856 100644
--- a/lib/hitobito_sac_cas/wagon.rb
+++ b/lib/hitobito_sac_cas/wagon.rb
@@ -105,6 +105,7 @@ class Wagon < Rails::Engine
       Dropdown::TableDisplays.prepend SacCas::Dropdown::TableDisplays
       Dropdown::GroupEdit.prepend SacCas::Dropdown::GroupEdit
       Event::ParticipationButtons.prepend SacCas::Event::ParticipationButtons
+      Sheet::Group::NavLeft.prepend SacCas::Sheet::Group::NavLeft
 
       admin_item = NavigationHelper::MAIN.find { |item| item[:label] == :admin }
       admin_item[:active_for] += %w(cost_centers cost_units)
diff --git a/spec/helpers/sheet/group/nav_left_spec.rb b/spec/helpers/sheet/group/nav_left_spec.rb
new file mode 100644
index 000000000..feff0e678
--- /dev/null
+++ b/spec/helpers/sheet/group/nav_left_spec.rb
@@ -0,0 +1,45 @@
+# frozen_string_literal: true
+
+#  Copyright (c) 2024, Schweizer Alpen-Club. This file is part of
+#  hitobito_sac_cas and licensed under the Affero General Public License version 3
+#  or later. See the COPYING file at the top-level directory or at
+#  https://github.com/hitobito/hitobito_sac_cas
+
+require 'spec_helper'
+
+describe 'Sheet::Group::NavLeft' do
+  let(:group) { groups(:root) }
+  let(:sheet) { Sheet::Group.new(self, nil, group) }
+  let(:nav)   { Sheet::Group::NavLeft.new(sheet) }
+
+  let(:request) { ActionController::TestRequest.create({}) }
+
+  let(:html) { nav.render }
+  subject(:dom) { Capybara::Node::Simple.new(html) }
+
+  def can?(*_args)
+    true
+  end
+
+  describe 'ordering of sections' do
+    let(:links) { dom.all('li').map(&:text) }
+    let(:sections) { links[links.index('Sektionen')+1..] }
+    let(:bluemlisalp) { groups(:bluemlisalp) }
+    let(:matterhorn) { groups(:matterhorn) }
+
+    it 'orders sections by name' do
+      expect(sections).to eq  ['SAC Blüemlisalp', 'SAC Matterhorn']
+    end
+
+    it 'ignores cas prefix' do
+      matterhorn.update!(name: 'CAS Matterhorn')
+      expect(sections).to eq ['SAC Blüemlisalp', 'CAS Matterhorn']
+    end
+
+    it 'ignores sac prefix' do
+      bluemlisalp.update!(name: 'CAS Blüemlisalp')
+      matterhorn.update!(name: 'SAC Altels')
+      expect(sections).to eq ['SAC Altels', 'CAS Blüemlisalp']
+    end
+  end
+end