diff --git a/app/controllers/about_controller.rb b/app/controllers/about_controller.rb
index 1ac45c73b..fc970f5cc 100644
--- a/app/controllers/about_controller.rb
+++ b/app/controllers/about_controller.rb
@@ -1,12 +1,8 @@
-# The controller for actions related to the about pages
 class AboutController < ApplicationController
-
+  before_action :check_external_link, only: [:tess, :registering, :learning_paths, :developers, :us]
   skip_before_action :authenticate_user!, :authenticate_user_from_token!
-  
-  def tess
-  end
 
-  def us
+  def tess
   end
 
   def registering
@@ -18,4 +14,22 @@ def learning_paths
   def developers
   end
 
+  def us
+  end
+
+  private
+
+  def check_external_link
+    if TeSS::Config.site['about_us_link'].present?
+      base = TeSS::Config.site['about_us_link'].to_s.chomp('/')
+      action_name_map = {
+        'tess' => '/',
+        'registering' => '/content/intro-content/',
+        'learning_paths' => '/content/learning-paths/',
+        'developers' => '/developers/code-data/',
+        'us' => '/overview/about/'
+      }
+      redirect_to "#{base}#{action_name_map.fetch(action_name)}", allow_other_host: true
+    end
+  end
 end
diff --git a/app/views/layouts/_header.html.erb b/app/views/layouts/_header.html.erb
index 52da0aeca..0de4eabe7 100644
--- a/app/views/layouts/_header.html.erb
+++ b/app/views/layouts/_header.html.erb
@@ -64,7 +64,7 @@
 
         <%= menu_group(pull: 'right') do %>
           <% main_tabs.each do |t| %>
-            <%= menu_item t("features.#{t[:feature]}.short"), t[:link] %>
+            <%= menu_item t("features.#{t[:feature]}.short"), t[:link], (t[:feature] == 'about' && TeSS::Config.site['about_us_link'].present? ? { target: '_blank', rel: 'noopener' } : {}) %>
           <% end %>
 
           <% if directory_tabs.present? %>
diff --git a/config/tess.example.yml b/config/tess.example.yml
index c8a51db5e..299cc1e5a 100644
--- a/config/tess.example.yml
+++ b/config/tess.example.yml
@@ -131,6 +131,7 @@ default: &default
     directory_tabs: ['trainers', 'content_providers', 'nodes', 'spaces']
     # The order in with the 'about us' tabs appear
     about_us_tab_order: ['tess_club', 'contact', 'team', 'funding', 'acknowledgements', 'cite']
+    about_us_link: https://elixirtess.github.io/docs # no / at the end
     n_provider_ids: 5
     calendar_event_maxlength: 5
     content_provider_grid_long: true # true for full width in grid, false for short
diff --git a/test/config/test_tess.yml b/test/config/test_tess.yml
index b2511a0fe..7df36ac09 100644
--- a/test/config/test_tess.yml
+++ b/test/config/test_tess.yml
@@ -30,6 +30,7 @@ default: &default
     repository: ''
     supported_by: 'elixir_supported_by'
     widget_example: 'elixir_widget_example'
+    about_us_link:
     gmaps_api_key: ''
   mailer:
     delivery_method: test
diff --git a/test/controllers/about_controller_test.rb b/test/controllers/about_controller_test.rb
index 6f550d878..72ef8f4dc 100644
--- a/test/controllers/about_controller_test.rb
+++ b/test/controllers/about_controller_test.rb
@@ -127,4 +127,31 @@ class AboutControllerTest < ActionController::TestCase
       assert_response :success
     end
   end
+
+  test 'should redirect about pages to external link when configured' do
+    site_settings = TeSS::Config.site.dup
+    site_settings['about_us_link'] = 'https://example.org'
+
+    with_settings(site: site_settings) do
+      get :tess
+      assert_response :redirect
+      assert_redirected_to 'https://example.org/'
+
+      get :registering
+      assert_response :redirect
+      assert_redirected_to 'https://example.org/content/intro-content/'
+
+      get :learning_paths
+      assert_response :redirect
+      assert_redirected_to 'https://example.org/content/learning-paths/'
+
+      get :developers
+      assert_response :redirect
+      assert_redirected_to 'https://example.org/developers/code-data/'
+
+      get :us
+      assert_response :redirect
+      assert_redirected_to 'https://example.org/overview/about/'
+    end
+  end
 end