diff --git a/app/models/service_template.rb b/app/models/service_template.rb
index 6435d88f9af..214e49e8f05 100644
--- a/app/models/service_template.rb
+++ b/app/models/service_template.rb
@@ -41,6 +41,8 @@ class ServiceTemplate < ApplicationRecord
   include NewWithTypeStiMixin
   include TenancyMixin
   include ArchivedMixin
+  include ReservedMixin
+  reserve_attribute :internal, :boolean
   include_concern 'Filter'
 
   belongs_to :tenant
@@ -77,6 +79,7 @@ class ServiceTemplate < ApplicationRecord
   scope :without_service_template_catalog_id,       ->         { where(:service_template_catalog_id => nil) }
   scope :with_existent_service_template_catalog_id, ->         { where.not(:service_template_catalog_id => nil) }
   scope :displayed,                                 ->         { where(:display => true) }
+  scope :public_service_templates,                  ->         { where.not(:id => Reserve.where(:resource_type => "ServiceTemplate").all.collect { |r| r.resource_id if r.reserved[:internal] }.compact) }
 
   def self.catalog_item_types
     ci_types = Set.new(Rbac.filtered(ExtManagementSystem.all).flat_map(&:supported_catalog_types))
diff --git a/app/models/service_template_transformation_plan.rb b/app/models/service_template_transformation_plan.rb
index a9e692b43de..4e08ac53394 100644
--- a/app/models/service_template_transformation_plan.rb
+++ b/app/models/service_template_transformation_plan.rb
@@ -7,6 +7,8 @@ def request_type
     "transformation_plan"
   end
 
+  default_value_for :internal, true
+
   def transformation_mapping
     service_resources.find_by(:resource_type => 'TransformationMapping').resource
   end
diff --git a/spec/models/service_template_transformation_plan_spec.rb b/spec/models/service_template_transformation_plan_spec.rb
index 71ed306b426..a6005647509 100644
--- a/spec/models/service_template_transformation_plan_spec.rb
+++ b/spec/models/service_template_transformation_plan_spec.rb
@@ -37,6 +37,17 @@
     }
   end
 
+  describe '.public_service_templates' do
+    it 'display public service templates' do
+      st1 = FactoryGirl.create(:service_template_transformation_plan)
+      st2 = FactoryGirl.create(:service_template)
+
+      expect(st1.internal?).to be_truthy
+      expect(st2.internal?).to be_falsey
+      expect(ServiceTemplate.public_service_templates).to match_array([st2])
+    end
+  end
+
   describe '.create_catalog_item' do
     it 'creates and returns a transformation plan' do
       service_template = described_class.create_catalog_item(catalog_item_options)