diff --git a/app/models/relationship.rb b/app/models/relationship.rb
index 08a2d69..1412172 100644
--- a/app/models/relationship.rb
+++ b/app/models/relationship.rb
@@ -1,7 +1,9 @@
 # frozen_string_literal: true
 
 class Relationship < ApplicationRecord
-  enum status: %i[supporter member excluded]
+  enum status: %i[supporter excluded member]
+
+  enum role: %i[manager supervisor]
 
   ################
   # Associations #
@@ -17,4 +19,6 @@ class Relationship < ApplicationRecord
   validates :from_date, presence: true, uniqueness: { scope: :person_id }
 
   validates :status, presence: true
+
+  validates :role, absence: { unless: :member? }
 end
diff --git a/db/migrate/20190427141639_create_relationships.rb b/db/migrate/20190427141639_create_relationships.rb
index c9dac9a..96b3ffa 100644
--- a/db/migrate/20190427141639_create_relationships.rb
+++ b/db/migrate/20190427141639_create_relationships.rb
@@ -11,10 +11,10 @@ class CreateRelationships < ActiveRecord::Migration[6.0]
       t.references :regional_office,
                    null: false, index: true,  foreign_key: true
 
-      t.date    :from_date, null: false, index: true
-      t.integer :status,    null: false, index: true
-
-      t.date :until_date
+      t.date    :from_date,  null: false, index: true
+      t.date    :until_date, null: true,  index: false
+      t.integer :status,     null: false, index: true
+      t.integer :role,       null: true,  index: true
 
       t.index %i[person_id from_date], unique: true
     end
@@ -25,6 +25,10 @@ class CreateRelationships < ActiveRecord::Migration[6.0]
           ALTER TABLE relationships ADD CONSTRAINT dates CHECK (
             until_date IS NULL OR from_date < until_date
           );
+
+          ALTER TABLE relationships ADD CONSTRAINT role CHECK (
+            status = 2 /* member */ OR role IS NULL
+          );
         SQL
       end
     end
diff --git a/db/structure.sql b/db/structure.sql
index 1a3d285..96c1ba9 100644
--- a/db/structure.sql
+++ b/db/structure.sql
@@ -400,9 +400,11 @@ CREATE TABLE public.relationships (
     person_id bigint NOT NULL,
     regional_office_id bigint NOT NULL,
     from_date date NOT NULL,
-    status integer NOT NULL,
     until_date date,
-    CONSTRAINT dates CHECK (((until_date IS NULL) OR (from_date < until_date)))
+    status integer NOT NULL,
+    role integer,
+    CONSTRAINT dates CHECK (((until_date IS NULL) OR (from_date < until_date))),
+    CONSTRAINT role CHECK (((status = 2) OR (role IS NULL)))
 );
 
 
@@ -915,6 +917,13 @@ CREATE UNIQUE INDEX index_relationships_on_person_id_and_from_date ON public.rel
 CREATE INDEX index_relationships_on_regional_office_id ON public.relationships USING btree (regional_office_id);
 
 
+--
+-- Name: index_relationships_on_role; Type: INDEX; Schema: public; Owner: -
+--
+
+CREATE INDEX index_relationships_on_role ON public.relationships USING btree (role);
+
+
 --
 -- Name: index_relationships_on_status; Type: INDEX; Schema: public; Owner: -
 --
diff --git a/factories/relationships.rb b/factories/relationships.rb
index 03d6276..a73eab7 100644
--- a/factories/relationships.rb
+++ b/factories/relationships.rb
@@ -10,10 +10,7 @@ FactoryBot.define do
     end
 
     status { :supporter }
-  end
-
-  factory :member_relationship, parent: :supporter_relationship do
-    status { :member }
+    role { nil }
   end
 
   factory :excluded_supporter_relationship, parent: :supporter_relationship do
@@ -23,4 +20,16 @@ FactoryBot.define do
   factory :excluded_member_relationship, parent: :member_relationship do
     status { :excluded }
   end
+
+  factory :member_relationship, parent: :supporter_relationship do
+    status { :member }
+  end
+
+  factory :manager_relationship, parent: :member_relationship do
+    role { :manager }
+  end
+
+  factory :supervisor_relationship, parent: :member_relationship do
+    role { :supervisor }
+  end
 end
diff --git a/spec/models/relationship_spec.rb b/spec/models/relationship_spec.rb
index 2d7b2d1..0e3efb6 100644
--- a/spec/models/relationship_spec.rb
+++ b/spec/models/relationship_spec.rb
@@ -21,4 +21,31 @@ RSpec.describe Relationship do
   describe '#status' do
     it { is_expected.to validate_presence_of :status }
   end
+
+  describe '#role' do
+    context 'for supporter relationship' do
+      subject { create :supporter_relationship }
+
+      it { is_expected.to validate_absence_of :role }
+    end
+
+    context 'for excluded supporter relationship' do
+      subject { create :excluded_supporter_relationship }
+
+      it { is_expected.to validate_absence_of :role }
+    end
+
+    context 'for excluded member relationship' do
+      subject { create :excluded_member_relationship }
+
+      it { is_expected.to validate_absence_of :role }
+    end
+
+    context 'for member relationship' do
+      subject { create :member_relationship }
+
+      it { is_expected.not_to validate_absence_of :role }
+      it { is_expected.not_to validate_presence_of :role }
+    end
+  end
 end