diff --git a/app/models/memo.rb b/app/models/memo.rb
index 37f98a339..2f927b646 100644
--- a/app/models/memo.rb
+++ b/app/models/memo.rb
@@ -43,4 +43,5 @@
 
 class Memo < ApplicationRecord
 
-end
+  belongs_to :author, :class_name => "User", foreign_key: :author_id, counter_cache: true
+ end
diff --git a/app/models/resident_expert.rb b/app/models/resident_expert.rb
new file mode 100644
index 000000000..ab792491d
--- /dev/null
+++ b/app/models/resident_expert.rb
@@ -0,0 +1,2 @@
+class ResidentExpert < ApplicationRecord
+end
diff --git a/app/models/resident_expert_action.rb b/app/models/resident_expert_action.rb
new file mode 100644
index 000000000..fb2ceebe2
--- /dev/null
+++ b/app/models/resident_expert_action.rb
@@ -0,0 +1,2 @@
+class ResidentExpertAction < ApplicationRecord
+end
diff --git a/app/models/user.rb b/app/models/user.rb
index 2628a856e..fedd2fcb5 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -195,6 +195,7 @@ class User < Owner
 
   has_many :user_vote_options, dependent: :destroy 
   has_many :vote_options, through: :user_vote_options
+  has_many :memos, foreign_key: :author_id, dependent: :destroy
   
   # Groups and active users
   scope :active, lambda { where(status: [STATUS_ACTIVE, STATUS_EDIT_INFO]) }
diff --git a/db/migrate/20260323060649_create_resident_experts.rb b/db/migrate/20260323060649_create_resident_experts.rb
new file mode 100644
index 000000000..12a4c56c8
--- /dev/null
+++ b/db/migrate/20260323060649_create_resident_experts.rb
@@ -0,0 +1,20 @@
+class CreateResidentExperts < ActiveRecord::Migration[5.2]
+  def change
+    create_table :resident_experts do |t|
+      t.references :user
+      t.string :name 
+      t.string :gender
+      t.integer :expert_category 
+      t.integer :academic_degree 
+      t.string :department
+      t.string :title 
+      t.string :territory_area1
+      t.string :territory_area2
+      t.string :territory_area3
+      t.text :introduction
+      t.integer :status, default: 0
+
+      t.timestamps
+    end
+  end
+end
diff --git a/db/migrate/20260323060719_create_resident_expert_actions.rb b/db/migrate/20260323060719_create_resident_expert_actions.rb
new file mode 100644
index 000000000..2dfbe4739
--- /dev/null
+++ b/db/migrate/20260323060719_create_resident_expert_actions.rb
@@ -0,0 +1,12 @@
+class CreateResidentExpertActions < ActiveRecord::Migration[5.2]
+  def change
+    create_table :resident_expert_actions do |t|
+      t.references :resident_expert
+      t.integer :action_type, default: 0
+      t.string :action_name
+      t.string :action_description
+
+      t.timestamps
+    end
+  end
+end
diff --git a/db/migrate/20260323061746_add_memos_count_to_users.rb b/db/migrate/20260323061746_add_memos_count_to_users.rb
new file mode 100644
index 000000000..c340dc58a
--- /dev/null
+++ b/db/migrate/20260323061746_add_memos_count_to_users.rb
@@ -0,0 +1,11 @@
+class AddMemosCountToUsers < ActiveRecord::Migration[5.2]
+  def change
+    add_column :users, :memos_count, :integer, default: 0
+
+    User.find_each do |user|
+      User.reset_counters(user.id, :memos_count)
+    end
+  end
+
+
+end