diff --git a/app/models/concerns/user/project_roles.rb b/app/models/concerns/user/project_roles.rb
new file mode 100644
index 000000000..da8e4fb76
--- /dev/null
+++ b/app/models/concerns/user/project_roles.rb
@@ -0,0 +1,60 @@
+require 'aspector'
+
+module User::ProjectRoles
+  extend ActiveSupport::Concern
+
+  aspector do
+    # Check if user is member of project
+    around [
+      :is_member_of_project?,
+      :is_owner_of_project?,
+      :is_user_of_project?,
+      :is_user_or_higher_of_project?,
+      :is_technician_of_project?,
+      :is_technician_or_higher_of_project?,
+      :is_viewer_of_project?
+    ] do |proxy, *args, &block|
+      if args[0]
+        @user_project = user_projects.where(project: args[0]).take
+        @user_project ? proxy.call(*args, &block) : false
+      else
+        false
+      end
+    end
+  end
+
+  def is_member_of_project?(project)
+    # This is already checked by aspector, so just return true
+    true
+  end
+
+  def is_creator_of_project?(project)
+    project.created_by == self
+  end
+
+  def is_owner_of_project?(project)
+    @user_project.owner?
+  end
+
+  def is_user_of_project?(project)
+    @user_project.normal_user?
+  end
+
+  def is_user_or_higher_of_project?(project)
+    @user_project.normal_user? or @user_project.owner?
+  end
+
+  def is_technician_of_project?(project)
+    @user_project.technician?
+  end
+
+  def is_technician_or_higher_of_project?(project)
+    @user_project.technician? or
+      @user_project.normal_user? or
+      @user_project.owner?
+  end
+
+  def is_viewer_of_project?(project)
+    @user_project.viewer?
+  end
+end
\ No newline at end of file
diff --git a/app/models/concerns/user/team_roles.rb b/app/models/concerns/user/team_roles.rb
new file mode 100644
index 000000000..068c5713c
--- /dev/null
+++ b/app/models/concerns/user/team_roles.rb
@@ -0,0 +1,44 @@
+require 'aspector'
+
+module User::TeamRoles
+  extend ActiveSupport::Concern
+
+  aspector do
+    # Check if user is member of team
+    around [
+      :is_member_of_team?,
+      :is_admin_of_team?,
+      :is_normal_user_of_team?,
+      :is_normal_user_or_admin_of_team?,
+      :is_guest_of_team?
+    ] do |proxy, *args, &block|
+      if args[0]
+        @user_team = user_teams.where(team: args[0]).take
+        @user_team ? proxy.call(*args, &block) : false
+      else
+        false
+      end
+    end
+  end
+
+  def is_member_of_team?(team)
+    # This is already checked by aspector, so just return true
+    true
+  end
+
+  def is_admin_of_team?(team)
+    @user_team.admin?
+  end
+
+  def is_normal_user_of_team?(team)
+    @user_team.normal_user?
+  end
+
+  def is_normal_user_or_admin_of_team?(team)
+    @user_team.normal_user? or @user_team.admin?
+  end
+
+  def is_guest_of_team?(team)
+    @user_team.guest?
+  end
+end
\ No newline at end of file
diff --git a/app/models/user.rb b/app/models/user.rb
index 96afe98b2..6d76d455b 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -1,6 +1,6 @@
 class User < ApplicationRecord
-  include SearchableModel
-  include SettingsModel
+  include SearchableModel, SettingsModel
+  include User::TeamRoles, User::ProjectRoles
 
   acts_as_token_authenticatable
   devise :invitable, :confirmable, :database_authenticatable, :registerable,
diff --git a/config/application.rb b/config/application.rb
index 014a70fbb..129ba8e4c 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -15,6 +15,9 @@ module Scinote
     # Application configuration should go into files in config/initializers
     # -- all .rb files in that directory are automatically loaded.
 
+    # Load all model concerns, including subfolders
+    config.autoload_paths += Dir["#{Rails.root}/app/models/concerns/**/*.rb"]
+
     config.encoding = 'utf-8'
 
     config.active_job.queue_adapter = :delayed_job