diff --git a/app/models/job.rb b/app/models/job.rb
index 7743d91..98fc5f1 100644
--- a/app/models/job.rb
+++ b/app/models/job.rb
@@ -5,6 +5,7 @@ class Job < ApplicationRecord
   has_one_attached :pdf, dependent: :purge
 
   validates_presence_of :costumer_firstname, :costumer_lastname, :pdf
+  validates_presence_of :cost_center, if: :intern
   validates :privacy_policy, acceptance: true, unless: :created_by_operator?
   validates :number_of_plans_a0, :number_of_plans_a1, :number_of_plans_a2, :number_of_plans_a3, :costum_qm_plan, numericality: { greater_than_or_equal_to: 0 }