diff --git a/app/services/data_stage/process_school_changes.rb b/app/services/data_stage/process_school_changes.rb
index f6e05fdf5f..bdfe5ebde5 100644
--- a/app/services/data_stage/process_school_changes.rb
+++ b/app/services/data_stage/process_school_changes.rb
@@ -98,7 +98,8 @@ def move_assets_from!(school:, successor:)
         school_cohort.update!(school: successor)
         school_cohort.ecf_participant_profiles.each do |profile|
           RectifyParticipantSchool.call(participant_profile: profile,
-                                        school: successor,
+                                        from_school: school,
+                                        to_school: successor,
                                         transfer_pupil_premium_and_sparsity: false)
         end
       end
diff --git a/app/services/rectify_participant_school.rb b/app/services/rectify_participant_school.rb
index f6bee5e675..068de60680 100644
--- a/app/services/rectify_participant_school.rb
+++ b/app/services/rectify_participant_school.rb
@@ -1,11 +1,12 @@
 # frozen_string_literal: true
 
 class RectifyParticipantSchool < BaseService
-  attr_reader :participant_profile, :school, :transfer_pupil_premium_and_sparsity
+  attr_reader :participant_profile, :from_school, :to_school, :transfer_pupil_premium_and_sparsity, :cohort, :school_cohort
 
-  def initialize(participant_profile:, school:, transfer_pupil_premium_and_sparsity: true)
+  def initialize(participant_profile:, from_school:, to_school:, transfer_pupil_premium_and_sparsity: true)
     @participant_profile = participant_profile
-    @school = school
+    @from_school = from_school
+    @to_school = to_school
     @transfer_pupil_premium_and_sparsity = transfer_pupil_premium_and_sparsity
   end
 
@@ -14,22 +15,35 @@ def initialize(participant_profile:, school:, transfer_pupil_premium_and_sparsit
   # that have been added to the wrong school by mistake or in a GIAS school closure/reopen
   # scenario.
   def call
-    cohort = participant_profile.school_cohort.cohort
-    school_cohort = school.school_cohorts.find_by(cohort:)
+    @cohort = participant_profile.school_cohort.cohort
+    @school_cohort = to_school.school_cohorts.find_by(cohort:)
     return if school_cohort.blank?
 
     ActiveRecord::Base.transaction do
-      participant_profile.teacher_profile.update!(school:)
-      attrs = {
-        school_cohort:,
-      }
+      rectify_teacher_profile
+      rectify_mentor_pools if participant_profile.mentor?
+      rectify_participant_profile
+    end
+  end
+
+private
+
+  def rectify_mentor_pools
+    from_school.school_mentors.find_by(participant_profile:)&.update!(school: to_school)
+  end
 
-      if transfer_pupil_premium_and_sparsity
-        attrs[:sparsity_uplift] = school.sparsity_uplift?(cohort.start_year)
-        attrs[:pupil_premium_uplift] = school.pupil_premium_uplift?(cohort.start_year)
-      end
+  def rectify_participant_profile
+    attrs = { school_cohort: }
 
-      participant_profile.update!(attrs)
+    if transfer_pupil_premium_and_sparsity
+      attrs[:sparsity_uplift] = to_school.sparsity_uplift?(cohort.start_year)
+      attrs[:pupil_premium_uplift] = to_school.pupil_premium_uplift?(cohort.start_year)
     end
+
+    participant_profile.update!(attrs)
+  end
+
+  def rectify_teacher_profile
+    participant_profile.teacher_profile.update!(school: to_school)
   end
 end
diff --git a/spec/services/rectify_participant_school_spec.rb b/spec/services/rectify_participant_school_spec.rb
index 1ebfc4414c..46de1ad487 100644
--- a/spec/services/rectify_participant_school_spec.rb
+++ b/spec/services/rectify_participant_school_spec.rb
@@ -6,13 +6,22 @@
   subject(:service) { described_class }
   let(:cohort) { Cohort.current || create(:cohort, :current) }
   let(:participant_profile) { create(:ect_participant_profile, cohort:) }
+  let(:participant_identity) { participant_profile.participant_identity }
+  let(:old_school) { participant_profile.school }
   let(:new_school) { create(:school, name: "Big Shiny School", urn: "123000") }
   let!(:school_cohort) { create(:school_cohort, cohort:, school: new_school) }
   let(:transfer_uplift) { true }
 
   describe ".call" do
     before do
-      service.call(participant_profile:, school: new_school, transfer_pupil_premium_and_sparsity: transfer_uplift)
+      if participant_profile.mentor?
+        old_school.school_mentors.create!(participant_profile:, preferred_identity: participant_identity)
+      end
+
+      service.call(participant_profile:,
+                   from_school: old_school,
+                   to_school: new_school,
+                   transfer_pupil_premium_and_sparsity: transfer_uplift)
       participant_profile.reload
     end
 
@@ -65,5 +74,14 @@
         expect(participant_profile).not_to be_sparsity_uplift
       end
     end
+
+    context "when the participant is a mentor" do
+      let(:participant_profile) { create(:mentor_participant_profile) }
+
+      it "update both schools' mentor pool" do
+        expect(old_school.mentor_profiles).not_to include(participant_profile)
+        expect(new_school.mentor_profiles).to include(participant_profile)
+      end
+    end
   end
 end