diff --git a/app/jobs/migrate_resources_job.rb b/app/jobs/migrate_resources_job.rb
new file mode 100644
index 000000000..7c88f1a8a
--- /dev/null
+++ b/app/jobs/migrate_resources_job.rb
@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+# migrates models from AF to valkyrie
+class MigrateResourcesJob < ApplicationJob
+  # input [Array>>String] Array of ActiveFedora model names to migrate to valkyrie objects
+  # defaults to AdminSet & Collection models if empty
+  def perform(models: [])
+    models = collection_models_list if models.empty?
+
+    models.each do |model|
+      model.constantize.find_each do |item|
+        res = Hyrax.query_service.find_by(id: item.id)
+        # start with a form for the resource
+        fm = form_for(model:).constantize.new(resource: res)
+        # save the form
+        converted = Hyrax.persister.save(resource: fm)
+        # reindex
+        Hyrax.index_adapter.save(resource: converted)
+      end
+    end
+  end
+
+  def form_for(model:)
+    model.to_s + 'ResourceForm'
+  end
+
+  def collection_models_list
+    %w[AdminSet Collection]
+  end
+end
diff --git a/config/initializers/hyrax.rb b/config/initializers/hyrax.rb
index 37e8c2684..01d5fe380 100644
--- a/config/initializers/hyrax.rb
+++ b/config/initializers/hyrax.rb
@@ -39,6 +39,10 @@
   # breadcrumbs.
   config.file_set_model = 'Hyrax::FileSet'
 
+  # The default method used for Solr queries. Values are :get or :post.
+  # Post is suggested to prevent issues with URL length.
+  config.solr_default_method = :post
+
   # The email address that messages submitted via the contact page are sent to
   # This is set by account settings
   # config.contact_email = 'changeme@example.com'
diff --git a/lib/tasks/index.rake b/lib/tasks/index.rake
index 8a105b3f7..2e9cd95aa 100644
--- a/lib/tasks/index.rake
+++ b/lib/tasks/index.rake
@@ -30,6 +30,13 @@ task index_file_sets: :environment do
   end
 end
 
+desc "migrate all collections & admin sets to valkyrie in the background"
+task migrate_collections: :environment do
+  in_each_account do
+    MigrateResourcesJob.perform_later
+  end
+end
+
 def in_each_account
   Account.find_each do |account|
     puts "=============== #{account.name}============"
diff --git a/spec/jobs/migrate_resources_job_spec.rb b/spec/jobs/migrate_resources_job_spec.rb
new file mode 100644
index 000000000..92973df19
--- /dev/null
+++ b/spec/jobs/migrate_resources_job_spec.rb
@@ -0,0 +1,33 @@
+# frozen_string_literal: true
+
+require 'freyja/persister'
+RSpec.describe MigrateResourcesJob, clean: true do
+  before do
+    ActiveJob::Base.queue_adapter = :test
+    FactoryBot.create(:group, name: "public")
+  end
+
+  after do
+    clear_enqueued_jobs
+  end
+
+  let(:account) { create(:account_with_public_schema) }
+
+  let!(:af_admin_set) do
+    as = AdminSet.new(title: ['AF Admin Set'])
+    as.save
+    AdminSet.find(as.id)
+  end
+
+  describe '#perform' do
+    it "migrates admin sets to valkyrie", active_fedora_to_valkyrie: true do
+      expect(Valkyrie::Persistence::Postgres::ORM::Resource.find_by(id: af_admin_set.id.to_s)).to be_nil
+
+      ActiveJob::Base.queue_adapter.perform_enqueued_jobs = true
+      switch!(account)
+      MigrateResourcesJob.perform_now
+
+      expect(Valkyrie::Persistence::Postgres::ORM::Resource.find_by(id: af_admin_set.id.to_s)).to be_present
+    end
+  end
+end