diff --git a/app/services/datacore/doi_metadata_service.rb b/app/services/datacore/doi_metadata_service.rb
new file mode 100644
index 00000000..15d34bf5
--- /dev/null
+++ b/app/services/datacore/doi_metadata_service.rb
@@ -0,0 +1,113 @@
+# frozen_string_literal: true
+
+module Datacore
+  class DoiMetadataService
+
+    PUBLISHER = "Indiana University".freeze
+    RESOURCE_TYPE = "Dataset".freeze
+    BASIC_KEYS = [:creators, :titles, :publisher, :publicationYear, :types, :url]
+    ADDITIONAL_KEYS = [:descriptions, :subjects, :contributors, :dates, :geoLocations, :fundingReferences, :language, :alternateIdentifiers, :rightsList]
+    # uses datacite metadata schema 4.5
+    # https://datacite-metadata-schema.readthedocs.io/en/4.5/properties/
+
+    attr_reader :work
+
+    # @param work DataSet 
+    def initialize(work:)
+      @work = work
+    end
+
+    # @return Hash all available work metadata
+    def metadata
+      @metadata ||= full_metadata
+    end
+
+    # @return nil
+    # reloads work and metadata
+    def reload
+      work.reload
+      @metadata = nil
+    end
+
+    # @return [Hash] work minimal required metadata for remote record creation or update
+    def basic_metadata
+      { creators: work.creator.map { |c| { name: c } },
+        titles: work.title.map { |t| { title: t } },
+        publisher: PUBLISHER,
+        publicationYear: Date.today.year.to_s,
+        types: { resourceTypeGeneral: RESOURCE_TYPE },
+        url: Rails.application.routes.url_helpers.hyrax_data_set_url(id: work.id)
+      }
+    end
+
+    # @return [Hash] expanded work metadata
+    def expanded_metadata(include_empty: false)
+      {
+        descriptions: descriptions,
+        subjects: work.subject.map { |s| { subject: s} },
+        contributors: work.contributor.map { |c| { contributorType: 'Researcher', name: c} },
+        dates: dates,
+        geoLocations: geo_location,
+        fundingReferences: funding,
+        language: language,
+        alternateIdentifiers: { alternateIdentifierType: 'DataCORE internal ID', alternateIdentifier: work.id },
+        rightsList: rights_license,
+        # below held in abeyance pending determination of relationType [IULRDC-174]
+        # relatedIdentifiers: work.related_url.map { |url| { relatedIdentifierType: 'URL', relationType: 'IsDescribedBy', relatedIdentifier: url } }
+      }.select { |k,v| v.present? || include_empty }
+    end
+
+    # @return [Hash] all work metadata
+    def full_metadata
+      basic_metadata.merge(expanded_metadata)
+    end
+
+    # @return Array
+    def dates
+      dates = []
+      dates << { dateType: 'Submitted', date: work.date_uploaded.strftime('%Y-%m-%d') } if work.date_uploaded.present?
+      dates << { dateType: 'Updated', date: work.date_modified.strftime('%Y-%m-%d') } if work.date_modified.present?
+      dates << { dateType: 'Collected', date: work.date_coverage } if work.date_coverage.present?
+      return dates
+    end
+
+    # @return Array
+    def descriptions
+      descriptions = []
+      descriptions += work.description.map { |desc| { lang: language, description: desc, descriptionType: 'Other' } }
+      descriptions += work.description_abstract.map { |desc| { lang: language, description: desc, descriptionType: 'Abstract' } }
+      descriptions << { lang: language, description: work.methodology, descriptionType: 'Methods' } if work.methodology.present?
+      return descriptions
+    end
+
+    # @return Array
+    def funding
+      (work.fundedby.to_a + work.fundedby_other.to_a).reject { |fund| fund == 'Other Funding Agency' }.map { |fund| { funderName: fund } }
+    end
+
+    def geo_location
+      geo_location = []
+      geo_location << { geoLocationPlace: work.geo_location_place } if work.geo_location_place.present?
+      geo_location << { geoLocationBox: geo_location_box } if geo_location_box.present?
+      return geo_location
+    end
+
+    def geo_location_box
+      return nil unless work.geo_location_box.present?
+      points = work.geo_location_box.gsub(/[^- .0-9]/, ' ').split(' ').select { |p| Float(p, exception: false) }
+      return nil unless points.size == 4
+      return [:southBoundLatitude, :westBoundLongitude, :northBoundLatitude, :eastBoundLongitude].zip(points).to_h
+    end
+
+    def language
+      work.language&.first || 'en'
+    end
+
+    def rights_license
+      rights = []
+      rights << { rightsUri: work.rights_license, rights: Hyrax::RightsLicenseService.new.select_active_options.map(&:reverse).to_h[work.rights_license] }
+      rights << { rights: work.rights_license_other } if work.rights_license_other.present?
+      return rights
+    end
+  end
+end
diff --git a/app/services/datacore/doi_minting_service.rb b/app/services/datacore/doi_minting_service.rb
index 410610a6..396f77c3 100644
--- a/app/services/datacore/doi_minting_service.rb
+++ b/app/services/datacore/doi_minting_service.rb
@@ -4,10 +4,8 @@ module Datacore
 
   class DoiMintingService
 
-    PUBLISHER = "Indiana University".freeze
-    RESOURCE_TYPE = "Dataset".freeze
-
-    attr_reader :current_user, :work, :metadata, :prefix, :doi
+    attr_reader :current_user, :work, :prefix, :doi, :metadata_service
+    delegate :basic_metadata, :expanded_metadata, :full_metadata, :metadata, to: :metadata_service
 
     # @return Boolean
     def self.enabled?
@@ -25,7 +23,7 @@ def self.mint_doi_for(work:, current_user:)
     def initialize(work:, current_user:)
       @work = work
       @current_user = current_user
-      @metadata = local_metadata
+      @metadata_service = Datacore::DoiMetadataService.new(work: work)
       @prefix = Settings.datacite.prefix&.to_s # cast inadvertent Float to String
       @doi = work.doi
     end
@@ -76,17 +74,6 @@ def update_work_with_doi!(doi, update_provenance: false)
         @doi
       end
 
-      # @return [Hash] work minimal metadata for remote record creation or update
-      def local_metadata
-        { creators: work.creator.map { |c| { name: c } },
-          titles: work.title.map { |t| { title: t } },
-          publisher: PUBLISHER,
-          publicationYear: Date.today.year.to_s,
-          types: { resourceTypeGeneral: RESOURCE_TYPE },
-          url: Rails.application.routes.url_helpers.hyrax_data_set_url(id: work.id)
-        }
-      end
-
       # @return [DataCite::Client] client instance for Datacite interactions
       def client(host: Settings.datacite.host, username: Settings.datacite.username, password: Settings.datacite.password)
         @client ||= Datacite::Client.new(host: host, username: username, password: password)
diff --git a/spec/services/datacore/doi_metadata_service_spec.rb b/spec/services/datacore/doi_metadata_service_spec.rb
new file mode 100644
index 00000000..7e15c2fe
--- /dev/null
+++ b/spec/services/datacore/doi_metadata_service_spec.rb
@@ -0,0 +1,245 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe Datacore::DoiMetadataService do
+  let(:work) { FactoryBot.create(:data_set, subject: subjects, contributor: contributors) }
+  let(:subjects) { ['subject1', 'subject2'] }
+  let(:contributors) { ['contributor1', 'contributor2'] }
+  let(:service) { described_class.new(work: work) }
+
+  describe "#metadata" do
+    it "returns #full_metadata" do
+      expect(service).to receive(:full_metadata)
+      expect(service.metadata)
+    end
+    it "caches @metadata" do
+      expect(service.instance_variable_get(:@metadata)).to be_nil
+      expect(service.metadata)
+      expect(service.instance_variable_get(:@metadata)).not_to be_nil
+    end
+  end
+
+  describe "#reload" do
+    it "reloads the work" do
+      expect(work).to receive(:reload)
+      service.reload
+    end
+    it "clears out @metadata" do
+      service.metadata
+      expect(service.instance_variable_get(:@metadata)).not_to be_nil
+      service.reload
+      expect(service.instance_variable_get(:@metadata)).to be_nil
+    end
+  end
+
+  describe "#basic_metadata" do
+    it "returns a schema-compliant Hash" do
+      basic_metadata = service.basic_metadata
+      expect(basic_metadata).to be_a Hash
+      expect(basic_metadata.keys).to eq service.class.const_get(:BASIC_KEYS)
+      expect(basic_metadata[:creators].first.keys).to eq [:name]
+      expect(basic_metadata[:titles].first.keys).to eq [:title]
+      expect(basic_metadata[:publisher]).to eq described_class.const_get(:PUBLISHER)
+      expect(basic_metadata[:publicationYear]).to eq Date.today.year.to_s
+      expect(basic_metadata[:types]).to eq({ resourceTypeGeneral: described_class.const_get(:RESOURCE_TYPE) })
+      expect(basic_metadata[:url]).to match /http.*#{work.id}/
+    end
+  end
+
+  describe "#expanded_metadata" do
+    context "with implicit include_empty: false" do
+      it "returns a populated Hash" do
+        expanded_metadata = service.expanded_metadata
+        expect(expanded_metadata).to be_a Hash
+        expect(expanded_metadata.values).to be_all(&:present?)
+        expect(service.class.const_get(:ADDITIONAL_KEYS)).to include(*expanded_metadata.keys)
+        expect(expanded_metadata[:subjects].map(&:values).flatten.sort).to eq subjects
+        expect(expanded_metadata[:contributors].map { |v| v[:name] }.flatten.sort).to eq contributors
+        expect(expanded_metadata[:alternateIdentifiers][:alternateIdentifierType]).to eq 'DataCORE internal ID'
+        expect(expanded_metadata[:alternateIdentifiers][:alternateIdentifier]).to eq work.id
+      end
+    end
+    context "with explicit include_empty: true" do
+      it "returns a Hash including empty values" do
+        without_empty = service.expanded_metadata
+        with_empty = service.expanded_metadata(include_empty: true)
+        expect(with_empty.size).to be > without_empty.size
+        expect(with_empty.values.any?(&:empty?)).to eq true
+      end
+    end
+  end
+
+  describe "#full_metadata" do
+    it "returns basic and expanded metadata, merged" do
+      expect(service.full_metadata).to eq service.basic_metadata.merge(service.expanded_metadata)
+    end
+  end
+
+  describe "#dates" do
+    context "with a date_uploaded" do
+      before { work.date_uploaded = DateTime.now }
+      it "includes a Submitted entry" do
+        expect(work.date_uploaded).to be_present
+        expect(service.dates.map { |d| d[:dateType] }).to include 'Submitted'
+      end
+    end
+    context "with a date_modified" do
+      before { work.date_modified = DateTime.now }
+      it "includes an Updated entry" do
+        expect(work.date_modified).to be_present
+        expect(service.dates.map { |d| d[:dateType] }).to include 'Updated'
+      end
+    end
+    context "with date_coverage" do
+      before { work.date_coverage = 'date coverage' }
+      it "includes a Collected entry" do
+        expect(service.dates.map { |d| d[:dateType] }).to include 'Collected'
+      end
+    end
+    context "without date values" do
+      it "returns an empty Array" do
+        expect(work.date_uploaded).to be_nil
+        expect(work.date_modified).to be_nil
+        expect(work.date_coverage).to be_nil
+        expect(service.dates).to be_empty
+      end
+    end
+  end
+
+  describe "#descriptions" do
+    context "with work.description" do
+      before { work.description = ['desc1', 'desc2'] }
+      it "includes Other entries" do
+        expect(work.description).to be_present
+        expect(service.descriptions.map { |d| d[:descriptionType] }).to include 'Other'
+      end
+    end
+    context "includes Abstract entries" do
+      before { work.description_abstract = ['abstract1', 'abstract2'] }
+      it "includes Other entries" do
+        expect(work.description_abstract).to be_present
+        expect(service.descriptions.map { |d| d[:descriptionType] }).to include 'Abstract'
+      end
+    end
+    context "with methodology" do
+      before { work.methodology = 'methodology1' }
+      it "includes a Methods entry" do
+        expect(service.descriptions.map { |d| d[:descriptionType] }).to include 'Methods'
+      end
+    end
+    context "without description values" do
+      before { work.description = [] }
+      before { work.methodology = nil }
+      it "returns an empty Array" do
+        expect(work.description).to be_empty
+        expect(work.description_abstract).to be_empty
+        expect(work.methodology).to be_nil
+        expect(service.descriptions).to be_empty
+      end
+    end
+  end
+
+  describe "#funding" do
+    context "with work.fundedby" do
+      before { work.fundedby = ['fund1', 'fund2'] }
+      it "returns funding sources" do
+        expect(service.funding.map(&:values).flatten.sort).to eq work.fundedby.sort
+      end
+    end
+    context "with work.fundedby and work.fundedby_other" do
+      before { work.fundedby = ['Other Funding Agency'] }
+      before { work.fundedby_other = ['other1', 'other2'] }
+      it "returns funding sources, removing Other Funding Agency" do
+        expect(service.funding.map(&:values).flatten.sort).to eq work.fundedby_other.sort
+      end
+    end
+    context "without fundedby.* fields" do
+      it "returns an empty Array" do
+        expect(work.fundedby).to be_empty
+        expect(work.fundedby_other).to be_empty
+        expect(service.funding).to be_empty
+      end
+    end
+  end
+
+  describe "#geo_location" do
+    context "with geo_location_place" do
+      before { work.geo_location_place = 'a place' }
+      it "returns a geoLocationPlace" do
+        expect(service.geo_location.map(&:keys).flatten).to include :geoLocationPlace
+      end
+    end
+    context "with geo_location_box" do
+      before { work.geo_location_box = '1, 2, 3, 4' }
+      it "returns a geoLocationBox" do
+        expect(service.geo_location.map(&:keys).flatten).to include :geoLocationBox
+      end
+    end
+    context "without geo_location values" do
+      it "returns an empty Array" do
+        expect(work.geo_location_place).to be_nil
+        expect(work.geo_location_box).to be_nil
+        expect(service.geo_location).to be_empty
+      end
+    end
+  end
+
+  describe "#geo_location_box" do
+    context "without work.geo_location_box present" do
+      before { work.geo_location_box = nil }
+      it "returns nil" do
+        expect(service.geo_location_box).to be_nil
+      end
+    end
+    context "with invalid work.geo_location_box present" do
+      before { work.geo_location_box = '1 2 3' }
+      it "returns nil" do
+        expect(service.geo_location_box).to be_nil
+      end
+    end
+    context "with valid work.geo_location_box present" do
+      let(:values) { %w[1 2.1 -3 4] }
+      before { work.geo_location_box = values.join(', ') }
+      it "returns a formatted Hash" do
+        expect(service.geo_location_box).to be_a Hash
+        expect(service.geo_location_box.keys).to eq [:southBoundLatitude, :westBoundLongitude, :northBoundLatitude, :eastBoundLongitude]
+        expect(service.geo_location_box.values).to eq values
+      end
+    end
+  end
+
+  describe "#language" do
+    context "with a work language" do
+      before { work.language = ['lang1', 'lang2'] }
+      it "returns the work language" do
+        expect(service.language).to eq 'lang1'
+      end
+    end
+    context "without a work language" do
+      before { work.language = nil }
+      it "returns default value: en" do
+        expect(service.language).to eq 'en'
+      end
+    end
+  end
+
+  describe "#rights_license" do
+    it "returns an populated array" do
+      expect(service.rights_license).to be_a Array
+      expect(service.rights_license).not_to be_empty
+    end
+    context "without a rights_license_other" do
+      it "returns a single value" do
+        expect(work.rights_license_other).to be_nil
+        expect(service.rights_license.size).to eq 1
+      end
+    end
+    context "with a rights_license_other" do
+      before { work.rights_license_other = 'other license' }
+      it "returns a second value" do
+        expect(service.rights_license.size).to eq 2
+      end
+    end
+  end
+end
diff --git a/spec/services/datacore/doi_minting_service_spec.rb b/spec/services/datacore/doi_minting_service_spec.rb
index df147a0b..16e30c33 100644
--- a/spec/services/datacore/doi_minting_service_spec.rb
+++ b/spec/services/datacore/doi_minting_service_spec.rb
@@ -105,4 +105,19 @@
       end
     end
   end
+
+  describe "metadata_service" do
+    let(:doi) { namespaced_doi }
+    it "returns a distinct DoiMetadataService" do
+      expect(service.metadata_service).to be_an_instance_of ::Datacore::DoiMetadataService
+    end
+    describe "receives delegated methods:" do
+      [:basic_metadata, :expanded_metadata, :full_metadata, :metadata].each do |method|
+        it "#{method}" do
+          expect(service.metadata_service).to receive method
+          service.send(method)
+        end
+      end
+    end
+  end
 end