diff --git a/app/controllers/admin/admins_controller.rb b/app/controllers/admin/admins_controller.rb
index 10cadf06f..0120049cf 100644
--- a/app/controllers/admin/admins_controller.rb
+++ b/app/controllers/admin/admins_controller.rb
@@ -1,5 +1,10 @@
 class Admin::AdminsController < Admin::UsersController
   before_action :find_resource, except: [:index, :new, :create, :login_as_assessor, :login_as_user]
+
+  expose(:collaborators) do
+    nil
+  end
+
   def index
     params[:search] ||= AdminSearch::DEFAULT_SEARCH
     params[:search].permit!
diff --git a/app/controllers/admin/assessors_controller.rb b/app/controllers/admin/assessors_controller.rb
index b232f3ddf..35720c3f2 100644
--- a/app/controllers/admin/assessors_controller.rb
+++ b/app/controllers/admin/assessors_controller.rb
@@ -15,6 +15,10 @@ class Admin::AssessorsController < Admin::UsersController
       :bulk_deactivate_dt,
     ]
 
+  expose(:collaborators) do
+    nil
+  end
+
   def index
     params[:search] ||= AssessorSearch::DEFAULT_SEARCH
     params[:search].permit!
diff --git a/app/controllers/admin/judges_controller.rb b/app/controllers/admin/judges_controller.rb
index 558eeba3a..d0c1df729 100644
--- a/app/controllers/admin/judges_controller.rb
+++ b/app/controllers/admin/judges_controller.rb
@@ -1,4 +1,8 @@
 class Admin::JudgesController < Admin::UsersController
+  expose(:collaborators) do
+    nil
+  end
+
   def index
     params[:search] ||= JudgeSearch::DEFAULT_SEARCH
     params[:search].permit!
diff --git a/app/controllers/admin/users/collaborators_controller.rb b/app/controllers/admin/users/collaborators_controller.rb
new file mode 100644
index 000000000..90226c958
--- /dev/null
+++ b/app/controllers/admin/users/collaborators_controller.rb
@@ -0,0 +1,52 @@
+class Admin::Users::CollaboratorsController < Admin::BaseController
+  expose(:user) do
+    User.find(params[:user_id])
+  end
+
+  expose(:collaborator) do
+    User.find(params[:collaborator_id])
+  end
+
+  expose(:search_users) do
+    AdminActions::SearchCollaboratorCandidates.new(existing_collaborators: user.account.users, params: search_params)
+  end
+
+  expose(:add_collaborator_interactor) do
+    AdminActions::AddCollaborator.new(account: user.account, collaborator:, params: create_params)
+  end
+
+  expose(:candidates) do
+    search_users.candidates
+  end
+
+  def search
+    authorize user, :can_add_collaborators_to_account?
+    search_users.run if search_users.valid?
+  end
+
+  def create
+    authorize user, :can_add_collaborators_to_account?
+
+    add_collaborator_interactor.run.tap do |result|
+      if result.success?
+        redirect_to edit_admin_user_path(user), notice: "#{collaborator.email} successfully added to Collaborators!"
+      else
+        redirect_to edit_admin_user_path(user), notice: "#{collaborator.email} could not be added to Collaborators: #{result.error_messages}"
+      end
+    end
+  end
+
+  private
+
+  def create_params
+    params.require(:user).permit(:transfer_form_answers, :new_owner_id, :role).tap do |p|
+      p[:transfer_form_answers] = ActiveModel::Type::Boolean.new.cast(p[:transfer_form_answers])
+    end
+  end
+
+  def search_params
+    return if params[:search].blank?
+
+    params.require(:search).permit(:query)
+  end
+end
diff --git a/app/controllers/admin/users_controller.rb b/app/controllers/admin/users_controller.rb
index 699a28d68..2ececa26b 100644
--- a/app/controllers/admin/users_controller.rb
+++ b/app/controllers/admin/users_controller.rb
@@ -1,6 +1,10 @@
 class Admin::UsersController < Admin::BaseController
   before_action :find_resource, except: [:index, :new, :create]
 
+  expose(:collaborators) do
+    @resource.account.collaborators_without(@resource)
+  end
+
   def index
     params[:search] ||= UserSearch::DEFAULT_SEARCH
     params[:search].permit!
diff --git a/app/policies/user_policy.rb b/app/policies/user_policy.rb
index 447b9822f..d95c723ff 100644
--- a/app/policies/user_policy.rb
+++ b/app/policies/user_policy.rb
@@ -1,5 +1,5 @@
 class UserPolicy < ApplicationPolicy
-  %w[index? update? create? show? new?].each do |method|
+  %w[index? update? create? show? new? can_add_collaborators_to_account?].each do |method|
     define_method method do
       admin?
     end
diff --git a/app/views/admin/users/_fields_collaborators.html.slim b/app/views/admin/users/_fields_collaborators.html.slim
index 3816ed319..96d172afd 100644
--- a/app/views/admin/users/_fields_collaborators.html.slim
+++ b/app/views/admin/users/_fields_collaborators.html.slim
@@ -1,6 +1,4 @@
-/ TODO collaborators new/delete, also the collaborators variable
 - if action_name == "edit"
-  - collaborators = resource.account.collaborators_without(resource)
   - if collaborators.any?
     = render "admin/collaborators/list", collaborators: collaborators
   - else
@@ -11,3 +9,6 @@
             br
             p.p-empty This user has not added any collaborators.
             br
+  
+  - if policy(resource).can_add_collaborators_to_account?
+    = render "admin/users/collaborators/search_form", resource: resource
diff --git a/app/views/admin/users/collaborators/_search_form.html.slim b/app/views/admin/users/collaborators/_search_form.html.slim
new file mode 100644
index 000000000..61b926fae
--- /dev/null
+++ b/app/views/admin/users/collaborators/_search_form.html.slim
@@ -0,0 +1,27 @@
+= simple_form_for :search,
+                  url: search_admin_user_collaborators_url(resource),
+                  remote: true,
+                  method: :get,
+                  as: nil,
+                  html: { class: "admin-search-collaborators-form" } do |f|
+
+  .form-container
+    label.form-label for="admin-search-collaborators-query" Add collaborator
+
+    .alert.alert-danger.hidden.js-admin-search-collaborators-error-box role="alert"
+
+    .form-block
+      .row
+        .col-md-12
+          = f.input :query,
+                    as: :string,
+                    label: false,
+                    input_html: { class: "form-control", id: "admin-search-collaborators-query" },
+                    wrapper_html: { class: 'pull-left col-md-10 admin-search-collaborators-query' },
+                    placeholder: "Type part of email, first name or last name"
+
+          .text-right
+            = f.submit "Search", class: "btn btn-primary pull-right"
+    .clear
+
+ul.list-unstyled.list-actions.hidden.js-admin-search-collaborators-results-box
diff --git a/app/views/admin/users/collaborators/_search_results.html.slim b/app/views/admin/users/collaborators/_search_results.html.slim
new file mode 100644
index 000000000..d052be58a
--- /dev/null
+++ b/app/views/admin/users/collaborators/_search_results.html.slim
@@ -0,0 +1,9 @@
+- if candidates.present?
+  - candidates.each do |candidate|
+    li.list-group-item id="user_#{candidate.id}"
+      p.pull-right
+        = link_to "#{candidate.full_name} (#{candidate.email})", edit_admin_user_path(candidate)
+
+      br
+
+      p= render "admin/users/collaborators/transfer_form", collaborator: candidate
diff --git a/app/views/admin/users/collaborators/_transfer_form.html.slim b/app/views/admin/users/collaborators/_transfer_form.html.slim
new file mode 100644
index 000000000..a9f6382cf
--- /dev/null
+++ b/app/views/admin/users/collaborators/_transfer_form.html.slim
@@ -0,0 +1,29 @@
+= simple_form_for :user, url: admin_user_collaborators_url(collaborator_id: collaborator.id), method: :post do |f|    
+    - if collaborator&.account.collaborators_without(collaborator).any? && collaborator.account.owner == collaborator
+        .question-group
+            h3 = f.label :new_owner_id, label: "Owner"
+            .row
+                .col-sm-6
+                    = f.select :new_owner_id,
+                       collaborator.account.collaborators_without(collaborator).map { |u| [u.email, u.id] },
+                       { include_blank: 'Select New Owner…' },
+                       { class: "form-control" }
+
+    .question-group
+        h3 = f.label :role, label: "Role"
+        .row
+            .col-sm-4
+                = f.select :role,
+                           User::POSSIBLE_ROLES.map { |r| [r.humanize, r] },
+                           { selected: collaborator.role },
+                           { class: "form-control" }
+
+    - if collaborator.form_answers.any?
+        .question-group
+            h3 = f.label :transfer_form_answers, label: "Transfer existing Application/s"
+            .row
+                .col-sm-2
+                    = f.check_box :transfer_form_answers, value: true
+
+    br
+    = f.submit "Transfer", class: "btn btn-secondary"
diff --git a/app/views/admin/users/collaborators/search.js.slim b/app/views/admin/users/collaborators/search.js.slim
new file mode 100644
index 000000000..267e91b09
--- /dev/null
+++ b/app/views/admin/users/collaborators/search.js.slim
@@ -0,0 +1,6 @@
+- if search_users.valid?
+  | $('.js-admin-search-collaborators-results-box').html("#{j render("search_results")}").removeClass("hidden");
+  | $(".js-admin-search-collaborators-error-box").addClass("hidden");
+- else
+  | $('.js-admin-search-collaborators-results-box').addClass("hidden");
+  | $(".js-admin-search-collaborators-error-box").text("#{search_users.error.html_safe}").removeClass("hidden");
diff --git a/app/views/admin/users/edit.html.slim b/app/views/admin/users/edit.html.slim
index fb5c4e9ad..ff353e103 100644
--- a/app/views/admin/users/edit.html.slim
+++ b/app/views/admin/users/edit.html.slim
@@ -3,3 +3,13 @@
     = "Edit #{controller_name == "users" ? "applicant" : controller_name.singularize}"
 
 = render 'form', resource: @resource
+
+- if collaborators
+  .panel.panel-default[data-controller="element-focus"]
+    .panel-heading id="section-collaborators-header"
+      h2.panel-title
+        a.collapsed data-toggle="collapse" data-parent="#user-form-panel" href="#section-collaborators" aria-expanded="false" aria-controls="section-collaborators" data-element-focus-target="reveal"
+          ' Collaborators
+    #section-collaborators.section-collaborators.panel-collapse.collapse[aria-labelledby="section-collaborators-header" data-element-scroll-target="accordion"]
+      .panel-body
+        = render "fields_collaborators", resource: @resource
diff --git a/config/routes.rb b/config/routes.rb
index 644fbbbf6..6e93fb78e 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -263,6 +263,10 @@
         patch :unlock
         post :scan_via_debounce_api
       end
+
+      resources :collaborators, only: [:create], module: :users do
+        get :search, on: :collection
+      end
     end
 
     resources :collaborator_deletion, only: [:destroy]
diff --git a/spec/features/admin/users/collaborators_spec.rb b/spec/features/admin/users/collaborators_spec.rb
new file mode 100644
index 000000000..fc1067bb2
--- /dev/null
+++ b/spec/features/admin/users/collaborators_spec.rb
@@ -0,0 +1,155 @@
+require "rails_helper"
+
+describe "Collaborators", '
+As a an Admin
+I want to be able to add collaborators to any account
+So that they can collaborate applications
+', js: true do
+  include ActiveJob::TestHelper
+
+  let!(:admin) { create(:admin) }
+  let(:existing_user) { create(:user, :completed_profile) }
+
+  before do
+    login_admin admin
+    visit edit_admin_user_path(existing_user)
+  end
+
+  def search_for_user(email)
+    find("a[aria-controls='section-collaborators']").click
+
+    within(".admin-search-collaborators-form") do
+      fill_in "search[query]", with: email.to_s[2..-2]
+      first("input[type='submit']").click
+    end
+  end
+
+  describe "Add Collaborator" do
+    let(:email) { generate(:email) }
+    let!(:user) { create(:user, email: email) }
+    let(:form_answers) { [] }
+
+    context "with the Account Admin role" do
+      let(:role) { "Account admin" }
+
+      before do
+        search_for_user(email)
+        transfer_user(role)
+      end
+
+      it "should transfer the user with the correct role" do
+        expect(page).to have_content("#{email} successfully added to Collaborators!")
+        expect(page).to have_content("#{email} successfully added to Collaborators!")
+        login_as existing_user
+        click_link "Collaborators"
+        expect_to_see_user(user, role: "Admin and collaborator")
+      end
+    end
+
+    context "with the regular role" do
+      let(:role) { "Regular" }
+
+      before do
+        search_for_user(email)
+        transfer_user(role)
+      end
+
+      it "should transfer the user with the correct role" do
+        expect(page).to have_content("#{email} successfully added to Collaborators!")
+        expect(page).to have_content("#{email} successfully added to Collaborators!")
+        login_as existing_user
+        click_link "Collaborators"
+        expect_to_see_user(user, role: "Collaborator only")
+      end
+    end
+
+    context "with form_answers" do
+      let!(:form_answers) { create_list(:form_answer, 3, user: user, account: user.account) }
+      let(:role) { "Account admin" }
+      context "when transferring form_answers" do
+        before do
+          search_for_user(email)
+          transfer_user(role, transfer_form_answers: true)
+        end
+
+        it "should transfer the form_answers and user with the correct role" do
+          expect(page).to have_content("#{email} successfully added to Collaborators!")
+          login_as existing_user, scope: :user
+          click_link "Collaborators"
+          expect_to_see_user(user, role: "Admin and collaborator")
+          expect(existing_user.account.reload.form_answers).to eq(form_answers)
+          expect(user.reload.form_answers).to eq(form_answers)
+        end
+      end
+
+      context "when not transferring form_answers" do
+        context "with no other users" do
+          before do
+            search_for_user(email)
+            transfer_user(role, transfer_form_answers: false)
+          end
+
+          it "should transfer the user with the correct role" do
+            expect(page).to have_content("#{email} successfully added to Collaborators!")
+            login_as existing_user
+            click_link "Collaborators"
+            expect_to_see_user(user, role: "Admin and collaborator")
+            expect(existing_user.account.reload.form_answers).to eq([])
+            expect(user.reload.form_answers).to eq([])
+          end
+        end
+
+        context "with other users" do
+          let!(:other_user) { create(:user, :completed_profile, account: user.account) }
+
+          before do
+            search_for_user(email)
+            transfer_user(role, transfer_form_answers: false, new_owner: other_user)
+          end
+
+          it "should transfer the user with the correct role" do
+            expect(page).to have_content("#{email} successfully added to Collaborators!")
+            login_as existing_user
+            click_link "Collaborators"
+            expect_to_see_user(user, role: "Admin and collaborator")
+            expect(existing_user.account.reload.form_answers).to eq([])
+            expect(user.reload.form_answers).to eq([])
+            expect(other_user.reload.form_answers).to eq(form_answers)
+          end
+        end
+
+        context "when the form_answers are in progress" do
+          let!(:form_answers) { create_list(:form_answer, 3, :development, user: user, account: user.account) }
+
+          before do
+            search_for_user(email)
+            transfer_user(role, transfer_form_answers: false)
+          end
+
+          it "should display an error" do
+            expect(page).to have_content(
+              "#{user.email} could not be added to Collaborators: User has applications in progress, and there are no other users on the account to transfer them to",
+            )
+          end
+        end
+      end
+    end
+  end
+
+  def expect_to_see_user(user, role:)
+    within "#user_#{user.id}" do
+      expect(page).to have_content(user.full_name)
+      expect(page).to have_content(role)
+    end
+  end
+
+  def transfer_user(role, transfer_form_answers: false, new_owner: nil)
+    within(".js-admin-search-collaborators-results-box") do
+      select role, from: "user[role]"
+      select new_owner.email, from: "user[new_owner_id]" if new_owner
+      check "user[transfer_form_answers]" if transfer_form_answers
+
+      click_button "Transfer"
+    end
+  end
+end