diff --git a/atst/domain/applications.py b/atst/domain/applications.py
index 968bbb91..e0884f55 100644
--- a/atst/domain/applications.py
+++ b/atst/domain/applications.py
@@ -1,13 +1,20 @@
 from sqlalchemy.orm.exc import NoResultFound
 
-from atst.database import db
 from . import BaseDomainClass
+from atst.database import db
 from atst.domain.application_roles import ApplicationRoles
 from atst.domain.environment_roles import EnvironmentRoles
 from atst.domain.environments import Environments
 from atst.domain.exceptions import NotFoundError
+from atst.domain.invitations import ApplicationInvitations
 from atst.domain.users import Users
-from atst.models import Application, ApplicationRole, ApplicationRoleStatus
+from atst.models import (
+    Application,
+    ApplicationRole,
+    ApplicationRoleStatus,
+    EnvironmentRole,
+)
+from atst.utils import first_or_none
 
 
 class Applications(BaseDomainClass):
@@ -104,6 +111,52 @@ class Applications(BaseDomainClass):
 
         return application_role
 
+    @classmethod
+    def invite(
+        cls,
+        application,
+        inviter,
+        user_data,
+        permission_sets_names=None,
+        environment_roles_data=None,
+    ):
+        permission_sets_names = permission_sets_names or []
+        permission_sets = ApplicationRoles._permission_sets_for_names(
+            permission_sets_names
+        )
+        app_role = ApplicationRole(
+            application=application, permission_sets=permission_sets
+        )
+
+        db.session.add(app_role)
+
+        for env_role_data in environment_roles_data:
+            env_role_name = env_role_data.get("role")
+            environment_id = env_role_data.get("environment_id")
+            if env_role_name is not None:
+                # pylint: disable=cell-var-from-loop
+                environment = first_or_none(
+                    lambda e: str(e.id) == str(environment_id), application.environments
+                )
+                if environment is None:
+                    raise NotFoundError("environment")
+                else:
+                    env_role = EnvironmentRole(
+                        application_role=app_role,
+                        environment=environment,
+                        role=env_role_name,
+                    )
+                    db.session.add(env_role)
+
+        invitation = ApplicationInvitations.create(
+            inviter=inviter, role=app_role, member_data=user_data
+        )
+        db.session.add(invitation)
+
+        db.session.commit()
+
+        return invitation
+
     @classmethod
     def remove_member(cls, application, user_id):
         application_role = ApplicationRoles.get(
diff --git a/atst/models/application_role.py b/atst/models/application_role.py
index db08d639..7e709f5f 100644
--- a/atst/models/application_role.py
+++ b/atst/models/application_role.py
@@ -59,12 +59,17 @@ class ApplicationRole(
         ),
     )
 
+    @property
+    def latest_invitation(self):
+        if self.invitations:
+            return self.invitations[-1]
+
     @property
     def user_name(self):
         if self.user:
             return self.user.full_name
-        else:
-            return None
+        elif self.latest_invitation:
+            return self.latest_invitation.user_name
 
     def __repr__(self):
         return "<ApplicationRole(application='{}', user_id='{}', id='{}', permissions={})>".format(
diff --git a/atst/routes/applications/team.py b/atst/routes/applications/team.py
index b48c82a0..38ffeb5b 100644
--- a/atst/routes/applications/team.py
+++ b/atst/routes/applications/team.py
@@ -13,8 +13,8 @@ from atst.domain.users import Users
 from atst.forms.application_member import NewForm as NewMemberForm
 from atst.forms.team import TeamForm
 from atst.models import Permissions
-from atst.services.invitation import Invitation as InvitationService
 from atst.utils.flash import formatted_flash as flash
+from atst.queue import queue
 
 
 def get_form_permission_value(member, edit_perm_set):
@@ -125,6 +125,17 @@ def update_team(application_id):
         return (render_team_page(application), 400)
 
 
+def send_application_invitation(invitee_email, inviter_name, token):
+    body = render_template(
+        "emails/application/invitation.txt", owner=inviter_name, token=token
+    )
+    queue.send_mail(
+        [invitee_email],
+        "{} has invited you to a JEDI cloud application".format(inviter_name),
+        body,
+    )
+
+
 @applications_bp.route("/application/<application_id>/members/new", methods=["POST"])
 @user_can(
     Permissions.CREATE_APPLICATION_MEMBER, message="create new application member"
@@ -135,19 +146,19 @@ def create_member(application_id):
 
     if form.validate():
         try:
-            member = Applications.create_member(
-                application,
-                form.user_data.data,
-                permission_sets=form.permission_sets.data,
+            invite = Applications.invite(
+                application=application,
+                inviter=g.current_user,
+                user_data=form.user_data.data,
+                permission_sets_names=form.permission_sets.data,
                 environment_roles_data=form.environment_roles.data,
             )
 
-            invite_service = InvitationService(
-                g.current_user, member, form.user_data.data.get("email")
+            send_application_invitation(
+                invite.email, g.current_user.full_name, invite.token
             )
-            invite_service.invite()
 
-            flash("new_portfolio_member", new_member=member)
+            flash("new_application_member", user_name=invite.user_name)
 
         except AlreadyExistsError:
             return render_template(
diff --git a/atst/utils/flash.py b/atst/utils/flash.py
index 47efa58b..a7d5b52d 100644
--- a/atst/utils/flash.py
+++ b/atst/utils/flash.py
@@ -67,7 +67,7 @@ MESSAGES = {
     "new_application_member": {
         "title_template": translate("flash.success"),
         "message_template": """
-          <p>{{ "flash.new_application_member" | translate({ "user_name": new_member.user_name }) }}</p>
+          <p>{{ "flash.new_application_member" | translate({ "user_name": user_name }) }}</p>
         """,
         "category": "success",
     },
@@ -179,7 +179,7 @@ MESSAGES = {
     "update_portfolio_members": {
         "title_template": "Success!",
         "message_template": """
-            <p>You have successfully updated access permissions for members of {{ portfolio.name }}.</p>
+        <p>You have successfully updated access permissions for members of {{ portfolio.name }}.</p>
         """,
         "category": "success",
     },
diff --git a/tests/domain/test_applications.py b/tests/domain/test_applications.py
index 46da9bde..767bc8b8 100644
--- a/tests/domain/test_applications.py
+++ b/tests/domain/test_applications.py
@@ -189,3 +189,48 @@ def test_remove_member():
         )
         is None
     )
+
+
+def test_invite():
+    application = ApplicationFactory.create()
+    env1 = EnvironmentFactory.create(application=application)
+    env2 = EnvironmentFactory.create(application=application)
+    user_data = UserFactory.dictionary()
+    permission_sets_names = [PermissionSets.EDIT_APPLICATION_TEAM]
+
+    invitation = Applications.invite(
+        application=application,
+        inviter=application.portfolio.owner,
+        user_data=user_data,
+        permission_sets_names=permission_sets_names,
+        environment_roles_data=[
+            {"environment_id": env1.id, "role": CSPRole.BASIC_ACCESS.value},
+            {"environment_id": env2.id, "role": None},
+        ],
+    )
+
+    member_role = invitation.role
+    assert invitation.dod_id == user_data["dod_id"]
+    # view application AND edit application team
+    assert len(member_role.permission_sets) == 2
+
+    env_roles = member_role.environment_roles
+    assert len(env_roles) == 1
+    assert env_roles[0].environment == env1
+
+
+def test_invite_to_nonexistent_environment():
+    application = ApplicationFactory.create()
+    env1 = EnvironmentFactory.create(application=application)
+    user_data = UserFactory.dictionary()
+
+    with pytest.raises(NotFoundError):
+        Applications.invite(
+            application=application,
+            inviter=application.portfolio.owner,
+            user_data=user_data,
+            environment_roles_data=[
+                {"environment_id": env1.id, "role": CSPRole.BASIC_ACCESS.value},
+                {"environment_id": uuid4(), "role": CSPRole.BASIC_ACCESS.value},
+            ],
+        )
diff --git a/tests/routes/applications/test_team.py b/tests/routes/applications/test_team.py
index fa725695..d7abec06 100644
--- a/tests/routes/applications/test_team.py
+++ b/tests/routes/applications/test_team.py
@@ -1,10 +1,10 @@
-import pytest
 import uuid
 from flask import url_for
 
 from atst.domain.permission_sets import PermissionSets
 from atst.models import CSPRole
 from atst.forms.data import ENV_ROLE_NO_ACCESS as NO_ACCESS
+from atst.queue import queue
 
 from tests.factories import *
 
@@ -145,7 +145,8 @@ def test_update_team_revoke_environment_access(client, user_session, db, session
     assert not session.query(env_role_exists).scalar()
 
 
-def test_create_member(client, user_session):
+def test_create_member(client, user_session, session):
+    queue_length = len(queue.get_queue())
     user = UserFactory.create()
     application = ApplicationFactory.create(
         environments=[{"name": "Naboo"}, {"name": "Endor"}]
@@ -179,14 +180,18 @@ def test_create_member(client, user_session):
         _external=True,
     )
     assert response.location == expected_url
-    assert len(user.application_roles) == 1
-    assert user.application_roles[0].application == application
-    environment_roles = [
-        er for ar in user.application_roles for er in ar.environment_roles
-    ]
+    assert len(application.roles) == 1
+    environment_roles = application.roles[0].environment_roles
     assert len(environment_roles) == 1
     assert environment_roles[0].environment == env
 
+    invitation = (
+        session.query(ApplicationInvitation).filter_by(dod_id=user.dod_id).one()
+    )
+    assert invitation.role.application == application
+
+    assert len(queue.get_queue()) == queue_length + 1
+
 
 def test_remove_member_success(client, user_session):
     user = UserFactory.create()