diff --git a/.do/app.yaml b/.do/app.yaml
index 7acd69b8..42ceb162 100644
--- a/.do/app.yaml
+++ b/.do/app.yaml
@@ -153,3 +153,35 @@ workers:
   name: background-tasks
   run_command: php .do/run-background-tasks.php
   source_dir: /
+
+jobs:
+- environment_slug: php
+  github:
+    branch: 9.x
+    repo: neurocracy/omnipedia
+  instance_count: 1
+  instance_size_slug: professional-xs
+  kind: PRE_DEPLOY
+  name: pre-deploy
+  run_command: .do/jobs/pre-deploy.sh
+  source_dir: /
+- environment_slug: php
+  github:
+    branch: 9.x
+    repo: neurocracy/omnipedia
+  instance_count: 1
+  instance_size_slug: professional-xs
+  kind: POST_DEPLOY
+  name: post-successful-deploy
+  run_command: .do/jobs/post-successful-deploy.sh
+  source_dir: /
+- environment_slug: php
+  github:
+    branch: 9.x
+    repo: neurocracy/omnipedia
+  instance_count: 1
+  instance_size_slug: professional-xs
+  kind: FAILED_DEPLOY
+  name: post-failed-deploy
+  run_command: .do/jobs/post-failed-deploy.sh
+  source_dir: /
diff --git a/.do/deploy-tasks.sh b/.do/deploy-tasks.sh
deleted file mode 100755
index c5f335d2..00000000
--- a/.do/deploy-tasks.sh
+++ /dev/null
@@ -1,4 +0,0 @@
-#!/bin/bash
-
-# Run any necessary database updates.
-drush -y updb
diff --git a/.do/deploy.template.yaml b/.do/deploy.template.yaml
index 0df2d044..886e85c3 100644
--- a/.do/deploy.template.yaml
+++ b/.do/deploy.template.yaml
@@ -155,3 +155,35 @@ spec:
     name: background-tasks
     run_command: php .do/run-background-tasks.php
     source_dir: /
+
+  jobs:
+  - environment_slug: php
+    github:
+      branch: 9.x
+      repo: neurocracy/omnipedia
+    instance_count: 1
+    instance_size_slug: professional-xs
+    kind: PRE_DEPLOY
+    name: pre-deploy
+    run_command: .do/jobs/pre-deploy.sh
+    source_dir: /
+  - environment_slug: php
+    github:
+      branch: 9.x
+      repo: neurocracy/omnipedia
+    instance_count: 1
+    instance_size_slug: professional-xs
+    kind: POST_DEPLOY
+    name: post-successful-deploy
+    run_command: .do/jobs/post-successful-deploy.sh
+    source_dir: /
+  - environment_slug: php
+    github:
+      branch: 9.x
+      repo: neurocracy/omnipedia
+    instance_count: 1
+    instance_size_slug: professional-xs
+    kind: FAILED_DEPLOY
+    name: post-failed-deploy
+    run_command: .do/jobs/post-failed-deploy.sh
+    source_dir: /
diff --git a/.do/jobs/post-failed-deploy.sh b/.do/jobs/post-failed-deploy.sh
new file mode 100755
index 00000000..246957d4
--- /dev/null
+++ b/.do/jobs/post-failed-deploy.sh
@@ -0,0 +1,9 @@
+#!/bin/bash
+
+# Disable maintenance mode.
+#
+# The database is shared between all deploys, even failed ones, so we need to
+# turn off maintenance mode so that the live copy of the site (not this failed
+# deploy) is publicly accessible again.
+drush maint:set 0
+echo "=> Maintenance mode has been turned off"
diff --git a/.do/jobs/post-successful-deploy.sh b/.do/jobs/post-successful-deploy.sh
new file mode 100755
index 00000000..1b26fbad
--- /dev/null
+++ b/.do/jobs/post-successful-deploy.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+
+# Disable maintenance mode.
+drush maint:set 0
+echo "=> Maintenance mode has been turned off"
diff --git a/.do/jobs/pre-deploy.sh b/.do/jobs/pre-deploy.sh
new file mode 100755
index 00000000..a9acad1c
--- /dev/null
+++ b/.do/jobs/pre-deploy.sh
@@ -0,0 +1,8 @@
+#!/bin/bash
+
+# Enable maintenance mode.
+drush maint:set 1
+echo "=> Maintenance mode has been turned on"
+
+# Run any necessary database updates.
+drush -y updb
diff --git a/.do/run-background-tasks.php b/.do/run-background-tasks.php
index 567d0453..3d9b4b74 100644
--- a/.do/run-background-tasks.php
+++ b/.do/run-background-tasks.php
@@ -18,14 +18,6 @@
   (new WorkerProcess(__DIR__ . '/run-common.sh'))->start();
 });
 
-# Run deploy tasks. Note that this assumes only one background tasks worker.
-#
-# @todo Rework this to ensure it only runs once on deploy, either as an App
-#   Platform job or using some form of locking.
-$loop->futureTick(function(): void {
-  (new WorkerProcess(__DIR__ . '/deploy-tasks.sh'))->start();
-});
-
 // Run cron every 15 minutes.
 $loop->addPeriodicTimer(900, function(): void {
   (new WorkerProcess('drush cron'))->start();