diff --git a/taskcluster/ci/config.yml b/taskcluster/ci/config.yml
index b8a5a8a39f59..4f72cdd0374a 100644
--- a/taskcluster/ci/config.yml
+++ b/taskcluster/ci/config.yml
@@ -154,6 +154,7 @@ treeherder:
         'rust': 'Rust checks'
         'Static-Analysis': 'Full tree static-analysis'
         'SS': 'Shadow scheduler'
+        'Sentry': 'Sentry synchronization'
         'test-info': 'Test manifest skip/fail information'
         'condprof': 'Conditioned Profile Builder'
         'doc': 'Documentation'
diff --git a/taskcluster/ci/docker-image/kind.yml b/taskcluster/ci/docker-image/kind.yml
index 98ae59839378..f4892965e911 100644
--- a/taskcluster/ci/docker-image/kind.yml
+++ b/taskcluster/ci/docker-image/kind.yml
@@ -167,6 +167,9 @@ jobs:
     github-sync:
         symbol: I(github-sync)
         parent: debian10-base
+    sentry:
+        symbol: I(sentry)
+        parent: debian10-base
     system-symbols-mac:
         symbol: I(system-symbols-mac)
         parent: debian10-base
diff --git a/taskcluster/ci/sentry/kind.yml b/taskcluster/ci/sentry/kind.yml
new file mode 100644
index 000000000000..bc0e61f949df
--- /dev/null
+++ b/taskcluster/ci/sentry/kind.yml
@@ -0,0 +1,33 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+---
+loader: taskgraph.loader.transform:loader
+
+transforms:
+    - taskgraph.transforms.sentry:transforms
+    - taskgraph.transforms.job:transforms
+    - taskgraph.transforms.task:transforms
+
+jobs:
+    mach-release:
+        description: Inform Sentry of new revisions (aka Mach releases)
+        worker-type: b-linux
+        worker:
+            taskcluster-proxy: true
+            max-run-time: 3600
+            docker-image: {in-tree: sentry}
+            env:
+                HG_PUSHLOG_URL: "{head_repository}/json-pushes?version=2&changeset={head_rev}"
+        scopes:
+            - secrets:get:project/engwf/gecko/3/tokens
+        run:
+            using: run-task
+            checkout: false
+            command: /bin/bash /usr/bin/submit_sentry_release.sh
+        run-on-projects: ['mozilla-central']
+        treeherder:
+            symbol: Sentry(mach-release)
+            platform: other/opt
+            tier: 2
+            kind: other
diff --git a/taskcluster/docker/sentry/Dockerfile b/taskcluster/docker/sentry/Dockerfile
new file mode 100644
index 000000000000..2f606c55298b
--- /dev/null
+++ b/taskcluster/docker/sentry/Dockerfile
@@ -0,0 +1,11 @@
+FROM $DOCKER_IMAGE_PARENT
+LABEL maintainer="Mitchell Hentges mhentges@mozilla.com"
+
+VOLUME  /builds/worker/checkouts
+
+ADD prepare.sh /setup/prepare-docker.sh
+ADD submit_sentry_release.sh /usr/bin/submit_sentry_release.sh
+RUN /bin/bash /setup/prepare-docker.sh && rm -R /setup
+
+# Set a default command useful for debugging
+CMD ["/bin/sh", "--login"]
diff --git a/taskcluster/docker/sentry/prepare.sh b/taskcluster/docker/sentry/prepare.sh
new file mode 100755
index 000000000000..d3d2e3431ec7
--- /dev/null
+++ b/taskcluster/docker/sentry/prepare.sh
@@ -0,0 +1,24 @@
+#!/bin/sh
+
+set -o errexit
+set -o nounset
+set -o pipefail
+set -o xtrace
+
+apt-get -y update
+
+# Install:
+# * curl to fetch sentry-cli
+# * jq to parse hgmo pushlog
+# * pip so we can install yq
+apt-get install -y \
+    curl \
+    jq \
+    python3-pip
+
+# Install yq to parse secrets YAML
+pip3 install yq
+
+# Install sentry-cli to publish releases
+curl -L https://github.com/getsentry/sentry-cli/releases/download/1.63.1/sentry-cli-Linux-x86_64 -o /usr/bin/sentry-cli
+chmod +x /usr/bin/sentry-cli
diff --git a/taskcluster/docker/sentry/submit_sentry_release.sh b/taskcluster/docker/sentry/submit_sentry_release.sh
new file mode 100644
index 000000000000..aadb46debbcd
--- /dev/null
+++ b/taskcluster/docker/sentry/submit_sentry_release.sh
@@ -0,0 +1,29 @@
+#!/bin/bash
+
+set -o nounset
+set -o pipefail
+
+run() {
+    revisions=$(curl "$HG_PUSHLOG_URL" | jq -c -r ".pushes[].changesets | @sh" | tr -d \') || return 1
+    sentry_api_key=$(curl "http://taskcluster/secrets/v1/secret/project/engwf/gecko/3/tokens" | yq -r .sentryToken) || return 1
+    for revision in $revisions; do
+        SENTRY_API_KEY=$sentry_api_key SENTRY_ORG=operations sentry-cli --url https://sentry.prod.mozaws.net/ releases --project mach new "$revision" || return 1
+    done
+}
+
+with_backoff() {
+    failures=0
+    while ! "$@"; do
+        failures=$(( failures + 1 ))
+        if (( failures >= 5 )); then
+            echo "[with_backoff] Unable to succeed after 5 tries, failing the job."
+            return 1
+        else
+            seconds=$(( 2 ** (failures - 1) ))
+            echo "[with_backoff] Retrying in $seconds second(s)"
+            sleep $seconds
+        fi
+    done
+}
+
+with_backoff run
diff --git a/taskcluster/docs/kinds.rst b/taskcluster/docs/kinds.rst
index 549737800553..48866b93b3b5 100644
--- a/taskcluster/docs/kinds.rst
+++ b/taskcluster/docs/kinds.rst
@@ -705,6 +705,10 @@ merge-automation
 ----------------
 Hook-driven tasks that automate "Merge Day" tasks during the release cycle.
 
+sentry
+------
+Interact with Sentry, such as by publishing new project releases.
+
 system-symbols
 --------------
 Generate missing macOS and windows system symbols from crash reports.
diff --git a/taskcluster/taskgraph/transforms/sentry.py b/taskcluster/taskgraph/transforms/sentry.py
new file mode 100644
index 000000000000..1ee1c6a74597
--- /dev/null
+++ b/taskcluster/taskgraph/transforms/sentry.py
@@ -0,0 +1,22 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+from __future__ import absolute_import, print_function, unicode_literals
+
+from taskgraph.transforms.base import TransformSequence
+
+
+transforms = TransformSequence()
+
+
+@transforms.add
+def sentry(config, tasks):
+    """Do transforms specific to github-sync tasks."""
+    for task in tasks:
+        task["worker"]["env"]["HG_PUSHLOG_URL"] = task["worker"]["env"][
+            "HG_PUSHLOG_URL"
+        ].format(
+            head_repository=config.params["head_repository"],
+            head_rev=config.params["head_rev"],
+        )
+        yield task