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diff --git a/shell/openstack-cleanup-orphaned-k8s-clusters.sh b/shell/openstack-cleanup-orphaned-k8s-clusters.sh
new file mode 100644
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+++ b/shell/openstack-cleanup-orphaned-k8s-clusters.sh
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+#!/bin/bash -l
+# SPDX-License-Identifier: EPL-1.0
+##############################################################################
+# Copyright (c) 2017, 2022 The Linux Foundation and others.
+#
+# All rights reserved. This program and the accompanying materials
+# are made available under the terms of the Eclipse Public License v1.0
+# which accompanies this distribution, and is available at
+# http://www.eclipse.org/legal/epl-v10.html
+##############################################################################
+# Scans OpenStack for orphaned COE clusters
+echo "---> Orphaned k8s clusters"
+
+os_cloud="${OS_CLOUD:-vex}"
+jenkins_urls="${JENKINS_URLS:-}"
+
+cluster_in_jenkins() {
+    # Usage: cluster_in_jenkins CLUSTER_NAME JENKINS_URL [JENKINS_URL...]
+    # Returns: 0 If CLUSTER_NAME is in Jenkins and 1 if CLUSTER_NAME is not
+    # in Jenkins.
+
+    CLUSTER_NAME="${1}"
+
+    builds=()
+    for jenkins in "${@:2}"; do
+        PARAMS="tree=computer[executors[currentExecutable[url]],"
+        PARAMS=$PARAMS"oneOffExecutors[currentExecutable[url]]]"
+        PARAMS=$PARAMS"&xpath=//url&wrapper=builds"
+        JENKINS_URL="$jenkins/computer/api/json?$PARAMS"
+        resp=$(curl -s -w "\\n\\n%{http_code}" --globoff -H "Content-Type:application/json" "$JENKINS_URL")
+        json_data=$(echo "$resp" | head -n1)
+        status=$(echo "$resp" | awk 'END {print $NF}')
+
+        if [ "$status" != 200 ]; then
+            >&2 echo "ERROR: Failed to fetch data from $JENKINS_URL with status code $status"
+            >&2 echo "$resp"
+            exit 1
+        fi
+
+        if [[ "${jenkins}" == *"jenkins."*".org" ]] || [[ "${jenkins}" == *"jenkins."*".io" ]]; then
+            silo="production"
+        else
+            silo=$(echo "$jenkins" | sed 's/\/*$//' | awk -F'/' '{print $NF}')
+        fi
+        export silo
+        # We purposely want to wordsplit here to combine the arrays
+        # shellcheck disable=SC2206,SC2207
+        builds=(${builds[@]} $(echo "$json_data" | \
+            jq -r '.computer[].executors[].currentExecutable.url' \
+            | grep -v null | awk -F'/' '{print ENVIRON["silo"] "-" $6 "-" $7}')
+        )
+    done
+
+    if [[ "${builds[*]}" =~ $CLUSTER_NAME ]]; then
+        return 0
+    fi
+
+    return 1
+}
+
+#########################
+## FETCH ACTIVE BUILDS ##
+#########################
+# Fetch coe cluster list before fetching active stacks.
+mapfile -t OS_COE_CLUSTERS < <(openstack --os-cloud "$os_cloud" coe cluster list \
+            -f value -c "uuid" -c "name" -c "status" -c "health_status" \
+            | awk '{print $2}')
+
+##########################
+## DELETE UNUSED STACKS ##
+##########################
+echo "-----> Delete orphaned cluster"
+
+# Search for COE clusters not in use by any active Jenkins systems and remove them.
+for CLUSTER_NAME in "${OS_COE_CLUSTERS[@]}"; do
+    # jenkins_urls intentially needs globbing to be passed a separate params.
+    # shellcheck disable=SC2153,SC2086
+    if cluster_in_jenkins "$CLUSTER_NAME" $jenkins_urls; then
+        # No need to delete stacks if there exists an active build for them
+        continue
+    else
+        echo "Deleting orphaned k8s cluster: $CLUSTER_NAME"
+        openstack --os-cloud "$os_cloud" coe cluster delete "$CLUSTER_NAME"
+    fi
+done