diff --git a/modules/cluster-config-operator.adoc b/modules/cluster-config-operator.adoc
new file mode 100644
index 0000000000..a2635eb7f3
--- /dev/null
+++ b/modules/cluster-config-operator.adoc
@@ -0,0 +1,21 @@
+// Module included in the following assemblies:
+//
+// *  operators/operator-reference.adoc
+
+[id="cluster-config-operator_{context}"]
+= Cluster Config Operator
+
+[discrete]
+== Purpose
+
+The Cluster Config Operator performs the following tasks related to `config.openshift.io`:
+
+* Creates CRDs.
+* Renders the initial custom resources.
+* Handles migrations.
+
+
+[discrete]
+== Project
+
+link:https://github.com/openshift/cluster-config-operator[cluster-config-operator]
diff --git a/modules/cluster-machine-approver-operator.adoc b/modules/cluster-machine-approver-operator.adoc
new file mode 100644
index 0000000000..e1a3953c68
--- /dev/null
+++ b/modules/cluster-machine-approver-operator.adoc
@@ -0,0 +1,21 @@
+// Module included in the following assemblies:
+//
+// *  operators/operator-reference.adoc
+
+[id="cluster-machine-approver-operator_{context}"]
+= Cluster Machine Approver Operator
+
+[discrete]
+== Purpose
+
+The Cluster Machine Approver Operator automatically approves the CSRs requested for a new worker node after cluster installation.
+
+[NOTE]
+====
+For the control plane node, the `approve-csr` service on the bootstrap node automatically approves all CSRs during the cluster bootstrapping phase.
+====
+
+[discrete]
+== Project
+
+link:https://github.com/openshift/cluster-machine-approver[cluster-machine-approver-operator]
diff --git a/operators/operator-reference.adoc b/operators/operator-reference.adoc
index 40c2ad123a..a7950ae1ba 100644
--- a/operators/operator-reference.adoc
+++ b/operators/operator-reference.adoc
@@ -13,9 +13,11 @@ include::modules/cloud-credential-operator.adoc[leveloffset=+1]
 * xref:../rest_api/security_apis/credentialsrequest-cloudcredential-openshift-io-v1.adoc#credentialsrequest-cloudcredential-openshift-io-v1[CredentialsRequest custom resource]
 * xref:../authentication/managing_cloud_provider_credentials/about-cloud-credential-operator.adoc[About the Cloud Credential Operator]
 
+include::modules/cluster-config-operator.adoc[leveloffset=+1]
 include::modules/cluster-authentication-operator.adoc[leveloffset=+1]
 include::modules/cluster-autoscaler-operator.adoc[leveloffset=+1]
 include::modules/cluster-image-registry-operator.adoc[leveloffset=+1]
+include::modules/cluster-machine-approver-operator.adoc[leveloffset=+1]
 include::modules/cluster-monitoring-operator.adoc[leveloffset=+1]
 include::modules/cluster-network-operator.adoc[leveloffset=+1]
 include::modules/cluster-openshift-controller-manager-operators.adoc[leveloffset=+1]