diff --git a/apex/product_packages.mk b/apex/product_packages.mk
index e78d3dc..1a431d5 100644
--- a/apex/product_packages.mk
+++ b/apex/product_packages.mk
@@ -24,5 +24,11 @@
     com.android.virt \
 
 # TODO(b/207336449): Figure out how to get these off /system
-PRODUCT_ARTIFACT_PATH_REQUIREMENT_ALLOWED_LIST += \
-     system/lib64/libgfxstream_backend.so \
+PRODUCT_ARTIFACT_PATH_REQUIREMENT_ALLOWED_LIST := \
+    system/lib64/libgfxstream_backend.so \
+    system/framework/oat/%@service-compos.jar@classes.odex \
+    system/framework/oat/%@service-compos.jar@classes.vdex \
+
+PRODUCT_APEX_SYSTEM_SERVER_JARS := com.android.compos:service-compos
+
+PRODUCT_SYSTEM_EXT_PROPERTIES := ro.config.isolated_compilation_enabled=true
diff --git a/compos/aidl/Android.bp b/compos/aidl/Android.bp
index 4d36d3d..7036511 100644
--- a/compos/aidl/Android.bp
+++ b/compos/aidl/Android.bp
@@ -9,6 +9,11 @@
         "com/android/compos/*.aidl",
     ],
     backend: {
+        java: {
+            apex_available: [
+                "com.android.compos",
+            ],
+        },
         rust: {
             enabled: true,
             apex_available: [
diff --git a/compos/apex/Android.bp b/compos/apex/Android.bp
index c68899a..43e75e4 100644
--- a/compos/apex/Android.bp
+++ b/compos/apex/Android.bp
@@ -51,6 +51,8 @@
         "compsvc",
     ],
 
+    systemserverclasspath_fragments: ["com.android.compos-systemserverclasspath-fragment"],
+
     apps: [
         "CompOSPayloadApp",
     ],
@@ -61,6 +63,12 @@
     ],
 }
 
+systemserverclasspath_fragment {
+    name: "com.android.compos-systemserverclasspath-fragment",
+    contents: ["service-compos"],
+    apex_available: ["com.android.compos"],
+}
+
 prebuilt_etc {
     name: "com.android.compos.init.rc",
     src: "composd.rc",
diff --git a/compos/composd/aidl/Android.bp b/compos/composd/aidl/Android.bp
index 62c1b40..376313b 100644
--- a/compos/composd/aidl/Android.bp
+++ b/compos/composd/aidl/Android.bp
@@ -9,7 +9,7 @@
     unstable: true,
     backend: {
         java: {
-            apex_available: ["//apex_available:platform"],
+            apex_available: ["com.android.compos"],
         },
         rust: {
             enabled: true,
diff --git a/compos/service/Android.bp b/compos/service/Android.bp
new file mode 100644
index 0000000..142460e
--- /dev/null
+++ b/compos/service/Android.bp
@@ -0,0 +1,35 @@
+// Copyright (C) 2021 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+java_library {
+    name: "service-compos",
+    srcs: [
+        "java/**/*.java",
+    ],
+    defaults: ["framework-system-server-module-defaults"],
+    permitted_packages: [
+        "com.android.server.compos",
+        "com.android.compos",
+        "android.system.composd",
+    ],
+    static_libs: [
+        "android.system.composd-java",
+    ],
+    apex_available: [
+        "com.android.compos",
+    ],
+    // Access to SystemService etc
+    sdk_version: "system_server_current",
+    installable: true,
+}
diff --git a/compos/service/java/com/android/server/compos/IsolatedCompilationJobService.java b/compos/service/java/com/android/server/compos/IsolatedCompilationJobService.java
new file mode 100644
index 0000000..7bea1ab
--- /dev/null
+++ b/compos/service/java/com/android/server/compos/IsolatedCompilationJobService.java
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.compos;
+
+import android.app.job.JobParameters;
+import android.app.job.JobService;
+import android.util.Log;
+
+/**
+ * A job scheduler service responsible for performing Isolated Compilation when scheduled.
+ *
+ * @hide
+ */
+public class IsolatedCompilationJobService extends JobService {
+    private static final String TAG = IsolatedCompilationJobService.class.getName();
+
+    @Override
+    public boolean onStartJob(JobParameters params) {
+        Log.i(TAG, "starting job");
+
+        // TODO(b/199147668): Implement
+
+        return false; // Finished
+    }
+
+    @Override
+    public boolean onStopJob(JobParameters params) {
+        return false; // Don't reschedule
+    }
+}
diff --git a/compos/service/java/com/android/server/compos/IsolatedCompilationService.java b/compos/service/java/com/android/server/compos/IsolatedCompilationService.java
new file mode 100644
index 0000000..d2e1f2a
--- /dev/null
+++ b/compos/service/java/com/android/server/compos/IsolatedCompilationService.java
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.compos;
+
+import android.annotation.NonNull;
+import android.content.Context;
+import android.util.Log;
+
+import com.android.server.SystemService;
+
+/**
+ * A system service responsible for performing Isolated Compilation (compiling boot & system server
+ * classpath JARs in a protected VM) when appropriate.
+ *
+ * @hide
+ */
+public class IsolatedCompilationService extends SystemService {
+    private static final String TAG = IsolatedCompilationService.class.getName();
+
+    public IsolatedCompilationService(@NonNull Context context) {
+        super(context);
+    }
+
+    @Override
+    public void onStart() {
+        Log.i(TAG, "Started");
+
+        // TODO(b/199147668): Implement
+    }
+}