diff --git a/eng/pipelines/templates/variables/image.yml b/eng/pipelines/templates/variables/image.yml
new file mode 100644
index 000000000000..644c8e916d87
--- /dev/null
+++ b/eng/pipelines/templates/variables/image.yml
@@ -0,0 +1,29 @@
+# Default pool image selection. Set as variable so we can override at pipeline level
+
+variables:
+  - name: LINUXPOOL
+    value: azsdk-pool-mms-ubuntu-2004-general
+  - name: LINUXNEXTPOOL
+    value: azsdk-pool-mms-ubuntu-2204-general
+  - name: WINDOWSPOOL
+    value: azsdk-pool-mms-win-2022-general
+  - name: MACPOOL
+    value: Azure Pipelines
+
+  - name: LINUXVMIMAGE
+    value: azsdk-pool-mms-ubuntu-2004-1espt
+  - name: LINUXNEXTVMIMAGE
+    value: azsdk-pool-mms-ubuntu-2204-1espt
+  - name: WINDOWSVMIMAGE
+    value: azsdk-pool-mms-win-2022-1espt
+  - name: MACVMIMAGE
+    value: macos-latest
+
+  # Values required for pool.os field in 1es pipeline templates
+  - name: LINUXOS
+    value: linux
+  - name: WINDOWSOS
+    value: windows
+  - name: MACOS
+    value: macOS
+