diff --git a/xyz/openbmc_project/Control/ThermalMode.interface.yaml b/xyz/openbmc_project/Control/ThermalMode.interface.yaml
new file mode 100644
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+++ b/xyz/openbmc_project/Control/ThermalMode.interface.yaml
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+description: >
+    Implement to provide alternative thermal control modes of a system
+    that can be enabled, overriding the system defaults.
+
+    Control.ThermalMode.Supported is read only.
+        Implementation of this interface populates the list of supported modes.
+    Control.ThermalMode.Current is read/write.
+        Implementation specific mode for the thermal control application
+        to run in.
+
+properties:
+    - name: Supported
+      type: array[string]
+      flags:
+          - const
+      description: >
+          An implemention specific list of supported modes that the thermal
+          control application can be configured to provide for a platform.
+    - name: Current
+      type: string
+      default: "Default"
+      description: >
+          The current mode the thermal control application should execute in
+          selected from the supported modes provided.
+
+# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4