diff --git a/ubi/activation_ubi.hpp b/ubi/activation_ubi.hpp
new file mode 100644
index 0000000..a17bb82
--- /dev/null
+++ b/ubi/activation_ubi.hpp
@@ -0,0 +1,61 @@
+#pragma once
+
+#include "activation.hpp"
+
+namespace openpower
+{
+namespace software
+{
+namespace updater
+{
+
+class RedundancyPriorityUbi : public RedundancyPriority
+{
+  public:
+    using RedundancyPriority::RedundancyPriority;
+    virtual ~RedundancyPriorityUbi() = default;
+
+    /** @brief Overloaded Priority property set function
+     *
+     *  @param[in] value - uint8_t
+     *
+     *  @return Success or exception thrown
+     */
+    uint8_t priority(uint8_t value) override;
+};
+
+/** @class ActivationUbi
+ *  @brief OpenBMC activation software management implementation.
+ *  @details A concrete implementation for
+ *  xyz.openbmc_project.Software.Activation DBus API.
+ */
+class ActivationUbi : public Activation
+{
+  public:
+    using Activation::Activation;
+    virtual ~ActivationUbi() = default;
+
+    /** @brief Overloaded Activation property setter function
+     *
+     *  @param[in] value - One of Activation::Activations
+     *
+     *  @return Success or exception thrown
+     */
+    Activations activation(Activations value) override;
+
+    RequestedActivations
+        requestedActivation(RequestedActivations value) override;
+
+  private:
+    /** @brief Tracks whether the read-only & read-write volumes have been
+     *created as part of the activation process. **/
+    bool ubiVolumesCreated = false;
+
+    void unitStateChange(sdbusplus::message::message& msg) override;
+    void startActivation() override;
+    void finishActivation() override;
+};
+
+} // namespace updater
+} // namespace software
+} // namespace openpower