diff --git a/phosphor-power-supply/chassis_manager.hpp b/phosphor-power-supply/chassis_manager.hpp
new file mode 100644
index 0000000..100514d
--- /dev/null
+++ b/phosphor-power-supply/chassis_manager.hpp
@@ -0,0 +1,127 @@
+#pragma once
+
+#include "chassis.hpp"
+#include "types.hpp"
+#include "utility.hpp"
+
+#include <sdbusplus/bus/match.hpp>
+#include <sdbusplus/server/manager.hpp>
+#include <sdbusplus/server/object.hpp>
+#include <sdeventplus/event.hpp>
+#include <sdeventplus/utility/timer.hpp>
+#include <xyz/openbmc_project/State/Decorator/PowerSystemInputs/server.hpp>
+
+using namespace phosphor::power::psu;
+
+namespace phosphor::power::chassis_manager
+{
+
+// Validation timeout. Allow 30s to detect if new EM interfaces show up in D-Bus
+// before performing the validation.
+constexpr auto validationTimeout = std::chrono::seconds(30);
+
+/**
+ * @class ChassisManager
+ *
+ * @brief Manages and monitors power supply devices for the chassis.
+ *
+ * @detail This class interacts with D-Bus to detect chassis power supply,
+ * subscribe to Entity Manager interface changes.
+ */
+class ChassisManager
+{
+  public:
+    ChassisManager() = delete;
+    ~ChassisManager() = default;
+    ChassisManager(const ChassisManager&) = delete;
+    ChassisManager& operator=(const ChassisManager&) = delete;
+    ChassisManager(ChassisManager&&) = delete;
+    ChassisManager& operator=(ChassisManager&&) = delete;
+
+    /**
+     * @brief Constructs a ChassisManager instance.
+     *
+     * @details Sets up D-Bus interfaces, creates timer for power supply
+     * validation and monitoring, and subscribes to entity-manager interfaces.
+     *
+     * @param[in] bus - Reference to the system D-Bus object.
+     * @param[in] e - Reference to event loop.
+     */
+    ChassisManager(sdbusplus::bus_t& bus, const sdeventplus::Event& e);
+
+    /**
+     * @brief Starts the main event loop for monitoring.
+     *
+     * @return int Returns the result the result of the event loop execution.
+     */
+    int run()
+    {
+        return timer->get_event().loop();
+    }
+
+  private:
+    /**
+     * @brief The D-Bus object
+     */
+    sdbusplus::bus_t& bus;
+
+    /**
+     * @brief The timer that runs to periodically check the power supplies.
+     */
+    std::unique_ptr<
+        sdeventplus::utility::Timer<sdeventplus::ClockId::Monotonic>>
+        timer;
+
+    /**
+     * @brief Used to subscribe to Entity Manager interfaces added
+     */
+    std::unique_ptr<sdbusplus::bus::match_t> entityManagerIfacesAddedMatch;
+
+    /**
+     * @brief List of chassis objects populated dynamically.
+     */
+    std::vector<std::unique_ptr<phosphor::power::chassis::Chassis>>
+        listOfChassis;
+
+    /**
+     * @brief Declares a constant reference to an sdeventplus::Envent to manage
+     * async processing.
+     */
+    const sdeventplus::Event& eventLoop;
+
+    /**
+     * @brief Callback for entity-manager interface added
+     *
+     * @details Process the information from the supported configuration and
+     * or IBM CFFPS Connector interface being added.
+     *
+     * @param[in] msg - D-Bus message containing the interface details.
+     */
+    void entityManagerIfaceAdded(sdbusplus::message_t& msg);
+
+    /**
+     * @brief Invoke the PSU analysis method in each chassis on the system.
+     *
+     * @details Scan the system for chassis and analyze each chassis power
+     * supplies and log any detected errors.
+     */
+    void analyze();
+
+    /**
+     * @brief Initialize the list of chassis object from the inventory, scans
+     * the D-Bus subtree for chassis and creates Chassis instances.
+     */
+    void initializeChassisList();
+
+    /**
+     * @brief Retrieves a pointer to a Chassis object matching the given ID.
+     *
+     * @param[in] chassisId - Unique identifier of the chassis to search for.
+     * @return Raw pointer to the matching Chassis object if found, otherwise a
+     * nullptr.
+     */
+    phosphor::power::chassis::Chassis* getMatchingChassisPtr(
+        uint64_t chassisId);
+};
+
+} // namespace phosphor::power::chassis_manager