diff --git a/rtu/device_manager.hpp b/rtu/device_manager.hpp
new file mode 100644
index 0000000..68daa64
--- /dev/null
+++ b/rtu/device_manager.hpp
@@ -0,0 +1,46 @@
+#pragma once
+
+#include "common/entity_manager_interface.hpp"
+#include "inventory/modbus_inventory.hpp"
+#include "port/base_port.hpp"
+
+#include <sdbusplus/async.hpp>
+
+namespace phosphor::modbus::rtu
+{
+
+namespace InventoryIntf = phosphor::modbus::rtu::inventory;
+namespace PortIntf = phosphor::modbus::rtu::port;
+
+class DeviceManager
+{
+  public:
+    DeviceManager() = delete;
+    DeviceManager(const DeviceManager&) = delete;
+    DeviceManager& operator=(const DeviceManager&) = delete;
+    DeviceManager(DeviceManager&&) = delete;
+    DeviceManager& operator=(DeviceManager&&) = delete;
+
+    explicit DeviceManager(sdbusplus::async::context& ctx);
+
+  private:
+    using inventory_device_map_t =
+        std::unordered_map<std::string, std::unique_ptr<InventoryIntf::Device>>;
+    using port_map_t =
+        std::unordered_map<std::string, std::unique_ptr<PortIntf::BasePort>>;
+
+    auto processConfigAdded(const sdbusplus::message::object_path& objectPath,
+                            const std::string& interfaceName)
+        -> sdbusplus::async::task<>;
+
+    auto processConfigRemoved(const sdbusplus::message::object_path& objectPath,
+                              const std::string& interfaceName)
+        -> sdbusplus::async::task<>;
+
+    sdbusplus::async::context& ctx;
+    entity_manager::EntityManagerInterface entityManager;
+    inventory_device_map_t inventoryDevices;
+    port_map_t ports;
+};
+
+} // namespace phosphor::modbus::rtu