diff --git a/presence/json_config.hpp b/presence/json_config.hpp
index 2e7ad72..c41b8d5 100644
--- a/presence/json_config.hpp
+++ b/presence/json_config.hpp
@@ -8,6 +8,7 @@
 #include "config.h"
 #include "rpolicy.hpp"
 #include "fan.hpp"
+#include "psensor.hpp"
 
 namespace phosphor
 {
@@ -18,6 +19,9 @@
 
 using json = nlohmann::json;
 using policies = std::vector<std::unique_ptr<RedundancyPolicy>>;
+// Presence method handler function
+using methodHandler = std::function<
+    std::unique_ptr<PresenceSensor>(size_t, const json&)>;
 
 class JsonConfig
 {
@@ -53,6 +57,12 @@
         /* List of Fan objects to have presence policies */
         std::vector<Fan> _fans;
 
+        /* Presence methods mapping to their associated handler function */
+        static const std::map<std::string, methodHandler> _methods;
+
+        /* List of fan presence sensors */
+        std::vector<std::unique_ptr<PresenceSensor>> _sensors;
+
         /**
          * @brief Process the json config to extract the defined fan presence
          * policies.
@@ -62,6 +72,35 @@
         void process(const json& jsonConf);
 };
 
+/**
+ * Methods of fan presence detection function declarations
+ */
+namespace method
+{
+    /**
+     * @brief Fan presence detection method by tach feedback
+     *
+     * @param[in] fanIndex - fan object index to add tach method
+     * @param[in] method - json properties for a tach method
+     *
+     * @return - A presence sensor to detect fan presence by tach feedback
+     */
+    std::unique_ptr<PresenceSensor> getTach(size_t fanIndex,
+                                            const json& method);
+
+    /**
+     * @brief Fan presence detection method by gpio
+     *
+     * @param[in] fanIndex - fan object index to add gpio method
+     * @param[in] method - json properties for a gpio method
+     *
+     * @return - A presence sensor to detect fan presence by gpio
+     */
+    std::unique_ptr<PresenceSensor> getGpio(size_t fanIndex,
+                                            const json& method);
+
+} // namespace method
+
 } // namespace presence
 } // namespace fan
 } // namespace phosphor