diff --git a/phosphor-regulators/src/manager.cpp b/phosphor-regulators/src/manager.cpp
index 8b8134c..2c44916 100644
--- a/phosphor-regulators/src/manager.cpp
+++ b/phosphor-regulators/src/manager.cpp
@@ -21,6 +21,7 @@
 #include <sdbusplus/bus.hpp>
 
 #include <chrono>
+#include <variant>
 
 namespace phosphor
 {
@@ -32,12 +33,18 @@
 Manager::Manager(sdbusplus::bus::bus& bus, const sdeventplus::Event& event) :
     ManagerObject(bus, objPath, true), bus(bus), eventLoop(event), fileName("")
 {
+    // Subscribe to interfacesAdded signal for filename property
+    std::unique_ptr<sdbusplus::server::match::match> matchPtr =
+        std::make_unique<sdbusplus::server::match::match>(
+            bus,
+            sdbusplus::bus::match::rules::interfacesAdded(sysDbusObj).c_str(),
+            std::bind(std::mem_fn(&Manager::signalHandler), this,
+                      std::placeholders::_1));
+    signals.emplace_back(std::move(matchPtr));
+
     // Attempt to get the filename property from dbus
     setFileName(getFileNameDbus());
 
-    // TODO Subscribe to interfacesAdded signal for filename property
-    // Callback should set fileName and call parse json function
-
     if (!fileName.empty())
     {
         // TODO Load & parse JSON configuration data file
@@ -82,6 +89,42 @@
     // TODO Reload and process the configuration data
 }
 
+void Manager::signalHandler(sdbusplus::message::message& msg)
+{
+    if (msg)
+    {
+        sdbusplus::message::object_path op;
+        msg.read(op);
+        if (static_cast<const std::string&>(op) != sysDbusPath)
+        {
+            // Object path does not match the path
+            return;
+        }
+
+        // An interfacesAdded signal returns a dictionary of interface
+        // names to a dictionary of properties and their values
+        // https://dbus.freedesktop.org/doc/dbus-specification.html
+        std::map<std::string, std::map<std::string, std::variant<std::string>>>
+            intfProp;
+        msg.read(intfProp);
+        auto itIntf = intfProp.find(sysDbusIntf);
+        if (itIntf == intfProp.cend())
+        {
+            // Interface not found on the path
+            return;
+        }
+        auto itProp = itIntf->second.find(sysDbusProp);
+        if (itProp == itIntf->second.cend())
+        {
+            // Property not found on the interface
+            return;
+        }
+        // Set fileName and call parse json function
+        setFileName(std::get<std::string>(itProp->second));
+        // TODO Load & parse JSON configuration data file
+    }
+}
+
 const std::string Manager::getFileNameDbus()
 {
     std::string fileName = "";
diff --git a/phosphor-regulators/src/manager.hpp b/phosphor-regulators/src/manager.hpp
index eb0cef8..c2d78f1 100644
--- a/phosphor-regulators/src/manager.hpp
+++ b/phosphor-regulators/src/manager.hpp
@@ -2,6 +2,7 @@
 
 #include <interfaces/manager_interface.hpp>
 #include <sdbusplus/bus.hpp>
+#include <sdbusplus/bus/match.hpp>
 #include <sdbusplus/server/object.hpp>
 #include <sdeventplus/event.hpp>
 #include <sdeventplus/source/signal.hpp>
@@ -70,6 +71,13 @@
     void sighupHandler(sdeventplus::source::Signal& sigSrc,
                        const struct signalfd_siginfo* sigInfo);
 
+    /**
+     * @brief Callback function to handle interfacesAdded dbus signals
+     *
+     * @param[in] msg - Expanded sdbusplus message data
+     */
+    void signalHandler(sdbusplus::message::message& msg);
+
   private:
     /**
      * The dbus bus
@@ -87,6 +95,11 @@
     std::vector<Timer> timers;
 
     /**
+     * List of dbus signal matches
+     */
+    std::vector<std::unique_ptr<sdbusplus::bus::match::match>> signals;
+
+    /**
      * JSON configuration data filename
      */
     std::string fileName;