diff --git a/redfish-core/include/event_service_manager.hpp b/redfish-core/include/event_service_manager.hpp
index 61b837c..a5c22f4 100644
--- a/redfish-core/include/event_service_manager.hpp
+++ b/redfish-core/include/event_service_manager.hpp
@@ -10,6 +10,7 @@
 #include "event_matches_filter.hpp"
 #include "event_service_store.hpp"
 #include "filesystem_log_watcher.hpp"
+#include "io_context_singleton.hpp"
 #include "logging.hpp"
 #include "metric_report.hpp"
 #include "ossl_random.hpp"
@@ -18,7 +19,6 @@
 #include "subscription.hpp"
 #include "utils/time_utils.hpp"
 
-#include <boost/asio/io_context.hpp>
 #include <boost/circular_buffer.hpp>
 #include <boost/circular_buffer/base.hpp>
 #include <boost/container/flat_map.hpp>
@@ -77,8 +77,6 @@
     constexpr static size_t maxMessages = 200;
     boost::circular_buffer<Event> messages{maxMessages};
 
-    boost::asio::io_context& ioc;
-
   public:
     EventServiceManager(const EventServiceManager&) = delete;
     EventServiceManager& operator=(const EventServiceManager&) = delete;
@@ -86,16 +84,15 @@
     EventServiceManager& operator=(EventServiceManager&&) = delete;
     ~EventServiceManager() = default;
 
-    explicit EventServiceManager(boost::asio::io_context& iocIn) : ioc(iocIn)
+    explicit EventServiceManager()
     {
         // Load config from persist store.
         initConfig();
     }
 
-    static EventServiceManager&
-        getInstance(boost::asio::io_context* ioc = nullptr)
+    static EventServiceManager& getInstance()
     {
-        static EventServiceManager handler(*ioc);
+        static EventServiceManager handler;
         return handler;
     }
 
@@ -127,7 +124,7 @@
                 continue;
             }
             std::shared_ptr<Subscription> subValue =
-                std::make_shared<Subscription>(newSub, *url, ioc);
+                std::make_shared<Subscription>(newSub, *url, getIoContext());
             std::string id = subValue->userSub->id;
             subValue->deleter = [id]() {
                 EventServiceManager::getInstance().deleteSubscription(id);
@@ -283,7 +280,7 @@
                 {
                     if (!filesystemLogMonitor)
                     {
-                        filesystemLogMonitor.emplace(ioc);
+                        filesystemLogMonitor.emplace(getIoContext());
                     }
                 }
             }
@@ -380,7 +377,7 @@
             {
                 if (!filesystemLogMonitor)
                 {
-                    filesystemLogMonitor.emplace(ioc);
+                    filesystemLogMonitor.emplace(getIoContext());
                 }
             }
         }
diff --git a/redfish-core/include/redfish_aggregator.hpp b/redfish-core/include/redfish_aggregator.hpp
index 853f958..9535122 100644
--- a/redfish-core/include/redfish_aggregator.hpp
+++ b/redfish-core/include/redfish_aggregator.hpp
@@ -9,12 +9,12 @@
 #include "http_client.hpp"
 #include "http_request.hpp"
 #include "http_response.hpp"
+#include "io_context_singleton.hpp"
 #include "logging.hpp"
 #include "parsing.hpp"
 #include "ssl_key_handler.hpp"
 #include "utility.hpp"
 
-#include <boost/asio/io_context.hpp>
 #include <boost/beast/http/field.hpp>
 #include <boost/beast/http/status.hpp>
 #include <boost/beast/http/verb.hpp>
@@ -857,8 +857,8 @@
     }
 
   public:
-    explicit RedfishAggregator(boost::asio::io_context& ioc) :
-        client(ioc,
+    explicit RedfishAggregator() :
+        client(getIoContext(),
                std::make_shared<crow::ConnectionPolicy>(getAggregationPolicy()))
     {
         getSatelliteConfigs(constructorCallback);
@@ -869,9 +869,9 @@
     RedfishAggregator& operator=(RedfishAggregator&&) = delete;
     ~RedfishAggregator() = default;
 
-    static RedfishAggregator& getInstance(boost::asio::io_context* io = nullptr)
+    static RedfishAggregator& getInstance()
     {
-        static RedfishAggregator handler(*io);
+        static RedfishAggregator handler;
         return handler;
     }
 
diff --git a/redfish-core/lib/event_service.hpp b/redfish-core/lib/event_service.hpp
index 42eb638..fcde1a8 100644
--- a/redfish-core/lib/event_service.hpp
+++ b/redfish-core/lib/event_service.hpp
@@ -12,6 +12,7 @@
 #include "generated/enums/event_destination.hpp"
 #include "http/utility.hpp"
 #include "http_request.hpp"
+#include "io_context_singleton.hpp"
 #include "logging.hpp"
 #include "query.hpp"
 #include "registries.hpp"
@@ -491,7 +492,7 @@
             std::shared_ptr<Subscription> subValue =
                 std::make_shared<Subscription>(
                     std::make_shared<persistent_data::UserSubscription>(), *url,
-                    app.ioContext());
+                    getIoContext());
 
             if (subscriptionType)
             {
diff --git a/redfish-core/lib/eventservice_sse.hpp b/redfish-core/lib/eventservice_sse.hpp
index 86bf1d1..eb0552f 100644
--- a/redfish-core/lib/eventservice_sse.hpp
+++ b/redfish-core/lib/eventservice_sse.hpp
@@ -25,8 +25,7 @@
 inline void createSubscription(crow::sse_socket::Connection& conn,
                                const crow::Request& req)
 {
-    EventServiceManager& manager =
-        EventServiceManager::getInstance(&conn.getIoContext());
+    EventServiceManager& manager = EventServiceManager::getInstance();
     if ((manager.getNumberOfSubscriptions() >= maxNoOfSubscriptions) ||
         manager.getNumberOfSSESubscriptions() >= maxNoOfSSESubscriptions)
     {
@@ -79,8 +78,7 @@
 
 inline void deleteSubscription(crow::sse_socket::Connection& conn)
 {
-    redfish::EventServiceManager::getInstance(&conn.getIoContext())
-        .deleteSseSubscription(conn);
+    EventServiceManager::getInstance().deleteSseSubscription(conn);
 }
 
 inline void requestRoutesEventServiceSse(App& app)