diff --git a/src/simulator_worker/omotes_logging.py b/src/simulator_worker/omotes_logging.py
new file mode 100644
index 0000000..c2bcf4f
--- /dev/null
+++ b/src/simulator_worker/omotes_logging.py
@@ -0,0 +1,46 @@
+import logging
+
+from omotes_sdk.internal.orchestrator_worker_events.esdl_messages import (
+    EsdlMessage,
+    MessageSeverity,
+)
+
+logger = logging.getLogger(__name__)
+
+SEVERITY_MAP = {
+    logging.CRITICAL: MessageSeverity.ERROR,
+    logging.ERROR: MessageSeverity.ERROR,
+    logging.WARNING: MessageSeverity.WARNING,
+    logging.INFO: MessageSeverity.INFO,
+    logging.DEBUG: MessageSeverity.DEBUG,
+}
+
+
+class OmotesEsdlMessageHandler(logging.Handler):
+    """Custom logging handler for simulator messages."""
+
+    esdl_msgs: list[EsdlMessage] = []  # ClassVariable for shared storage (.append is threadsafe).
+
+    def emit(self, record: logging.LogRecord) -> None:
+        """Emit a log record."""
+        esdl_object_id = record.__dict__.get("esdl_object_id", None)
+        self.esdl_msgs.append(
+            EsdlMessage(
+                esdl_object_id=esdl_object_id,
+                severity=SEVERITY_MAP.get(record.levelno, MessageSeverity.INFO),
+                technical_message=record.getMessage(),
+            )
+        )
+
+
+def setup_logging(debug: bool = True) -> OmotesEsdlMessageHandler:
+    """Setup logging for the simulator."""
+    level = logging.DEBUG if debug else logging.INFO
+    root = logging.getLogger()
+
+    formatter = logging.Formatter("%(asctime)s [%(levelname)s]:%(name)s - %(message)s")
+    esdl_handler = OmotesEsdlMessageHandler()
+    esdl_handler.setLevel(level)
+    esdl_handler.setFormatter(formatter)
+    root.addHandler(esdl_handler)
+    return esdl_handler
diff --git a/src/simulator_worker/simulator_worker.py b/src/simulator_worker/simulator_worker.py
index 0a5a350..c1ec446 100644
--- a/src/simulator_worker/simulator_worker.py
+++ b/src/simulator_worker/simulator_worker.py
@@ -36,6 +36,7 @@
 from omotes_simulator_core.infrastructure.simulation_manager import SimulationManager
 from omotes_simulator_core.infrastructure.utils import pyesdl_from_string
 
+from simulator_worker.omotes_logging import OmotesEsdlMessageHandler, setup_logging
 from simulator_worker.utils import add_datetime_index, create_output_esdl
 
 dotenv.load_dotenv()
@@ -112,12 +113,13 @@ def simulator_worker_task(
     # Write output_esdl to file for debugging
     # with open(f"result_{simulation_id}.esdl", "w") as file:
     #     file.writelines(output_esdl)
-    return output_esdl, []
+    return output_esdl, OmotesEsdlMessageHandler.esdl_msgs
 
 
 def start_app() -> None:
     """Design Toolkit Application application."""
     try:
+        setup_logging()
         initialize_worker("simulator", simulator_worker_task)
     except Exception as error:
         logger.error("Error occured: %s at: %s", error, traceback.format_exc(limit=-1))