diff --git a/aiida/engine/runners.py b/aiida/engine/runners.py
index 90e933dc56..2df3b12770 100644
--- a/aiida/engine/runners.py
+++ b/aiida/engine/runners.py
@@ -238,10 +238,17 @@ def kill_process(_num, _frame):
                 LOGGER.critical('runner received interrupt, killing process %s', process_inited.pid)
                 process_inited.kill(msg='Process was killed because the runner received an interrupt')
 
-            signal.signal(signal.SIGINT, kill_process)
-            signal.signal(signal.SIGTERM, kill_process)
+            original_handler_int = signal.getsignal(signal.SIGINT)
+            original_handler_term = signal.getsignal(signal.SIGTERM)
+
+            try:
+                signal.signal(signal.SIGINT, kill_process)
+                signal.signal(signal.SIGTERM, kill_process)
+                process_inited.execute()
+            finally:
+                signal.signal(signal.SIGINT, original_handler_int)
+                signal.signal(signal.SIGTERM, original_handler_term)
 
-            process_inited.execute()
             return process_inited.outputs, process_inited.node
 
     def run(self, process: TYPE_RUN_PROCESS, *args: Any, **inputs: Any) -> Dict[str, Any]: