diff --git a/python/libcuopt/libcuopt/_cli_wrapper.py b/python/libcuopt/libcuopt/_cli_wrapper.py
index 5f5d134ba6..78e95280b7 100644
--- a/python/libcuopt/libcuopt/_cli_wrapper.py
+++ b/python/libcuopt/libcuopt/_cli_wrapper.py
@@ -1,14 +1,17 @@
-# SPDX-FileCopyrightText: Copyright (c) 2025, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# SPDX-FileCopyrightText: Copyright (c) 2025-2026, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 # SPDX-License-Identifier: Apache-2.0
 
 import os
-import subprocess
 import sys
 
 
 def main():
     """
     This connects to cli binary which situated under libcuopt/bin folder
+
+    execv replaces this process rather than spawning a child, so signals sent
+    to the console script's pid reach the solver directly instead of stopping
+    at a Python parent that forwards nothing.
     """
     cli_path = os.path.join(os.path.dirname(__file__), "bin", "cuopt_cli")
-    sys.exit(subprocess.call([cli_path] + sys.argv[1:]))
+    os.execv(cli_path, [cli_path] + sys.argv[1:])
diff --git a/python/libcuopt/libcuopt/_grpc_server_wrapper.py b/python/libcuopt/libcuopt/_grpc_server_wrapper.py
index dc60b2bbda..763bf33a36 100644
--- a/python/libcuopt/libcuopt/_grpc_server_wrapper.py
+++ b/python/libcuopt/libcuopt/_grpc_server_wrapper.py
@@ -2,15 +2,20 @@
 # SPDX-License-Identifier: Apache-2.0
 
 import os
-import subprocess
 import sys
 
 
 def main():
     """
     This connects to the gRPC server binary situated under libcuopt/bin folder.
+
+    execv replaces this process rather than spawning a child. Spawning leaves
+    a Python parent that waits on the server but forwards nothing to it, so a
+    signal sent to the console script's pid kills only the wrapper: the server
+    and its GPU workers survive, orphaned and still holding the listen port,
+    and the shutdown path that cancels jobs and reaps workers never runs.
     """
     server_path = os.path.join(
         os.path.dirname(__file__), "bin", "cuopt_grpc_server"
     )
-    sys.exit(subprocess.call([server_path] + sys.argv[1:]))
+    os.execv(server_path, [server_path] + sys.argv[1:])