diff --git a/src/DIRAC/WorkloadManagementSystem/Agent/SiteDirector.py b/src/DIRAC/WorkloadManagementSystem/Agent/SiteDirector.py
index d77e109b807..b67c2c7eb59 100644
--- a/src/DIRAC/WorkloadManagementSystem/Agent/SiteDirector.py
+++ b/src/DIRAC/WorkloadManagementSystem/Agent/SiteDirector.py
@@ -84,6 +84,9 @@ def __init__(self, *args, **kwargs):
 
         self.workingDirectory = None
         self.maxQueueLength = 86400 * 3
+        # Bundle proxy lifetime factor: Job bundled proxy lifetime will be this multiplied by the queue runtime length,
+        # should be high enough to accommodate the queuing time of the job.
+        self.bundleProxyLifetimeFactor = 1.5
 
     def initialize(self):
         """Initial settings"""
@@ -446,7 +449,16 @@ def _submitPilotsToQueue(self, pilotsToSubmit: int, ce: ComputingElement, queue:
         envVariables = self.queueDict[queue]["ParametersDict"].get("EnvironmentVariables", None)
 
         # Generate the executable
-        executable = self._getExecutable(queue, proxy=ce.proxy, jobExecDir=jobExecDir, envVariables=envVariables)
+        # We don't want to use the submission/"pilot" proxy for the job in the bundle:
+        # Instead we use a non-VOMS proxy which is then not limited in lifetime by the VOMS extension
+        proxyTimeSec = int(self.maxQueueLength * self.bundleProxyLifetimeFactor)
+        pilotGroup = Operations(vo=self.vo).getValue("Pilot/GenericPilotGroup")
+        result = gProxyManager.downloadProxy(self.pilotDN, pilotGroup, limited=True, requiredTimeLeft=proxyTimeSec)
+        if not result["OK"]:
+            self.log.error("Failed to get job proxy", f"Queue {queue}:\n{result['Message']}")
+            return result
+        jobProxy = result["Value"]
+        executable = self._getExecutable(queue, proxy=jobProxy, jobExecDir=jobExecDir, envVariables=envVariables)
 
         # Submit the job
         submitResult = ce.submitJob(executable, "", pilotsToSubmit)
diff --git a/src/DIRAC/WorkloadManagementSystem/Agent/test/Test_Agent_SiteDirector.py b/src/DIRAC/WorkloadManagementSystem/Agent/test/Test_Agent_SiteDirector.py
index 8dde1108327..a961206bcfa 100644
--- a/src/DIRAC/WorkloadManagementSystem/Agent/test/Test_Agent_SiteDirector.py
+++ b/src/DIRAC/WorkloadManagementSystem/Agent/test/Test_Agent_SiteDirector.py
@@ -144,6 +144,11 @@
 }
 """
 
+mockPMProxy = MagicMock()
+mockPMProxy.dumpAllToString.return_value = {"OK": True, "Value": "fakeProxy"}
+mockPMProxyReply = MagicMock()
+mockPMProxyReply.return_value = {"OK": True, "Value": mockPMProxy}
+
 
 @pytest.fixture
 def config():
@@ -170,6 +175,9 @@ def sd(mocker, config):
     mocker.patch(
         "DIRAC.WorkloadManagementSystem.Agent.SiteDirector.ResourceStatus.getElementStatus", return_values=usableSites
     )
+    mocker.patch(
+        "DIRAC.WorkloadManagementSystem.Agent.SiteDirector.gProxyManager.downloadProxy", side_effect=mockPMProxyReply
+    )
     sd = SiteDirector()
 
     # Set logger