diff --git a/DDG4/python/DDSim/DD4hepSimulation.py b/DDG4/python/DDSim/DD4hepSimulation.py
index bf7057549d2a8bc3617f49c5eadd5a6f64d112e2..8c25b442aa698a1f5283d0abee1bfe6979d3816b 100644
--- a/DDG4/python/DDSim/DD4hepSimulation.py
+++ b/DDG4/python/DDSim/DD4hepSimulation.py
@@ -28,6 +28,7 @@ from DDSim.Helper.ConfigHelper import ConfigHelper
 from DDSim.Helper.MagneticField import MagneticField
 from DDSim.Helper.ParticleHandler import ParticleHandler
 from DDSim.Helper.Gun import Gun
+from DDSim.Helper.UI import UI
 import argparse
 import ddsix as six
 import logging
@@ -99,6 +100,7 @@ class DD4hepSimulation(object):
     self.geometry = Geometry()
     self.filter = Filter()
     self.physics = Physics()
+    self.ui = UI()
 
     self._argv = None
 
@@ -331,12 +333,11 @@ class DD4hepSimulation(object):
       exit(1)
 
     # User Configuration for the Geant4Phases
-    uiaction.ConfigureCommands = self.physics._commandsConfigure
-    uiaction.TerminateCommands = self.physics._commandsTerminate
-    uiaction.PostRunCommands = self.physics._commandsPostRun
-    uiaction.PreRunCommands = self.physics._commandsPreRun
-    uiaction.InitializeCommands = self.physics._commandsInitialize
-
+    uiaction.ConfigureCommands = self.ui._commandsConfigure
+    uiaction.InitializeCommands = self.ui._commandsInitialize
+    uiaction.PostRunCommands = self.ui._commandsPostRun
+    uiaction.PreRunCommands = self.ui._commandsPreRun
+    uiaction.TerminateCommands = self.ui._commandsTerminate
 
     kernel.NumEvents = self.numberOfEvents
 
diff --git a/DDG4/python/DDSim/Helper/Physics.py b/DDG4/python/DDSim/Helper/Physics.py
index 73ced27f93ea7588b5a7e81679de3bceb9618ae5..db1e82e335f65b7df7292795e1f678489e078fb7 100644
--- a/DDG4/python/DDSim/Helper/Physics.py
+++ b/DDG4/python/DDSim/Helper/Physics.py
@@ -30,12 +30,6 @@ class Physics(ConfigHelper):
     self._zeroTimePDGs = {11, 13, 15, 17}
     self._userFunctions = []
 
-    self._commandsConfigure = []
-    self._commandsTerminate = []
-    self._commandsPostRun = []
-    self._commandsPreRun = []
-    self._commandsInitialize = []
-
   @property
   def rejectPDGs(self):
     """Set of PDG IDs that will not be passed from the input record to Geant4.
@@ -122,46 +116,6 @@ class Physics(ConfigHelper):
   def list(self, val):  # noqa: A003
     self._list = val
 
-  @property
-  def commandsConfigure(self):
-    """List of UI commands to run during the 'Configure' phase."""
-    return self._commandsConfigure
-  @commandsConfigure.setter
-  def commandsConfigure(self, val):
-    self._commandsConfigure = self.makeList(val)
-
-  @property
-  def commandsInitialize(self):
-    """List of UI commands to run during the 'Initialize' phase."""
-    return self._commandsInitialize
-  @commandsInitialize.setter
-  def commandsInitialize(self, val):
-    self._commandsInitialize = self.makeList(val)
-
-  @property
-  def commandsTerminate(self):
-    """List of UI commands to run during the 'Terminate' phase."""
-    return self._commandsTerminate
-  @commandsTerminate.setter
-  def commandsTerminate(self, val):
-    self._commandsTerminate = self.makeList(val)
-
-  @property
-  def commandsPreRun(self):
-    """List of UI commands to run during the 'PreRun' phase."""
-    return self._commandsPreRun
-  @commandsPreRun.setter
-  def commandsPreRun(self, val):
-    self._commandsPreRun = self.makeList(val)
-
-  @property
-  def commandsPostRun(self):
-    """List of UI commands to run during the 'PostRun' phase."""
-    return self._commandsPostRun
-  @commandsPostRun.setter
-  def commandsPostRun(self, val):
-    self._commandsPostRun = self.makeList(val)
-
   def setupPhysics(self, kernel, name=None):
     seq = kernel.physicsList()
     seq.extends = name if name is not None else self.list
diff --git a/DDG4/python/DDSim/Helper/UI.py b/DDG4/python/DDSim/Helper/UI.py
new file mode 100644
index 0000000000000000000000000000000000000000..053cb84f320563495488152b910b195f96b71475
--- /dev/null
+++ b/DDG4/python/DDSim/Helper/UI.py
@@ -0,0 +1,76 @@
+"""Helper object for configuration of Geant4 commands to run during different phases."""
+
+from DDSim.Helper.ConfigHelper import ConfigHelper
+
+
+class UI(ConfigHelper):
+  """Configuration for setting commands to run during different phases.
+
+  In this section, one can configure commands that should be run during the different phases of the Geant4 execution.
+
+  1. Configuration
+  2. Initialization
+  3. Pre Run
+  4. Post Run
+  5. Terminate / Finalization
+
+  For example, one can add
+
+  >>> SIM.ui.commandsConfigure = ['/physics_lists/em/SyncRadiation true']
+
+  Further details should be taken from the Geant4 documentation.
+  """
+
+  def __init__(self):
+    super(UI, self).__init__()
+
+    self._commandsConfigure = []
+    self._commandsInitialize = []
+    self._commandsPostRun = []
+    self._commandsPreRun = []
+    self._commandsTerminate = []
+
+  @property
+  def commandsConfigure(self):
+    """List of UI commands to run during the 'Configure' phase."""
+    return self._commandsConfigure
+
+  @commandsConfigure.setter
+  def commandsConfigure(self, val):
+    self._commandsConfigure = self.makeList(val)
+
+  @property
+  def commandsInitialize(self):
+    """List of UI commands to run during the 'Initialize' phase."""
+    return self._commandsInitialize
+
+  @commandsInitialize.setter
+  def commandsInitialize(self, val):
+    self._commandsInitialize = self.makeList(val)
+
+  @property
+  def commandsPostRun(self):
+    """List of UI commands to run during the 'PostRun' phase."""
+    return self._commandsPostRun
+
+  @commandsPostRun.setter
+  def commandsPostRun(self, val):
+    self._commandsPostRun = self.makeList(val)
+
+  @property
+  def commandsPreRun(self):
+    """List of UI commands to run during the 'PreRun' phase."""
+    return self._commandsPreRun
+
+  @commandsPreRun.setter
+  def commandsPreRun(self, val):
+    self._commandsPreRun = self.makeList(val)
+
+  @property
+  def commandsTerminate(self):
+    """List of UI commands to run during the 'Terminate' phase."""
+    return self._commandsTerminate
+
+  @commandsTerminate.setter
+  def commandsTerminate(self, val):
+    self._commandsTerminate = self.makeList(val)