diff --git a/.github/scripts/runPythonChecks.sh b/.github/scripts/runPythonChecks.sh
index 850597d50..4e228e24d 100755
--- a/.github/scripts/runPythonChecks.sh
+++ b/.github/scripts/runPythonChecks.sh
@@ -3,8 +3,5 @@
 source /cvmfs/sft.cern.ch/lcg/views/${VIEW}/setup.sh
 cd /Package
 
-echo "RUNNING PYLINT PY3K CHECK" && \
-find . -name "*.py" -and -not -name 'ddsix.py' -exec pylint --rcfile=.github/scripts/DD4hep.pylint.py3k.rc --py3k --msg-template="{path}:{line}: [{msg_id}({symbol}), {obj}] {msg}" {} + && \
-echo "" && \
 echo "RUNNING FLAKE8 CHECK" && \
 find . -name "*.py" -and -not -name 'ddsix.py' -exec flake8 {} +
diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index 842040d54..dc1475473 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -82,8 +82,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        view-path: ["/cvmfs/sw.hsf.org/key4hep/",
-                    "/cvmfs/sw-nightlies.hsf.org/key4hep/"]
+        view-path: ["/cvmfs/sw-nightlies.hsf.org/key4hep/"]
     steps:
     - uses: actions/checkout@v3
     - uses: cvmfs-contrib/github-action-cvmfs@v3
diff --git a/.github/workflows/python.yml b/.github/workflows/python.yml
index e6e622fde..eb6016e07 100644
--- a/.github/workflows/python.yml
+++ b/.github/workflows/python.yml
@@ -15,8 +15,5 @@ jobs:
       with:
         release-platform: ${{ matrix.LCG }}
         run: |
-          echo "RUNNING PYLINT PY3K CHECK"
-          find . -name "*.py" -and -not -name 'ddsix.py' -exec pylint --rcfile=.github/scripts/DD4hep.pylint.py3k.rc --py3k --msg-template="{path}:{line}: [{msg_id}({symbol}), {obj}] {msg}" {} +
-          echo ""
           echo "RUNNING FLAKE8 CHECK"
           find . -name "*.py" -and -not -name 'ddsix.py' -exec flake8 {} +
diff --git a/DDG4/include/DDG4/Geant4UIManager.h b/DDG4/include/DDG4/Geant4UIManager.h
index b696a7cde..2bcfa4e2f 100644
--- a/DDG4/include/DDG4/Geant4UIManager.h
+++ b/DDG4/include/DDG4/Geant4UIManager.h
@@ -58,15 +58,15 @@ namespace dd4hep {
       std::string m_uiSetup;
       /// Property: Name of the visualization macro file
       std::string m_visSetup;
-      /// Property: Array of macro files to be chained and executed when the Geant4Kernel gets configured
+      /// Property: List of commands to be executed when the Geant4Kernel gets configured
       std::vector<std::string> m_configureCommands;
-      /// Property: Array of macro files to be chained and executed when the Geant4Kernel gets initialized
+      /// Property: List of commands to be executed when the Geant4Kernel gets initialized
       std::vector<std::string> m_initializeCommands;
-      /// Property: Array of macro files to be chained and executed when the Geant4Kernel gets terminated
+      /// Property: List of commands to be executed when the Geant4Kernel gets terminated
       std::vector<std::string> m_terminateCommands;
-      /// Property: Array of macro files to be chained and executed BEFORE running
+      /// Property: List of commands to be executed BEFORE running
       std::vector<std::string> m_preRunCommands;
-      /// Property: Array of macro files to be chained and executed AFTER running
+      /// Property: List of commands to be executed AFTER running
       std::vector<std::string> m_postRunCommands;
       /// Property: Array of commands to be chained
       std::vector<std::string> m_macros;
diff --git a/DDG4/python/DDSim/DD4hepSimulation.py b/DDG4/python/DDSim/DD4hepSimulation.py
index 9b8708edf..8c25b442a 100644
--- a/DDG4/python/DDSim/DD4hepSimulation.py
+++ b/DDG4/python/DDSim/DD4hepSimulation.py
@@ -28,6 +28,7 @@
 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 @@ def __init__(self):
     self.geometry = Geometry()
     self.filter = Filter()
     self.physics = Physics()
+    self.ui = UI()
 
     self._argv = None
 
@@ -317,19 +319,26 @@ def run(self):
     geant4.printDetectors()
 
     if self.runType == "vis":
-      geant4.setupUI(typ="tcsh", vis=True, macro=self.macroFile)
+      uiaction = geant4.setupUI(typ="tcsh", vis=True, macro=self.macroFile)
     elif self.runType == "qt":
-      geant4.setupUI(typ="qt", vis=True, macro=self.macroFile)
+      uiaction = geant4.setupUI(typ="qt", vis=True, macro=self.macroFile)
     elif self.runType == "run":
-      geant4.setupUI(typ="tcsh", vis=False, macro=self.macroFile, ui=False)
+      uiaction = geant4.setupUI(typ="tcsh", vis=False, macro=self.macroFile, ui=False)
     elif self.runType == "shell":
-      geant4.setupUI(typ="tcsh", vis=False, macro=None, ui=True)
+      uiaction = geant4.setupUI(typ="tcsh", vis=False, macro=None, ui=True)
     elif self.runType == "batch":
-      geant4.setupUI(typ="tcsh", vis=False, macro=None, ui=False)
+      uiaction = geant4.setupUI(typ="tcsh", vis=False, macro=None, ui=False)
     else:
       logger.error("unknown runType")
       exit(1)
 
+    # User Configuration for the Geant4Phases
+    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/UI.py b/DDG4/python/DDSim/Helper/UI.py
new file mode 100644
index 000000000..053cb84f3
--- /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)