diff --git a/Detector/DetComponents/src/GeoConstruction.cpp b/Detector/DetComponents/src/GeoConstruction.cpp
index 5bbca28..57ef044 100644
--- a/Detector/DetComponents/src/GeoConstruction.cpp
+++ b/Detector/DetComponents/src/GeoConstruction.cpp
@@ -15,7 +15,7 @@
 
 namespace det {
   
-GeoConstruction::GeoConstruction(dd4hep::Detector& lcdd, std::map<std::string, std::string> sensitive_types) : m_lcdd(lcdd), m_sensitive_types(sensitive_types) {}
+GeoConstruction::GeoConstruction(dd4hep::Detector& detector, std::map<std::string, std::string> sensitive_types) : m_detector(detector), m_sensitive_types(sensitive_types) {}
 
 GeoConstruction::~GeoConstruction() {}
 
@@ -35,15 +35,15 @@ void GeoConstruction::ConstructSDandField() {
       typ = m_sensitive_types[typ];
     }
     // Sensitive detectors are deleted in ~G4SDManager
-    G4VSensitiveDetector* g4sd = dd4hep::PluginService::Create<G4VSensitiveDetector*>(typ, nam, &m_lcdd);
+    G4VSensitiveDetector* g4sd = dd4hep::PluginService::Create<G4VSensitiveDetector*>(typ, nam, &m_detector);
     if (g4sd == nullptr) {
       std::string tmp = typ;
       tmp[0] = ::toupper(tmp[0]);
       typ = "Geant4" + tmp;
-      g4sd = dd4hep::PluginService::Create<G4VSensitiveDetector*>(typ, nam, &m_lcdd);
+      g4sd = dd4hep::PluginService::Create<G4VSensitiveDetector*>(typ, nam, &m_detector);
       if (g4sd == nullptr) {
         dd4hep::PluginDebug dbg;
-        g4sd = dd4hep::PluginService::Create<G4VSensitiveDetector*>(typ, nam, &m_lcdd);
+        g4sd = dd4hep::PluginService::Create<G4VSensitiveDetector*>(typ, nam, &m_detector);
         if (g4sd == nullptr) {
           throw std::runtime_error("ConstructSDandField: FATAL Failed to "
                                    "create Geant4 sensitive detector " +
@@ -70,14 +70,14 @@ void GeoConstruction::ConstructSDandField() {
 // method borrowed from dd4hep::sim::Geant4DetectorConstruction::Construct()
 G4VPhysicalVolume* GeoConstruction::Construct() {
   dd4hep::sim::Geant4Mapping& g4map = dd4hep::sim::Geant4Mapping::instance();
-  dd4hep::DetElement world = m_lcdd.world();
-  dd4hep::sim::Geant4Converter conv(m_lcdd, dd4hep::DEBUG);
+  dd4hep::DetElement world = m_detector.world();
+  dd4hep::sim::Geant4Converter conv(m_detector, dd4hep::DEBUG);
   dd4hep::sim::Geant4GeometryInfo* geo_info = conv.create(world).detach();
   g4map.attach(geo_info);
   // All volumes are deleted in ~G4PhysicalVolumeStore()
   G4VPhysicalVolume* m_world = geo_info->world();
-  if(not m_lcdd.volumeManager().isValid()) {
-    m_lcdd.apply("DD4hepVolumeManager", 0, 0);
+  if(not m_detector.volumeManager().isValid()) {
+    m_detector.apply("DD4hepVolumeManager", 0, 0);
   }
   // Create Geant4 volume manager
   g4map.volumeManager();
diff --git a/Detector/DetComponents/src/GeoConstruction.h b/Detector/DetComponents/src/GeoConstruction.h
index c057b53..521f9a3 100644
--- a/Detector/DetComponents/src/GeoConstruction.h
+++ b/Detector/DetComponents/src/GeoConstruction.h
@@ -24,7 +24,7 @@ namespace det {
 class GeoConstruction : public G4VUserDetectorConstruction {
 public:
   /// Constructor
-  GeoConstruction(dd4hep::Detector& lcdd, std::map<std::string, std::string> sensitive_types);
+  GeoConstruction(dd4hep::Detector& detector, std::map<std::string, std::string> sensitive_types);
   /// Default destructor
   virtual ~GeoConstruction();
   /// Geometry construction callback: Invoke the conversion to Geant4
@@ -35,7 +35,7 @@ class GeoConstruction : public G4VUserDetectorConstruction {
 
 private:
   /// Reference to geometry object
-  dd4hep::Detector& m_lcdd;
+  dd4hep::Detector& m_detector;
   std::map<std::string, std::string> m_sensitive_types;
 };
 }
diff --git a/Detector/DetComponents/src/GeoSvc.cpp b/Detector/DetComponents/src/GeoSvc.cpp
index d487161..0c85607 100644
--- a/Detector/DetComponents/src/GeoSvc.cpp
+++ b/Detector/DetComponents/src/GeoSvc.cpp
@@ -46,13 +46,15 @@ StatusCode GeoSvc::initialize() {
   }
 
   // Build Geant4 Geometry
-  {
+  if(m_buildGeant4Geo) {
     StatusCode sc = buildGeant4Geo();
     if (sc.isFailure()) {
       error() << "Could not build Geant4 geometry!" << endmsg;
     } else {
       info() << "Geant4 geometry SUCCESSFULLY built." << endmsg;
     }
+  } else {
+    debug() << "Conversion to Geant4 Geometry is disabled" << endmsg;
   }
 
   return StatusCode::SUCCESS;
@@ -82,13 +84,17 @@ StatusCode GeoSvc::buildDD4HepGeo() {
   return StatusCode::SUCCESS;
 }
 
-dd4hep::Detector* GeoSvc::lcdd() { return (m_dd4hepgeo); }
+dd4hep::Detector* GeoSvc::lcdd() { return m_dd4hepgeo; }
+
+dd4hep::Detector* GeoSvc::getDetector() { return m_dd4hepgeo; }
 
-dd4hep::DetElement GeoSvc::getDD4HepGeo() { return (lcdd()->world()); }
+dd4hep::DetElement GeoSvc::getDD4HepGeo() { return m_dd4hepgeo->world(); }
 
 StatusCode GeoSvc::buildGeant4Geo() {
-  std::shared_ptr<G4VUserDetectorConstruction> detector(new det::GeoConstruction(*lcdd(), m_sensitive_types));
-  m_geant4geo = detector;
+  if (not m_buildGeant4Geo) {
+    return StatusCode::SUCCESS;
+  }
+  m_geant4geo = std::make_shared<det::GeoConstruction>(*m_dd4hepgeo, m_sensitive_types);
   if (nullptr != m_geant4geo) {
     return StatusCode::SUCCESS;
   }
@@ -97,3 +103,7 @@ StatusCode GeoSvc::buildGeant4Geo() {
 }
 
 G4VUserDetectorConstruction* GeoSvc::getGeant4Geo() { return (m_geant4geo.get()); }
+
+std::string GeoSvc::constantAsString(std::string const& name) {
+  return m_dd4hepgeo->constantAsString(name);
+}
diff --git a/Detector/DetComponents/src/GeoSvc.h b/Detector/DetComponents/src/GeoSvc.h
index 580cb53..2626b33 100644
--- a/Detector/DetComponents/src/GeoSvc.h
+++ b/Detector/DetComponents/src/GeoSvc.h
@@ -37,7 +37,10 @@ class GeoSvc : public extends<Service, IGeoSvc> {
   StatusCode buildGeant4Geo();
   // receive DD4hep Geometry
   virtual dd4hep::DetElement getDD4HepGeo() override;
+  [[deprecated("Use getDetector() instead")]]
   virtual dd4hep::Detector* lcdd() override;
+  virtual dd4hep::Detector* getDetector() override;
+  virtual std::string constantAsString(std::string const& name) override;
   // receive Geant4 Geometry
   virtual G4VUserDetectorConstruction* getGeant4Geo() override;
 
@@ -50,6 +53,9 @@ class GeoSvc : public extends<Service, IGeoSvc> {
   Gaudi::Property<std::vector<std::string>> m_xmlFileNames{this, "detectors", {}, "Detector descriptions XML-files"};
   /// mapping of sensitive detector names
   Gaudi::Property<std::map<std::string, std::string>> m_sensitive_types{this, "sensitiveTypes", {{"tracker", "SimpleTrackerSD"}, {"calorimeter", "SimpleCalorimeterSD"}}};
+  /// Whether to create the geant4 geometry or not
+  Gaudi::Property<bool> m_buildGeant4Geo{this, "EnableGeant4Geo", true, "If True the DD4hep geometry is converted for Geant4 Simulations"};
+
 };
 
 #endif  // GEOSVC_H
diff --git a/Detector/DetComponents/src/MaterialScan.cpp b/Detector/DetComponents/src/MaterialScan.cpp
index 986c805..cc2c48f 100644
--- a/Detector/DetComponents/src/MaterialScan.cpp
+++ b/Detector/DetComponents/src/MaterialScan.cpp
@@ -65,7 +65,7 @@ StatusCode MaterialScan::initialize() {
   tree->Branch("matDepth", &matDepthPtr);
   tree->Branch("material", &materialPtr);
 
-  auto lcdd = m_geoSvc->lcdd();
+  auto lcdd = m_geoSvc->getDetector();
   dd4hep::rec::MaterialManager matMgr(lcdd->detector(m_envelopeName).volume());
   dd4hep::rec::Vector3D beginning(0, 0, 0);
   auto boundaryVol = lcdd->detector(m_envelopeName).volume()->GetShape();
diff --git a/Detector/DetComponents/src/MaterialScan_2D_genericAngle.cpp b/Detector/DetComponents/src/MaterialScan_2D_genericAngle.cpp
index e64bbe2..d4ea2e0 100644
--- a/Detector/DetComponents/src/MaterialScan_2D_genericAngle.cpp
+++ b/Detector/DetComponents/src/MaterialScan_2D_genericAngle.cpp
@@ -67,7 +67,7 @@ StatusCode MaterialScan_2D_genericAngle::initialize() {
   tree->Branch("matDepth", &matDepthPtr);
   tree->Branch("material", &materialPtr);
 
-  auto lcdd = m_geoSvc->lcdd();
+  auto lcdd = m_geoSvc->getDetector();
   dd4hep::rec::MaterialManager matMgr(lcdd->detector(m_envelopeName).volume());
   dd4hep::rec::Vector3D beginning(0, 0, 0);
   auto boundaryVol = lcdd->detector(m_envelopeName).volume()->GetShape();
diff --git a/Detector/DetComponents/src/MaterialScan_genericAngle.cpp b/Detector/DetComponents/src/MaterialScan_genericAngle.cpp
index ed061da..36b1fce 100644
--- a/Detector/DetComponents/src/MaterialScan_genericAngle.cpp
+++ b/Detector/DetComponents/src/MaterialScan_genericAngle.cpp
@@ -72,7 +72,7 @@ StatusCode MaterialScan_genericAngle::initialize() {
   tree->Branch("matDepth", &matDepthPtr);
   tree->Branch("material", &materialPtr);
 
-  auto lcdd = m_geoSvc->lcdd();
+  auto lcdd = m_geoSvc->getDetector();
   dd4hep::rec::MaterialManager matMgr(lcdd->detector(m_envelopeName).volume());
   dd4hep::rec::Vector3D beginning(0, 0, 0);
   auto boundaryVol = lcdd->detector(m_envelopeName).volume()->GetShape();
diff --git a/Detector/DetComponents/src/MergeCells.cpp b/Detector/DetComponents/src/MergeCells.cpp
index 1b0cc22..b4e1e3c 100644
--- a/Detector/DetComponents/src/MergeCells.cpp
+++ b/Detector/DetComponents/src/MergeCells.cpp
@@ -34,11 +34,11 @@ StatusCode MergeCells::initialize() {
     return StatusCode::FAILURE;
   }
   // check if readout exists
-  if (m_geoSvc->lcdd()->readouts().find(m_readoutName) == m_geoSvc->lcdd()->readouts().end()) {
+  if (m_geoSvc->getDetector()->readouts().find(m_readoutName) == m_geoSvc->getDetector()->readouts().end()) {
     error() << "Readout <<" << m_readoutName << ">> does not exist." << endmsg;
     return StatusCode::FAILURE;
   }
-  auto readout = m_geoSvc->lcdd()->readout(m_readoutName);
+  auto readout = m_geoSvc->getDetector()->readout(m_readoutName);
   m_descriptor = readout.idSpec();
   // check if identifier exists in the decoder
   auto itIdentifier = std::find_if(m_descriptor.fields().begin(),
diff --git a/Detector/DetComponents/src/MergeLayers.cpp b/Detector/DetComponents/src/MergeLayers.cpp
index 4d2dfb7..5e5ccc2 100644
--- a/Detector/DetComponents/src/MergeLayers.cpp
+++ b/Detector/DetComponents/src/MergeLayers.cpp
@@ -37,11 +37,11 @@ StatusCode MergeLayers::initialize() {
     return StatusCode::FAILURE;
   }
   // check if readout exists
-  if (m_geoSvc->lcdd()->readouts().find(m_readoutName) == m_geoSvc->lcdd()->readouts().end()) {
+  if (m_geoSvc->getDetector()->readouts().find(m_readoutName) == m_geoSvc->getDetector()->readouts().end()) {
     error() << "Readout <<" << m_readoutName << ">> does not exist." << endmsg;
     return StatusCode::FAILURE;
   }
-  auto readout = m_geoSvc->lcdd()->readout(m_readoutName);
+  auto readout = m_geoSvc->getDetector()->readout(m_readoutName);
   m_descriptor = readout.idSpec();
   // check if identifier exists in the decoder
   auto itIdentifier = std::find_if(m_descriptor.fields().begin(),
diff --git a/Detector/DetComponents/src/RedoSegmentation.cpp b/Detector/DetComponents/src/RedoSegmentation.cpp
index a8d1a3d..9db5e38 100644
--- a/Detector/DetComponents/src/RedoSegmentation.cpp
+++ b/Detector/DetComponents/src/RedoSegmentation.cpp
@@ -21,16 +21,16 @@ StatusCode RedoSegmentation::initialize() {
     return StatusCode::FAILURE;
   }
   // check if readouts exist
-  if (m_geoSvc->lcdd()->readouts().find(m_oldReadoutName) == m_geoSvc->lcdd()->readouts().end()) {
+  if (m_geoSvc->getDetector()->readouts().find(m_oldReadoutName) == m_geoSvc->getDetector()->readouts().end()) {
     error() << "Readout <<" << m_oldReadoutName << ">> does not exist." << endmsg;
     return StatusCode::FAILURE;
   }
-  if (m_geoSvc->lcdd()->readouts().find(m_newReadoutName) == m_geoSvc->lcdd()->readouts().end()) {
+  if (m_geoSvc->getDetector()->readouts().find(m_newReadoutName) == m_geoSvc->getDetector()->readouts().end()) {
     error() << "Readout <<" << m_newReadoutName << ">> does not exist." << endmsg;
     return StatusCode::FAILURE;
   }
   // Take readout, bitfield from GeoSvc
-  m_oldDecoder = m_geoSvc->lcdd()->readout(m_oldReadoutName).idSpec().decoder();
+  m_oldDecoder = m_geoSvc->getDetector()->readout(m_oldReadoutName).idSpec().decoder();
   // segmentation identifiers to be overwritten
   if (m_oldIdentifiers.size() == 0) {
     // it is not an error, maybe no segmentation was used previously
@@ -45,7 +45,7 @@ StatusCode RedoSegmentation::initialize() {
     }
   }
   // Take new segmentation from geometry service
-  m_segmentation = m_geoSvc->lcdd()->readout(m_newReadoutName).segmentation().segmentation();
+  m_segmentation = m_geoSvc->getDetector()->readout(m_newReadoutName).segmentation().segmentation();
   // check if detector identifiers (old and new) agree
   std::vector<std::string> newFields;
   for (uint itField = 0; itField < m_segmentation->decoder()->size(); itField++) {
diff --git a/Detector/DetComponents/src/RewriteBitfield.cpp b/Detector/DetComponents/src/RewriteBitfield.cpp
index 70f569a..1792691 100644
--- a/Detector/DetComponents/src/RewriteBitfield.cpp
+++ b/Detector/DetComponents/src/RewriteBitfield.cpp
@@ -28,16 +28,16 @@ StatusCode RewriteBitfield::initialize() {
     return StatusCode::FAILURE;
   }
   // check if readouts exist
-  if (m_geoSvc->lcdd()->readouts().find(m_oldReadoutName) == m_geoSvc->lcdd()->readouts().end()) {
+  if (m_geoSvc->getDetector()->readouts().find(m_oldReadoutName) == m_geoSvc->getDetector()->readouts().end()) {
     error() << "Readout <<" << m_oldReadoutName << ">> does not exist." << endmsg;
     return StatusCode::FAILURE;
   }
-  if (m_geoSvc->lcdd()->readouts().find(m_newReadoutName) == m_geoSvc->lcdd()->readouts().end()) {
+  if (m_geoSvc->getDetector()->readouts().find(m_newReadoutName) == m_geoSvc->getDetector()->readouts().end()) {
     error() << "Readout <<" << m_newReadoutName << ">> does not exist." << endmsg;
     return StatusCode::FAILURE;
   }
   // Take readout, bitfield from GeoSvc
-  m_oldDecoder = m_geoSvc->lcdd()->readout(m_oldReadoutName).idSpec().decoder();
+  m_oldDecoder = m_geoSvc->getDetector()->readout(m_oldReadoutName).idSpec().decoder();
   // segmentation identifiers to be overwritten
   if (m_oldIdentifiers.size() == 0) {
     // it is not an error, maybe no segmentation was used previously
@@ -52,7 +52,7 @@ StatusCode RewriteBitfield::initialize() {
     }
   }
   std::vector<std::string> newFields;
-  m_newDecoder = m_geoSvc->lcdd()->readout(m_newReadoutName).idSpec().decoder();
+  m_newDecoder = m_geoSvc->getDetector()->readout(m_newReadoutName).idSpec().decoder();
   for (uint itField = 0; itField < m_newDecoder->size(); itField++) {
     newFields.push_back((*m_newDecoder)[itField].name());
   }
diff --git a/Detector/DetStudies/src/components/EnergyInCaloLayers.cpp b/Detector/DetStudies/src/components/EnergyInCaloLayers.cpp
index f6c3c6b..8252f24 100644
--- a/Detector/DetStudies/src/components/EnergyInCaloLayers.cpp
+++ b/Detector/DetStudies/src/components/EnergyInCaloLayers.cpp
@@ -40,7 +40,7 @@ StatusCode EnergyInCaloLayers::initialize() {
   }
 
   // Check if readout exists
-  if (m_geoSvc->lcdd()->readouts().find(m_readoutName) == m_geoSvc->lcdd()->readouts().end()) {
+  if (m_geoSvc->getDetector()->readouts().find(m_readoutName) == m_geoSvc->getDetector()->readouts().end()) {
     error() << "Can't find readout <<" << m_readoutName << ">>!" << endmsg;
     return StatusCode::FAILURE;
   }
@@ -64,7 +64,7 @@ StatusCode EnergyInCaloLayers::initialize() {
 
 
 StatusCode EnergyInCaloLayers::execute() {
-  auto decoder = m_geoSvc->lcdd()->readout(m_readoutName).idSpec().decoder();
+  auto decoder = m_geoSvc->getDetector()->readout(m_readoutName).idSpec().decoder();
 
   // Initialize output variables
   std::vector<double>* energyInLayer = m_energyInLayer.createAndPut();
diff --git a/Detector/DetStudies/src/components/SamplingFractionInLayers.cpp b/Detector/DetStudies/src/components/SamplingFractionInLayers.cpp
index 1a71a7b..1c1fca5 100644
--- a/Detector/DetStudies/src/components/SamplingFractionInLayers.cpp
+++ b/Detector/DetStudies/src/components/SamplingFractionInLayers.cpp
@@ -32,7 +32,7 @@ StatusCode SamplingFractionInLayers::initialize() {
     return StatusCode::FAILURE;
   }
   // check if readouts exist
-  if (m_geoSvc->lcdd()->readouts().find(m_readoutName) == m_geoSvc->lcdd()->readouts().end()) {
+  if (m_geoSvc->getDetector()->readouts().find(m_readoutName) == m_geoSvc->getDetector()->readouts().end()) {
     error() << "Readout <<" << m_readoutName << ">> does not exist." << endmsg;
     return StatusCode::FAILURE;
   }
@@ -78,7 +78,7 @@ StatusCode SamplingFractionInLayers::initialize() {
 }
 
 StatusCode SamplingFractionInLayers::execute() {
-  auto decoder = m_geoSvc->lcdd()->readout(m_readoutName).idSpec().decoder();
+  auto decoder = m_geoSvc->getDetector()->readout(m_readoutName).idSpec().decoder();
   double sumE = 0.;
   std::vector<double> sumElayers;
   double sumEactive = 0.;
diff --git a/SimG4Components/src/InspectHitsCollectionsTool.cpp b/SimG4Components/src/InspectHitsCollectionsTool.cpp
index f81a9f9..deda4d8 100644
--- a/SimG4Components/src/InspectHitsCollectionsTool.cpp
+++ b/SimG4Components/src/InspectHitsCollectionsTool.cpp
@@ -1,7 +1,9 @@
 #include "InspectHitsCollectionsTool.h"
 
+// k4FWCore
+#include "k4Interface/IGeoSvc.h"
+
 // FCCSW
-#include "SimG4Interface/IGeoSvc.h"
 #include "SimG4Common/Geant4CaloHit.h"
 #include "SimG4Common/Geant4PreDigiTrackHit.h"
 
diff --git a/SimG4Components/src/SimG4DD4hepDetector.cpp b/SimG4Components/src/SimG4DD4hepDetector.cpp
index 74dd1de..2ef500e 100644
--- a/SimG4Components/src/SimG4DD4hepDetector.cpp
+++ b/SimG4Components/src/SimG4DD4hepDetector.cpp
@@ -1,7 +1,7 @@
 #include "SimG4DD4hepDetector.h"
 
-// FCCSW
-#include "SimG4Interface/IGeoSvc.h"
+// k4FWCore
+#include "k4Interface/IGeoSvc.h"
 
 // Geant4
 #include "G4VUserDetectorConstruction.hh"
diff --git a/SimG4Components/src/SimG4MagneticFieldTool.cpp b/SimG4Components/src/SimG4MagneticFieldTool.cpp
index de5d17c..71c923b 100644
--- a/SimG4Components/src/SimG4MagneticFieldTool.cpp
+++ b/SimG4Components/src/SimG4MagneticFieldTool.cpp
@@ -56,7 +56,7 @@ StatusCode SimG4MagneticFieldTool::initialize() {
   }
 
   info() << "Adding following field(s):" << endmsg;
-  dd4hep::Detector* detDescription = m_geoSvc->lcdd();
+  dd4hep::Detector* detDescription = m_geoSvc->getDetector();
   auto fields = detDescription->fields();
   for (const auto& field : fields) {
     info() << "  - " << field.first << ": " << field.second->type << endmsg;
diff --git a/SimG4Components/src/SimG4SaveCalHits.cpp b/SimG4Components/src/SimG4SaveCalHits.cpp
index 408a5aa..4a6d2bc 100644
--- a/SimG4Components/src/SimG4SaveCalHits.cpp
+++ b/SimG4Components/src/SimG4SaveCalHits.cpp
@@ -66,7 +66,7 @@ StatusCode SimG4SaveCalHits::initialize() {
     return StatusCode::FAILURE;
   }
 
-  auto lcdd = m_geoSvc->lcdd();
+  auto lcdd = m_geoSvc->getDetector();
   auto allReadouts = lcdd->readouts();
   if (allReadouts.find(m_readoutName) == allReadouts.end()) {
     error() << "Readout " << m_readoutName << " not found! "
diff --git a/SimG4Components/src/SimG4SaveTrackerHits.cpp b/SimG4Components/src/SimG4SaveTrackerHits.cpp
index ca7d344..7b8cc09 100644
--- a/SimG4Components/src/SimG4SaveTrackerHits.cpp
+++ b/SimG4Components/src/SimG4SaveTrackerHits.cpp
@@ -65,7 +65,7 @@ StatusCode SimG4SaveTrackerHits::initialize() {
     return StatusCode::FAILURE;
   }
 
-  auto lcdd = m_geoSvc->lcdd();
+  auto lcdd = m_geoSvc->getDetector();
   auto allReadouts = lcdd->readouts();
   if (allReadouts.find(m_readoutName) == allReadouts.end()) {
     error() << "Readout " << m_readoutName << " not found! "
diff --git a/SimG4Components/src/SimG4SaveTrajectory.cpp b/SimG4Components/src/SimG4SaveTrajectory.cpp
index 21722a9..12cc083 100644
--- a/SimG4Components/src/SimG4SaveTrajectory.cpp
+++ b/SimG4Components/src/SimG4SaveTrajectory.cpp
@@ -1,7 +1,9 @@
 #include "SimG4SaveTrajectory.h"
 
+// k4FwCore
+#include "k4Interface/IGeoSvc.h"
+
 // FCCSW
-#include "SimG4Interface/IGeoSvc.h"
 #include "SimG4Common/Units.h"
 
 // Geant4
diff --git a/SimG4Interface/include/SimG4Interface/IGeoSvc.h b/SimG4Interface/include/SimG4Interface/IGeoSvc.h
deleted file mode 100644
index 4aa7c04..0000000
--- a/SimG4Interface/include/SimG4Interface/IGeoSvc.h
+++ /dev/null
@@ -1,35 +0,0 @@
-//
-//  IGeoSvc.h
-//
-//
-//  Created by Julia Hrdinka on 30/03/15.
-//
-//
-
-#ifndef IGEOSVC_H
-#define IGEOSVC_H
-
-#include "GaudiKernel/IService.h"
-
-namespace dd4hep {
-class Detector;
-class DetElement;
-}
-
-class G4VUserDetectorConstruction;
-
-class GAUDI_API IGeoSvc : virtual public IService {
-
-public:
-  /// InterfaceID
-  DeclareInterfaceID(IGeoSvc, 1, 0);
-  // receive DD4hep Geometry
-  virtual dd4hep::DetElement getDD4HepGeo() = 0;
-  virtual dd4hep::Detector* lcdd() = 0;
-  // receive Geant4 Geometry
-  virtual G4VUserDetectorConstruction* getGeant4Geo() = 0;
-
-  virtual ~IGeoSvc() {}
-};
-
-#endif  // IGEOSVC_H