diff --git a/SilKit/source/services/orchestration/LifecycleService.hpp b/SilKit/source/services/orchestration/LifecycleService.hpp
index 7390c2afd..8b7d2087a 100644
--- a/SilKit/source/services/orchestration/LifecycleService.hpp
+++ b/SilKit/source/services/orchestration/LifecycleService.hpp
@@ -148,7 +148,6 @@ class LifecycleService
     std::atomic<bool> _timeSyncActive{false};
 
     // Final State Handling
-    std::mutex _finalStatePromiseMutex;
     std::unique_ptr<std::promise<ParticipantState>> _finalStatePromise;
 
     std::future<ParticipantState> _finalStateFuture;
diff --git a/SilKit/source/services/orchestration/TimeSyncService.hpp b/SilKit/source/services/orchestration/TimeSyncService.hpp
index 2d87cb2d7..e62bb31e4 100644
--- a/SilKit/source/services/orchestration/TimeSyncService.hpp
+++ b/SilKit/source/services/orchestration/TimeSyncService.hpp
@@ -159,7 +159,6 @@ class TimeSyncService
     WatchDog _watchDog;
     bool _isCoupledToWallClock{false};
     std::thread _wallClockCouplingThread;
-    mutable std::mutex _mx;
     std::atomic<std::chrono::nanoseconds::rep> _currentWallClockSyncPointNs{0};
     double _animationFactor{0};
     std::atomic<bool> _wallClockCouplingThreadRunning{false};
diff --git a/SilKit/source/tracing/PcapSink.cpp b/SilKit/source/tracing/PcapSink.cpp
index 98bd2fef3..ba39fa228 100644
--- a/SilKit/source/tracing/PcapSink.cpp
+++ b/SilKit/source/tracing/PcapSink.cpp
@@ -40,6 +40,8 @@ void PcapSink::Open(SinkType outputType, const std::string& outputPath)
         throw SilKitError("PcapSink::Open: outputPath must not be empty!");
     }
 
+    std::unique_lock<decltype(_lock)> lock{_lock};
+
     switch (outputType)
     {
     case SilKit::SinkType::PcapFile:
@@ -73,6 +75,8 @@ auto PcapSink::Name() const -> const std::string&
 
 void PcapSink::Close()
 {
+    std::unique_lock<decltype(_lock)> lock{_lock};
+
     if (_file)
     {
         _file.flush();
@@ -107,7 +111,7 @@ void PcapSink::Trace(SilKit::Services::TransmitDirection /*unused*/,
     }
     const auto& message = traceMessage.Get<Services::Ethernet::EthernetFrame>();
 
-    std::unique_lock<decltype(_lock)> lock;
+    std::unique_lock<decltype(_lock)> lock{_lock};
 
     const auto tosec = 1000'000ull;
     const auto usec = std::chrono::duration_cast<std::chrono::microseconds>(timestamp);