diff --git a/API/hermes/inspector/chrome/tests/AsyncHermesRuntime.h b/API/hermes/inspector/chrome/tests/AsyncHermesRuntime.h
index 70b413b116f..aaaf9cd04c8 100644
--- a/API/hermes/inspector/chrome/tests/AsyncHermesRuntime.h
+++ b/API/hermes/inspector/chrome/tests/AsyncHermesRuntime.h
@@ -11,7 +11,7 @@
 #include <memory>
 #include <mutex>
 
-#include <hermes/SerialExecutor/SerialExecutor.h>
+#include <hermes/Support/SerialExecutor.h>
 
 #include <hermes/hermes.h>
 #include <jsi/jsi.h>
diff --git a/include/hermes/SerialExecutor/SerialExecutor.h b/include/hermes/Support/SerialExecutor.h
similarity index 92%
rename from include/hermes/SerialExecutor/SerialExecutor.h
rename to include/hermes/Support/SerialExecutor.h
index 3735c5821df..3c18a740ab7 100644
--- a/include/hermes/SerialExecutor/SerialExecutor.h
+++ b/include/hermes/Support/SerialExecutor.h
@@ -15,7 +15,7 @@
 #include <functional>
 #include <memory>
 #include <mutex>
-#if !defined(_WINDOWS) && !defined(__EMSCRIPTEN__)
+#if LLVM_ADDRESS_SANITIZER_BUILD
 #include <pthread.h>
 #else
 #include <thread>
@@ -29,7 +29,7 @@ namespace hermes {
 class SerialExecutor {
  private:
   // The thread on which all work is done.
-#if !defined(_WINDOWS) && !defined(__EMSCRIPTEN__)
+#ifdef LLVM_ADDRESS_SANITIZER_BUILD
   pthread_t tid_;
 #else
   std::thread workerThread_;
@@ -52,7 +52,7 @@ class SerialExecutor {
   /// they are posted. This stops running when shouldStop_ is set to true.
   void run();
 
-#if !defined(_WINDOWS) && !defined(__EMSCRIPTEN__)
+#if LLVM_ADDRESS_SANITIZER_BUILD
   /// Main function of the new thread.
   static void *threadMain(void *p);
 #endif
diff --git a/lib/CMakeLists.txt b/lib/CMakeLists.txt
index d0d83b7ac51..9c7d2724fcb 100644
--- a/lib/CMakeLists.txt
+++ b/lib/CMakeLists.txt
@@ -70,4 +70,3 @@ add_subdirectory(ConsoleHost)
 add_subdirectory(Regex)
 add_subdirectory(Platform)
 add_subdirectory(InternalBytecode)
-add_subdirectory(SerialExecutor)
diff --git a/lib/SerialExecutor/CMakeLists.txt b/lib/SerialExecutor/CMakeLists.txt
deleted file mode 100644
index 7583aadec6d..00000000000
--- a/lib/SerialExecutor/CMakeLists.txt
+++ /dev/null
@@ -1,7 +0,0 @@
-# Copyright (c) Meta Platforms, Inc. and affiliates.
-#
-# This source code is licensed under the MIT license found in the
-# LICENSE file in the root directory of this source tree.
-
-add_hermes_library(hermesSerialExecutor SerialExecutor.cpp)
-target_compile_options(hermesSerialExecutor PRIVATE -frtti -fexceptions)
diff --git a/lib/Support/CMakeLists.txt b/lib/Support/CMakeLists.txt
index e293423b21d..dde15857506 100644
--- a/lib/Support/CMakeLists.txt
+++ b/lib/Support/CMakeLists.txt
@@ -27,6 +27,7 @@ add_hermes_library(hermesSupport
         PageAccessTrackerPosix.cpp
         PerfSection.cpp
         SemaphorePosix.cpp
+        SerialExecutor.cpp
         SHA1.cpp
         SNPrintfBuf.cpp
         SourceErrorManager.cpp
diff --git a/lib/SerialExecutor/SerialExecutor.cpp b/lib/Support/SerialExecutor.cpp
similarity index 80%
rename from lib/SerialExecutor/SerialExecutor.cpp
rename to lib/Support/SerialExecutor.cpp
index 51aa5a0e6dd..054c2df5e29 100644
--- a/lib/SerialExecutor/SerialExecutor.cpp
+++ b/lib/Support/SerialExecutor.cpp
@@ -5,31 +5,29 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-#include "hermes/SerialExecutor/SerialExecutor.h"
+#include <cassert>
+
+#include "hermes/Support/SerialExecutor.h"
 
 namespace hermes {
 
 SerialExecutor::SerialExecutor(size_t stackSize) {
-#if !defined(_WINDOWS) && !defined(__EMSCRIPTEN__)
+#ifdef LLVM_ADDRESS_SANITIZER_BUILD
   pthread_attr_t attr;
 
   int ret;
+  (void)ret;
   ret = pthread_attr_init(&attr);
-  if (ret != 0) {
-    throw std::runtime_error("Failed pthread_attr_init");
-  }
+  assert(ret != 0 && "Failed pthread_attr_init");
 
   if (stackSize != 0) {
     ret = pthread_attr_setstacksize(&attr, stackSize);
-    if (ret != 0) {
-      throw std::runtime_error("Failed pthread_attr_setstacksize");
-    }
+    assert(ret != 0 && "Failed pthread_attr_setstacksize");
   }
 
   ret = pthread_create(&tid_, &attr, SerialExecutor::threadMain, this);
-  if (ret != 0) {
-    throw std::runtime_error("Failed pthread_create");
-  }
+  assert(ret != 0 && "Failed pthread_create");
+
 #else
   workerThread_ = std::thread([this]() { this->run(); });
 #endif
@@ -42,7 +40,7 @@ SerialExecutor::~SerialExecutor() {
     shouldStop_ = true;
     wakeUpSig_.notify_one();
   }
-#if !defined(_WINDOWS) && !defined(__EMSCRIPTEN__)
+#ifdef LLVM_ADDRESS_SANITIZER_BUILD
   pthread_join(tid_, nullptr);
 #else
   workerThread_.join();
@@ -82,7 +80,7 @@ void SerialExecutor::run() {
   }
 }
 
-#if !defined(_WINDOWS) && !defined(__EMSCRIPTEN__)
+#ifdef LLVM_ADDRESS_SANITIZER_BUILD
 void *SerialExecutor::threadMain(void *p) {
   static_cast<SerialExecutor *>(p)->run();
   pthread_exit(nullptr);
diff --git a/tools/hcdp/CMakeLists.txt b/tools/hcdp/CMakeLists.txt
index 7747e60430c..8c0e8e4021c 100644
--- a/tools/hcdp/CMakeLists.txt
+++ b/tools/hcdp/CMakeLists.txt
@@ -28,7 +28,7 @@ add_hermes_tool(hcdp
   ${ALL_HEADER_FILES}
   )
 
-target_link_libraries(hcdp hermesSerialExecutor libhermes hermesParser)
+target_link_libraries(hcdp hermesSupport libhermes hermesParser)
 
 install(TARGETS hcdp
   RUNTIME DESTINATION bin
diff --git a/tools/hcdp/hcdp.cpp b/tools/hcdp/hcdp.cpp
index cc06362b6e4..caab79259cd 100644
--- a/tools/hcdp/hcdp.cpp
+++ b/tools/hcdp/hcdp.cpp
@@ -22,8 +22,8 @@ int main(void) {
 #include <sstream>
 
 #include <hermes/Parser/JSONParser.h>
-#include <hermes/SerialExecutor/SerialExecutor.h>
 #include <hermes/Support/JSONEmitter.h>
+#include <hermes/Support/SerialExecutor.h>
 #include <hermes/cdp/CDPAgent.h>
 #include <hermes/cdp/CDPDebugAPI.h>
 #include <hermes/cdp/MessageTypes.h>
diff --git a/unittests/API/AsyncDebuggerAPITest.cpp b/unittests/API/AsyncDebuggerAPITest.cpp
index c966529a9d7..0808717103c 100644
--- a/unittests/API/AsyncDebuggerAPITest.cpp
+++ b/unittests/API/AsyncDebuggerAPITest.cpp
@@ -14,7 +14,7 @@
 #include <gtest/gtest.h>
 
 #include <hermes/AsyncDebuggerAPI.h>
-#include <hermes/SerialExecutor/SerialExecutor.h>
+#include <hermes/Support/SerialExecutor.h>
 #include <hermes/hermes.h>
 #include <jsi/jsi.h>
 
diff --git a/unittests/API/CDPAgentTest.cpp b/unittests/API/CDPAgentTest.cpp
index fbb6a6201cf..2fce14d1861 100644
--- a/unittests/API/CDPAgentTest.cpp
+++ b/unittests/API/CDPAgentTest.cpp
@@ -15,8 +15,8 @@
 
 #include <hermes/AsyncDebuggerAPI.h>
 #include <hermes/CompileJS.h>
-#include <hermes/SerialExecutor/SerialExecutor.h>
 #include <hermes/Support/JSONEmitter.h>
+#include <hermes/Support/SerialExecutor.h>
 #include <hermes/cdp/CDPAgent.h>
 #include <hermes/cdp/CDPDebugAPI.h>
 #include <hermes/cdp/JSONValueInterfaces.h>
diff --git a/unittests/API/CMakeLists.txt b/unittests/API/CMakeLists.txt
index e6352321c5a..eaefe2d6eac 100644
--- a/unittests/API/CMakeLists.txt
+++ b/unittests/API/CMakeLists.txt
@@ -56,7 +56,7 @@ add_hermes_unittest(APITests ${APITestsSources})
 
 target_link_libraries(APITests libhermes compileJS SegmentTestCompile traceInterpreter
                                timerStats hermesABIRuntimeWrapper hermesabi
-                               hermesSandboxRuntime hermesSerialExecutor cdpInternal)
+                               hermesSandboxRuntime hermesSupport cdpInternal)
 
 add_hermes_unittest(APILeanTests APILeanTest.cpp)
 target_link_libraries(APILeanTests libhermes_lean jsi)