diff --git a/Source/Contents/JobCodeForItem.cpp b/Source/Contents/JobCodeForItem.cpp
new file mode 100644
index 00000000..21306ad4
--- /dev/null
+++ b/Source/Contents/JobCodeForItem.cpp
@@ -0,0 +1,125 @@
+#include "Contents/JobCodeForItem.h"
+#include "Contents/Jobs/JobId.h"
+
+// OFFSET: 0x006C7720
+// OFFSET: 0x006C7920
+// OFFSET: 0x006C7B30
+// OFFSET: 0x006C7D40
+// OFFSET: 0x006C7F60
+// OFFSET: 0x006C8180
+// OFFSET: 0x006C83A0
+// OFFSET: 0x006C85D0
+// OFFSET: 0x006C8810
+// FUNCTION: fn_06421
+// FUNCTION: fn_06422
+// FUNCTION: fn_06423
+// FUNCTION: fn_06424
+// FUNCTION: fn_06425
+// FUNCTION: fn_06426
+// FUNCTION: fn_06427
+// FUNCTION: fn_06428
+// FUNCTION: fn_06429
+template <typename... Groups>
+void CJobCodeForItem::AddJobCodeFromGroups(unsigned long code, Groups... groups) {
+  std::set<unsigned int> groupSet = {static_cast<unsigned int>(groups)...};
+  if (!groupSet.empty()) {
+    std::set<int> jobs;
+    for (const unsigned int& group : groupSet) {
+      auto groupIt = this->m_jobGroups.find(group);
+      if (groupIt != this->m_jobGroups.end()) {
+        jobs.merge(std::set<int>(groupIt->second));
+      }
+    }
+
+    auto it = this->m_jobCodes.find(code);
+    if (it == this->m_jobCodes.end()) {
+      this->m_jobCodes[code] = jobs;
+    } else {
+      it->second.merge(jobs);
+    }
+  }
+}
+
+template void CJobCodeForItem::AddJobCodeFromGroups(unsigned long, int, int, int, int, int, int, int, int, int, int, int);
+template void CJobCodeForItem::AddJobCodeFromGroups(unsigned long, int, int, int, int, int, int, int, int, int);
+template void CJobCodeForItem::AddJobCodeFromGroups(unsigned long, int, int, int, int, int, int, int);
+template void CJobCodeForItem::AddJobCodeFromGroups(unsigned long, int, int, int, int, int, int);
+template void CJobCodeForItem::AddJobCodeFromGroups(unsigned long, int, int, int, int, int);
+template void CJobCodeForItem::AddJobCodeFromGroups(unsigned long, int, int, int, int);
+template void CJobCodeForItem::AddJobCodeFromGroups(unsigned long, int, int, int);
+template void CJobCodeForItem::AddJobCodeFromGroups(unsigned long, int, int);
+template void CJobCodeForItem::AddJobCodeFromGroups(unsigned long, int);
+
+// OFFSET: 0x006C8A50
+// OFFSET: 0x006C8B10
+// OFFSET: 0x006C8BD0
+// OFFSET: 0x006C8CB0
+// OFFSET: 0x006C8D90
+// OFFSET: 0x006C8F60
+// OFFSET: 0x006C9050
+// FUNCTION: fn_06430
+// FUNCTION: fn_06431
+// FUNCTION: fn_06432
+// FUNCTION: fn_06433
+// FUNCTION: fn_06434
+// FUNCTION: fn_06435
+// FUNCTION: fn_06436
+template <typename... Jobs>
+void CJobCodeForItem::AddJobCode(unsigned long code, Jobs... jobs) {
+  std::set<int> jobSet = {jobs...};
+  if (!jobSet.empty()) {
+    auto it = this->m_jobCodes.find(code);
+    if (it == this->m_jobCodes.end()) {
+      this->m_jobCodes[code] = jobSet;
+    } else {
+      it->second.merge(jobSet);
+    }
+  }
+}
+
+template void CJobCodeForItem::AddJobCode(unsigned long, JobId, JobId, JobId, JobId, JobId, JobId, JobId, JobId);
+template void CJobCodeForItem::AddJobCode(unsigned long, JobId, JobId, JobId, JobId, JobId, JobId, JobId);
+template void CJobCodeForItem::AddJobCode(unsigned long, JobId, JobId, JobId, JobId, JobId);
+template void CJobCodeForItem::AddJobCode(unsigned long, JobId, JobId, JobId, JobId);
+template void CJobCodeForItem::AddJobCode(unsigned long, JobId, JobId, JobId);
+template void CJobCodeForItem::AddJobCode(unsigned long, JobId, JobId);
+template void CJobCodeForItem::AddJobCode(unsigned long, JobId);
+
+// OFFSET: 0x006C9270
+// OFFSET: 0x006C9350
+// OFFSET: 0x006C9430
+// OFFSET: 0x006C9510
+// OFFSET: 0x006C9600
+// OFFSET: 0x006C96F0
+// OFFSET: 0x006C98F0
+// OFFSET: 0x006C9A00
+// FUNCTION: fn_06437
+// FUNCTION: fn_06438
+// FUNCTION: fn_06439
+// FUNCTION: fn_06440
+// FUNCTION: fn_06441
+// FUNCTION: fn_06442
+// FUNCTION: fn_06443
+// FUNCTION: fn_06444
+template <typename... Jobs>
+void CJobCodeForItem::AddJobGroup(unsigned int group, Jobs... jobs) {
+  std::set<int> jobSet = {jobs...};
+  if (!jobSet.empty()) {
+    auto it = this->m_jobGroups.find(group);
+    if (it == this->m_jobGroups.end()) {
+      this->m_jobGroups[group] = jobSet;
+    } else {
+      it->second.merge(jobSet);
+    }
+  }
+}
+
+template void CJobCodeForItem::AddJobGroup(unsigned int, JobId, JobId, JobId, JobId, JobId, JobId, JobId, JobId, JobId, JobId, JobId, JobId, JobId, JobId,
+                                            JobId, JobId, JobId);
+template void CJobCodeForItem::AddJobGroup(unsigned int, JobId, JobId, JobId, JobId, JobId, JobId, JobId, JobId, JobId, JobId, JobId, JobId, JobId);
+template void CJobCodeForItem::AddJobGroup(unsigned int, JobId, JobId, JobId, JobId, JobId, JobId, JobId, JobId);
+template void CJobCodeForItem::AddJobGroup(unsigned int, JobId, JobId, JobId, JobId, JobId, JobId, JobId);
+template void CJobCodeForItem::AddJobGroup(unsigned int, JobId, JobId, JobId, JobId, JobId, JobId);
+template void CJobCodeForItem::AddJobGroup(unsigned int, JobId, JobId, JobId, JobId, JobId);
+template void CJobCodeForItem::AddJobGroup(unsigned int, JobId, JobId, JobId, JobId);
+template void CJobCodeForItem::AddJobGroup(unsigned int, JobId, JobId, JobId);
diff --git a/Source/Contents/JobCodeForItem.h b/Source/Contents/JobCodeForItem.h
new file mode 100644
index 00000000..70b6f08a
--- /dev/null
+++ b/Source/Contents/JobCodeForItem.h
@@ -0,0 +1,26 @@
+#ifndef RAGNAROK_SOURCE_CONTENTS_JOBCODEFORITEM_H
+#define RAGNAROK_SOURCE_CONTENTS_JOBCODEFORITEM_H
+
+#include "Utility/Singleton.h"
+
+#include <map>
+#include <set>
+
+class CJobCodeForItem : public Singleton<CJobCodeForItem> {
+public:
+  /* 0004 */ std::map<unsigned int, std::set<int>> m_jobGroups;
+  /* 000C */ std::map<unsigned long, std::set<int>> m_jobCodes;
+
+  template <typename... Groups>
+  void AddJobCodeFromGroups(unsigned long code, Groups... groups);
+  template <typename... Jobs>
+  void AddJobCode(unsigned long code, Jobs... jobs);
+  template <typename... Jobs>
+  void AddJobGroup(unsigned int group, Jobs... jobs);
+};
+
+#if defined(_WIN32) && !defined(_WIN64)
+static_assert(sizeof(CJobCodeForItem) == 0x14);
+#endif
+
+#endif
diff --git a/data/compile.json b/data/compile.json
index 9c870f91..8d78ccdd 100644
--- a/data/compile.json
+++ b/data/compile.json
@@ -478,6 +478,7 @@
   "Source/Contents/Items/ItemResources.cpp": 4,
   "Source/Contents/Items/RuneSystem.cpp": 4,
   "Source/Contents/Items/SelectPackageItemMgr.cpp": 4,
+  "Source/Contents/JobCodeForItem.cpp": 4,
   "Source/Contents/Jobs/JobInheritance.cpp": 4,
   "Source/Contents/Jobs/JobNameInitialization.cpp": 4,
   "Source/Contents/Jobs/JobNames.cpp": 4,