diff --git a/common/config/eive/objects.h b/common/config/eive/objects.h
index 5b9ec8a0..b410c8a3 100644
--- a/common/config/eive/objects.h
+++ b/common/config/eive/objects.h
@@ -128,9 +128,10 @@ enum commonObjects : uint32_t {
   TCS_BOARD_ASS = 0x73000003,
   RW_ASS = 0x73000004,
   CAM_SWITCHER = 0x73000006,
+  EIVE_SYSTEM = 0x73010000,
   ACS_SUBSYSTEM = 0x73010001,
   PL_SUBSYSTEM = 0x73010002,
-  EIVE_SYSTEM = 0x73010000,
+  TCS_SUBSYSTEM = 0x73010003,
   TM_FUNNEL = 0x73000100,
   PUS_TM_FUNNEL = 0x73000101,
   CFDP_TM_FUNNEL = 0x73000102,
diff --git a/mission/system/tree/CMakeLists.txt b/mission/system/tree/CMakeLists.txt
index 6e7f1619..30bcfcb9 100644
--- a/mission/system/tree/CMakeLists.txt
+++ b/mission/system/tree/CMakeLists.txt
@@ -1,2 +1,2 @@
-target_sources(${LIB_EIVE_MISSION} PRIVATE acsModeTree.cpp payloadModeTree.cpp
+target_sources(${LIB_EIVE_MISSION} PRIVATE acsModeTree.cpp payloadModeTree.cpp tcsModeTree.cpp
                                            system.cpp util.cpp)
diff --git a/mission/system/tree/tcsModeTree.cpp b/mission/system/tree/tcsModeTree.cpp
new file mode 100644
index 00000000..a6f2ba37
--- /dev/null
+++ b/mission/system/tree/tcsModeTree.cpp
@@ -0,0 +1,12 @@
+#include "tcsModeTree.h"
+
+#include "fsfw/subsystem/Subsystem.h"
+#include "mission/system/tree/util.h"
+#include "eive/objects.h"
+
+Subsystem satsystem::tcs::SUBSYSTEM(objects::TCS_SUBSYSTEM, 12, 24);
+
+namespace {
+// Alias for checker function
+const auto check = subsystem::checkInsert;
+}
diff --git a/mission/system/tree/tcsModeTree.h b/mission/system/tree/tcsModeTree.h
new file mode 100644
index 00000000..f223e87b
--- /dev/null
+++ b/mission/system/tree/tcsModeTree.h
@@ -0,0 +1,15 @@
+#ifndef MISSION_SYSTEM_TREE_TCSMODETREE_H_
+#define MISSION_SYSTEM_TREE_TCSMODETREE_H_
+
+class Subsystem;
+
+namespace satsystem {
+namespace tcs {
+
+extern Subsystem SUBSYSTEM;
+void init();
+
+}  // namespace tcs
+}  // namespace satsystem
+
+#endif /* MISSION_SYSTEM_TREE_TCSMODETREE_H_ */