diff --git a/apps/cs/src/entities/organization/index.ts b/apps/cs/src/entities/organization/index.ts
index e04563805..7a064d06c 100644
--- a/apps/cs/src/entities/organization/index.ts
+++ b/apps/cs/src/entities/organization/index.ts
@@ -4,4 +4,4 @@ export {
   type OrganizationTree,
   type OrganizationFormData,
 } from "./model/organization-interface";
-export { generateOrganizationTreeData } from "./lib/utils";
+export { generateOrganizationTreeData, handleDropNode } from "./lib/utils";
diff --git a/apps/cs/src/entities/organization/lib/utils.ts b/apps/cs/src/entities/organization/lib/utils.ts
index d923fc35b..0022b44f1 100644
--- a/apps/cs/src/entities/organization/lib/utils.ts
+++ b/apps/cs/src/entities/organization/lib/utils.ts
@@ -1,4 +1,4 @@
-import type { NodeModel } from "@minoru/react-dnd-treeview";
+import type { DropOptions, NodeModel } from "@minoru/react-dnd-treeview";
 import type { OrganizationTree } from "../model/organization-interface";
 
 export const generateOrganizationTreeData = (
@@ -21,3 +21,57 @@ export const generateOrganizationTreeData = (
     return acc;
   }, []);
 };
+
+export const generateNewOrganizationTreeData = (
+  treeData: NodeModel<OrganizationTree>[],
+  options: DropOptions<OrganizationTree>,
+): OrganizationTree | null => {
+  const { dragSourceId, dragSource, dropTargetId } = options;
+
+  if (!dragSource?.data) return null;
+
+  const siblings = treeData.filter((node) => node.parent === dropTargetId);
+
+  const dragSourceIndex = siblings.findIndex(
+    (node) => node.id === dragSourceId,
+  );
+
+  const prevSibling = siblings[dragSourceIndex - 1];
+
+  const newSortSeq =
+    dragSourceIndex === 0 ? 1 : (prevSibling?.data?.sortSeq ?? 0) + 1;
+
+  const childNodes = treeData.filter(
+    (node) => node.parent === dragSourceId && node.data,
+  );
+
+  const treeNode: OrganizationTree = {
+    ...dragSource.data,
+    upOgnzSn: dropTargetId === 0 ? null : (dropTargetId as number),
+    sortSeq: newSortSeq,
+  };
+
+  const result: OrganizationTree = {
+    ...treeNode,
+    children:
+      childNodes?.map((child) => ({
+        ...child.data,
+        ognzNm: child.data?.ognzNm ?? "",
+        upOgnzSn: child.data?.upOgnzSn === 0 ? null : (dragSourceId as number),
+        sortSeq: child.data?.sortSeq ?? 1,
+      })) ?? [],
+  };
+
+  return result;
+};
+
+export const handleDropNode =
+  (callback: (newTree: OrganizationTree) => void) =>
+  (
+    newTree: NodeModel<OrganizationTree>[],
+    options: DropOptions<OrganizationTree>,
+  ) => {
+    const newTreeData = generateNewOrganizationTreeData(newTree, options);
+    if (!newTreeData) return;
+    callback(newTreeData);
+  };
diff --git a/apps/cs/src/entities/organization/model/organization-interface.ts b/apps/cs/src/entities/organization/model/organization-interface.ts
index 755bcd77f..0d25b0b09 100644
--- a/apps/cs/src/entities/organization/model/organization-interface.ts
+++ b/apps/cs/src/entities/organization/model/organization-interface.ts
@@ -16,7 +16,7 @@ export const organizationFormSchema = organizationSchema.omit({
 export type Organization = z.infer<typeof organizationSchema>;
 export type OrganizationFormData = z.infer<typeof organizationFormSchema>;
 export type OrganizationTree = Organization & {
-  children: OrganizationTree[];
+  children?: OrganizationTree[];
 };
 
 export interface OrganizationService {
diff --git a/apps/cs/src/pages/organization/ui/organization-page.tsx b/apps/cs/src/pages/organization/ui/organization-page.tsx
index 96fe6da61..4c8663f87 100644
--- a/apps/cs/src/pages/organization/ui/organization-page.tsx
+++ b/apps/cs/src/pages/organization/ui/organization-page.tsx
@@ -10,8 +10,9 @@ import { Button } from "@common/components/ui";
 import { DndTree, EditableNode } from "@/widgets/dnd-tree";
 import {
   OrganizationApi,
-  generateOrganizationTreeData,
   organizationFormSchema,
+  generateOrganizationTreeData,
+  handleDropNode,
   type OrganizationFormData,
   type OrganizationTree,
 } from "@/entities/organization";
@@ -198,7 +199,7 @@ function OrganizationPage() {
               />
             )}
             handleSelectNode={handleNodeSelect}
-            handleDropNode={() => {}}
+            handleDropNode={handleDropNode(console.log)}
             updateNodeName={async (id, name) => {
               await updateOrganizationName({ ognzSn: id as number, name });
             }}
diff --git a/apps/cs/src/widgets/dnd-tree/ui/custom-node.tsx b/apps/cs/src/widgets/dnd-tree/ui/custom-node.tsx
index ccd5ce75e..8e124be62 100644
--- a/apps/cs/src/widgets/dnd-tree/ui/custom-node.tsx
+++ b/apps/cs/src/widgets/dnd-tree/ui/custom-node.tsx
@@ -5,7 +5,7 @@ import { cn } from "@common/components/lib";
 import { EditableNode } from "./editable-node";
 
 interface TreeData extends Record<string, unknown> {
-  children: unknown[];
+  children?: unknown[];
 }
 
 type CustomNodeProps<T extends TreeData> = {
@@ -72,7 +72,7 @@ function CustomNode<T extends TreeData>({
       ) : (
         <>
           <div className="flex items-center" onClick={handleSelect}>
-            {data && data.children.length > 0 && (
+            {data && data.children && data.children.length > 0 && (
               <i
                 className={cn(
                   "diveicon di-arrow-forward mr-2 text-base text-label",
diff --git a/apps/cs/src/widgets/dnd-tree/ui/dnd-tree.tsx b/apps/cs/src/widgets/dnd-tree/ui/dnd-tree.tsx
index c2aab22c0..3453396da 100644
--- a/apps/cs/src/widgets/dnd-tree/ui/dnd-tree.tsx
+++ b/apps/cs/src/widgets/dnd-tree/ui/dnd-tree.tsx
@@ -15,7 +15,7 @@ import { cn } from "@common/components/lib";
 import { CustomNode } from "./custom-node";
 
 interface TreeData extends Record<string, unknown> {
-  children: unknown[];
+  children?: unknown[];
 }
 
 type EditableNodeProps = { depth: number };