diff --git a/src/components/common/Tab/FolderTab.tsx b/src/components/common/Tab/FolderTab.tsx
index 9c2754b..779ba5a 100644
--- a/src/components/common/Tab/FolderTab.tsx
+++ b/src/components/common/Tab/FolderTab.tsx
@@ -1,23 +1,37 @@
 import React from 'react';
+import BaseBadge from '../Tag/BaseBadge';
 
 type FolderTabProps = {
-  children: React.ReactNode;
+  TabTitle: React.ReactNode;
+  TabAlarm?: number;
   isActive?: boolean;
   className?: string;
   onClick?: () => void;
 };
 
-const FolderTab = ({ children, isActive = false, className="", onClick }: FolderTabProps) => {
+const FolderTab = ({
+  TabTitle,
+  TabAlarm,
+  isActive = false,
+  className = '',
+  onClick,
+}: FolderTabProps) => {
+  const badge =
+    TabAlarm && TabAlarm > 0 ? (
+      <BaseBadge size="lg">{TabAlarm > 99 ? '99+' : TabAlarm}</BaseBadge>
+    ) : null;
+
   return (
     <div
       className={`inline-flex h-[7rem] min-w-[10.6rem] flex-shrink-0 flex-wrap content-center items-center justify-center gap-[0.6rem] px-[3.2rem] py-0 text-body-16_M500 hover:text-black-130 ${
         isActive
-          ? 'rounded-tl-[12px] bg-black-10 rounded-tr-[12px] border border-solid border-l-black-50 border-r-black-50 border-t-black-50 border-b-black-10 text-black-130'
-          : ' text-black-70'
+          ? 'rounded-tl-[12px] rounded-tr-[12px] border border-solid border-b-black-10 border-l-black-50 border-r-black-50 border-t-black-50 bg-black-10 text-black-130'
+          : 'text-black-70'
       } ${className}`}
       onClick={onClick}
     >
-      {children}
+      <div>{TabTitle}</div>
+      {badge}
     </div>
   );
 };
diff --git a/src/components/common/Tab/FolderTabGroup.tsx b/src/components/common/Tab/FolderTabGroup.tsx
index d11ca42..da60e9f 100644
--- a/src/components/common/Tab/FolderTabGroup.tsx
+++ b/src/components/common/Tab/FolderTabGroup.tsx
@@ -4,6 +4,7 @@ import FolderTab from "./FolderTab";
 interface TabItem {
   id: string | number; 
   label: React.ReactNode;
+  alarm?: number;
   className?: string;
 }
 
@@ -32,9 +33,9 @@ export const FolderTabGroup: React.FC<FolderTabGroupProps> = ({
           isActive={idx === activeIndex}
           onClick={() => handleClick(idx)}
           className={`flex-1 basis-0 cursor-pointer ${tab.className ?? ""}`}
-        >
-          {tab.label}
-        </FolderTab>
+          TabTitle={tab.label}
+          TabAlarm={tab.alarm}
+        />
       ))}
     </div>
   );
diff --git a/src/constants/ProfilePostColumns.tsx b/src/constants/ProfilePostColumns.tsx
index 041b909..828806d 100644
--- a/src/constants/ProfilePostColumns.tsx
+++ b/src/constants/ProfilePostColumns.tsx
@@ -14,7 +14,6 @@ import EditIc from '../assets/icons/profile/ic_edit.svg?react';
 import TrashIc from '../assets/icons/profile/ic_trashcan.svg?react';
 import BaseTag from '../components/common/Tag/BaseTag';
 import ArrowIc from '../assets/icons/ic_arrow_down_large.svg?react';
-import BaseBadge from '../components/common/Tag/BaseBadge.tsx';
 
 export type PostRow = {
   id: string;
diff --git a/src/hooks/useApplicants.ts b/src/hooks/useApplicants.ts
index 5a3c8a3..c9cff5e 100644
--- a/src/hooks/useApplicants.ts
+++ b/src/hooks/useApplicants.ts
@@ -4,12 +4,15 @@ import {
   approveApplicant,
   rejectApplicant,
   UserProfile,
+  getMyApply,
+  postApply,
 } from '../api/applicants';
+import { useMutation, useQuery, useQueryClient } from '@tanstack/react-query';
 
 export function useApplicants(projectId?: number) {
   const [list, setList] = useState<UserProfile[]>([]);
   const [loading, setLoading] = useState(false);
-  const [error, setError]     = useState<string | null>(null);
+  const [error, setError] = useState<string | null>(null);
 
   const fetch = useCallback(async () => {
     if (projectId == null) return;
@@ -25,29 +28,63 @@ export function useApplicants(projectId?: number) {
     }
   }, [projectId]);
 
-  useEffect(() => { fetch(); }, [fetch]);
+  useEffect(() => {
+    fetch();
+  }, [fetch]);
 
-  const approve = useCallback(async (userId: string) => {
-    if (projectId == null) return;
-    setList(prev => prev.filter(u => u.id !== userId));
-    try {
-      await approveApplicant(projectId, userId);
-    } finally {
-      fetch();
-    }
-  }, [projectId, fetch]);
+  const approve = useCallback(
+    async (userId: string) => {
+      if (projectId == null) return;
+      setList((prev) => prev.filter((u) => u.id !== userId));
+      try {
+        await approveApplicant(projectId, userId);
+      } finally {
+        fetch();
+      }
+    },
+    [projectId, fetch],
+  );
 
-  const reject = useCallback(async (userId: string) => {
-    if (projectId == null) return;
-    setList(prev => prev.filter(u => u.id !== userId));
-    try {
-      await rejectApplicant(projectId, userId);
-    } finally {
-      fetch();
-    }
-  }, [projectId, fetch]);
+  const reject = useCallback(
+    async (userId: string) => {
+      if (projectId == null) return;
+      setList((prev) => prev.filter((u) => u.id !== userId));
+      try {
+        await rejectApplicant(projectId, userId);
+      } finally {
+        fetch();
+      }
+    },
+    [projectId, fetch],
+  );
 
   return { applicants: list, loading, error, refetch: fetch, approve, reject };
 }
 
 export default useApplicants;
+
+// 프로젝트 지원
+
+export const usePostApply = (projectId: number) => {
+  const queryClient = useQueryClient();
+  return useMutation({
+    mutationFn: (position: string) => postApply(projectId, position),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ['postApply', projectId] });
+    },
+    onError: (error) => {
+      console.error('Error Apply:', error);
+    },
+  });
+};
+
+// 내가 지원한 프로젝트 조회
+
+export const useGetMyApply = (status?: string) => {
+  return useQuery({
+    queryKey: ['getMyApply', status],
+    queryFn: () => getMyApply(status),
+    staleTime: 1000 * 60 * 5, // 5분 동안 캐시 유지
+    refetchOnWindowFocus: false, // 윈도우 포커스 시 재요청하지 않음
+  });
+};
diff --git a/src/pages/profile/ProfilePosts.tsx b/src/pages/profile/ProfilePosts.tsx
index 9839829..b476b25 100644
--- a/src/pages/profile/ProfilePosts.tsx
+++ b/src/pages/profile/ProfilePosts.tsx
@@ -127,7 +127,8 @@ export default function ProfilePosts() {
     [data, sortKey, searchText],
   );
 
-  const [baselines, setBaselines] = useState<Record<TabKey, number>>(loadBaselines());
+  const [baselines, setBaselines] =
+    useState<Record<TabKey, number>>(loadBaselines());
   const [totals, setTotals] = useState<Record<TabKey, number>>({
     postManagement: 0,
     applicantManagement: 0,
@@ -143,7 +144,9 @@ export default function ProfilePosts() {
   useEffect(() => {
     let alive = true;
     (async () => {
-      const ids = rows.map((r) => Number(r.id)).filter((n) => Number.isFinite(n));
+      const ids = rows
+        .map((r) => Number(r.id))
+        .filter((n) => Number.isFinite(n));
       if (ids.length === 0) {
         if (!alive) return;
         setTotals((prev) => ({ ...prev, memberManagement: 0 }));
@@ -177,9 +180,18 @@ export default function ProfilePosts() {
   }, [postsTotal, applicantsTotal]);
 
   const badgeCounts = {
-    postManagement: Math.max(0, totals.postManagement - baselines.postManagement),
-    applicantManagement: Math.max(0, totals.applicantManagement - baselines.applicantManagement),
-    memberManagement: Math.max(0, totals.memberManagement - baselines.memberManagement),
+    postManagement: Math.max(
+      0,
+      totals.postManagement - baselines.postManagement,
+    ),
+    applicantManagement: Math.max(
+      0,
+      totals.applicantManagement - baselines.applicantManagement,
+    ),
+    memberManagement: Math.max(
+      0,
+      totals.memberManagement - baselines.memberManagement,
+    ),
   };
 
   useEffect(() => {
@@ -193,18 +205,10 @@ export default function ProfilePosts() {
   const tabsWithBadges = useMemo(() => {
     return profilePostTabs.map((t) => {
       const key = t.key as TabKey;
-      const n = badgeCounts[key];
-      const badge =
-        n > 0 ? <BaseBadge size="lg">{n > 99 ? '99+' : n}</BaseBadge> : null;
-
       return {
         ...t,
-        label: (
-          <span className="flex items-center gap-[0.6rem]">
-            {t.label}
-            {badge}
-          </span>
-        ),
+        label: t.label,
+        alarm: badgeCounts[key],
       };
     });
   }, [badgeCounts]);
@@ -237,7 +241,8 @@ export default function ProfilePosts() {
       <FolderTabGroup
         tabs={tabsWithBadges.map((t) => ({
           id: t.key,
-          label: t.label,
+          label: <>{t.label}</>,
+          alarm: badgeCounts[t.key],
         }))}
         activeIndex={tabsWithBadges.findIndex((t) => t.key === activeKey)}
         onTabChange={(idx) => setActiveKey(tabsWithBadges[idx].key as TabKey)}