diff --git a/adminfront/src/features/users/UserDetailPage.tsx b/adminfront/src/features/users/UserDetailPage.tsx
index 89f2d981..f191e72b 100644
--- a/adminfront/src/features/users/UserDetailPage.tsx
+++ b/adminfront/src/features/users/UserDetailPage.tsx
@@ -928,6 +928,16 @@ function UserDetailPage() {
                 <Mail size={14} className="text-primary/70" />
                 {user.email}
               </div>
+              {user.metadata?.secondary_emails &&
+                Array.isArray(user.metadata.secondary_emails) &&
+                user.metadata.secondary_emails.length > 0 && (
+                  <div className="flex items-center gap-1.5 bg-background px-2.5 py-1 rounded-full border">
+                    <Mail size={14} className="text-primary/40" />
+                    <span className="text-[10px] font-bold">
+                      +{user.metadata.secondary_emails.length}
+                    </span>
+                  </div>
+                )}
               {user.phone && (
                 <div className="flex items-center gap-1.5 bg-background px-2.5 py-1 rounded-full border">
                   <Shield size={14} className="text-primary/70" />
@@ -1048,6 +1058,49 @@ function UserDetailPage() {
                   </div>
                 </div>
 
+                {user.metadata?.secondary_emails &&
+                  Array.isArray(user.metadata.secondary_emails) &&
+                  user.metadata.secondary_emails.length > 0 && (
+                    <div className="grid gap-8 md:grid-cols-2 pt-6 border-t border-dashed">
+                      <div className="space-y-3 col-span-full">
+                        <Label className="text-xs font-bold uppercase text-muted-foreground flex items-center gap-2">
+                          <Mail size={14} />
+                          {t(
+                            "ui.admin.users.detail.form.secondary_emails",
+                            "보조 이메일",
+                          )}
+                          <Badge
+                            variant="secondary"
+                            className="text-[9px] h-4 px-1.5 font-bold"
+                          >
+                            {user.metadata.secondary_emails.length}
+                          </Badge>
+                        </Label>
+                        <div className="flex flex-wrap gap-2">
+                          {(user.metadata.secondary_emails as string[]).map(
+                            (email, idx) => (
+                              <div
+                                key={idx}
+                                className="flex items-center gap-2 px-3 py-1.5 rounded-xl border bg-muted/30 text-sm font-medium hover:border-primary/30 transition-colors"
+                              >
+                                <span className="text-primary/70">
+                                  <Mail size={12} />
+                                </span>
+                                {email}
+                              </div>
+                            ),
+                          )}
+                        </div>
+                        <p className="text-[10px] text-muted-foreground">
+                          {t(
+                            "msg.admin.users.detail.secondary_emails_help",
+                            "* 보조 이메일은 일괄 등록 또는 외부 연동을 통해 관리됩니다.",
+                          )}
+                        </p>
+                      </div>
+                    </div>
+                  )}
+
                 <div className="grid gap-8 md:grid-cols-2 pt-6 border-t border-dashed">
                   <div className="space-y-2">
                     <Label
diff --git a/adminfront/src/features/users/components/UserBulkUploadModal.tsx b/adminfront/src/features/users/components/UserBulkUploadModal.tsx
index 45506a10..a68a6f81 100644
--- a/adminfront/src/features/users/components/UserBulkUploadModal.tsx
+++ b/adminfront/src/features/users/components/UserBulkUploadModal.tsx
@@ -127,9 +127,9 @@ function hanmacEmailStatusClass(preview?: HanmacImportEmailPreview) {
 
 export const downloadUserTemplate = () => {
   const headers =
-    "email,name,phone,role,tenant_slug,department,grade,position,jobTitle,employee_id,tenant_slug1,department1,grade1,position1,jobTitle1,employee_id1";
+    "email,secondary_emails,name,phone,role,tenant_slug,department,grade,position,jobTitle,employee_id,tenant_slug1,department1,grade1,position1,jobTitle1,employee_id1";
   const example =
-    "user1@example.com,홍길동,010-1234-5678,user,tenant-slug,개발팀,수석,팀장,프론트엔드,EMP001,second-tenant,센터,책임,,Architecture,EMP002";
+    "user1@example.com,sub1@test.com;sub2@test.com,홍길동,010-1234-5678,user,tenant-slug,개발팀,수석,팀장,프론트엔드,EMP001,second-tenant,센터,책임,,Architecture,EMP002";
   const blob = new Blob([`${headers}\n${example}`], {
     type: "text/csv;charset=utf-8;",
   });