diff --git a/src/JobsMedical.Web/Data/SeedData.cs b/src/JobsMedical.Web/Data/SeedData.cs
index 43ce754..d90d3c9 100644
--- a/src/JobsMedical.Web/Data/SeedData.cs
+++ b/src/JobsMedical.Web/Data/SeedData.cs
@@ -10,12 +10,42 @@ namespace JobsMedical.Web.Data;
 /// </summary>
 public static class SeedData
 {
+    /// <summary>Canonical role taxonomy (name, category, sort). Add new roles here; they're
+    /// inserted on every startup if missing, so existing DBs pick them up too.</summary>
+    private static readonly (string Name, string Category, int SortOrder)[] CanonicalRoles =
+    {
+        ("پزشک عمومی", "پزشک", 1),
+        ("پزشک متخصص", "پزشک", 2),
+        ("پرستار", "پرستار", 3),
+        ("ماما", "ماما", 4),
+        ("تکنسین اتاق عمل", "تکنسین", 5),
+        ("تکنسین فوریت‌های پزشکی", "تکنسین", 6),
+        ("کارشناس آزمایشگاه", "تکنسین", 7),
+        ("دندانپزشک", "دندانپزشک", 8),
+        ("پرستار سالمندان", "پرستار", 9),
+    };
+
     public static async Task EnsureSeededAsync(AppDbContext db, bool includeDemo = true)
     {
         await SeedReferenceAsync(db);
+        await EnsureRolesAsync(db);
         if (includeDemo) await SeedDemoAsync(db);
     }
 
+    /// <summary>Idempotently add any canonical role missing from the DB (no-op when all present).</summary>
+    public static async Task EnsureRolesAsync(AppDbContext db)
+    {
+        var existing = await db.Roles.Select(r => r.Name).ToListAsync();
+        var added = false;
+        foreach (var (name, category, sort) in CanonicalRoles)
+            if (!existing.Contains(name))
+            {
+                db.Roles.Add(new Role { Name = name, Category = category, SortOrder = sort, IsActive = true });
+                added = true;
+            }
+        if (added) await db.SaveChangesAsync();
+    }
+
     // ---------- Reference data (always) ----------
     public static async Task SeedReferenceAsync(AppDbContext db)
     {
@@ -29,14 +59,7 @@ public static class SeedData
             new City { Name = "شیراز", Province = "فارس", IsActive = false });
         await db.SaveChangesAsync();
 
-        db.Roles.AddRange(
-            new Role { Name = "پزشک عمومی", Category = "پزشک", SortOrder = 1 },
-            new Role { Name = "پزشک متخصص", Category = "پزشک", SortOrder = 2 },
-            new Role { Name = "پرستار", Category = "پرستار", SortOrder = 3 },
-            new Role { Name = "ماما", Category = "ماما", SortOrder = 4 },
-            new Role { Name = "تکنسین اتاق عمل", Category = "تکنسین", SortOrder = 5 },
-            new Role { Name = "تکنسین فوریت‌های پزشکی", Category = "تکنسین", SortOrder = 6 },
-            new Role { Name = "کارشناس آزمایشگاه", Category = "تکنسین", SortOrder = 7 });
+        // Roles are seeded by EnsureRolesAsync (idempotent, runs every startup).
 
         foreach (var n in new[] { "سعادت‌آباد", "شهرک غرب", "ولیعصر / پارک‌وی", "نارمک",
                                    "تهرانپارس", "گیشا / برج میلاد", "ونک", "تجریش" })
diff --git a/src/JobsMedical.Web/Program.cs b/src/JobsMedical.Web/Program.cs
index 586d0de..5367034 100644
--- a/src/JobsMedical.Web/Program.cs
+++ b/src/JobsMedical.Web/Program.cs
@@ -94,7 +94,8 @@ using (var scope = app.Services.CreateScope())
 {
     var db = scope.ServiceProvider.GetRequiredService<AppDbContext>();
     db.Database.Migrate();
-    await SeedData.SeedReferenceAsync(db);   // cities/roles/districts always
+    await SeedData.SeedReferenceAsync(db);   // cities/districts on first run
+    await SeedData.EnsureRolesAsync(db);     // add any missing roles (idempotent, existing DBs too)
     // Demo board in Development, or whenever the admin has turned Demo Mode on.
     var st = await scope.ServiceProvider
         .GetRequiredService<JobsMedical.Web.Services.Scraping.SettingsService>().GetAsync();