diff --git a/api/launchpad/launchpad_views.py b/api/launchpad/launchpad_views.py
index e709b4be..a7cbe916 100644
--- a/api/launchpad/launchpad_views.py
+++ b/api/launchpad/launchpad_views.py
@@ -1,6 +1,5 @@
-from django.db.models import Sum, Max, Prefetch, F, OuterRef, Subquery, Window, IntegerField
-from django.db.models.functions import RowNumber
-from django.db import connection
+from django.db.models import Sum, Max, Prefetch, F, OuterRef, Subquery, IntegerField
+
 from rest_framework.views import APIView
 
 from .serializers import LaunchpadLeaderBoardSerializer
@@ -48,11 +47,6 @@ def get(self, request):
             district_name=F("user_organization_link_user__org__district__name"),
             state=F("user_organization_link_user__org__district__zone__state__name"),
             time_=Max("karma_activity_log_user__created_at"),
-        ).annotate(
-            rank=Window(
-                expression=RowNumber(),
-                order_by=[F('karma').desc(), F('time_').asc()]
-            )
         ).order_by("-karma", "time_")
 
         paginated_queryset = CommonUtils.get_paginated_queryset(
diff --git a/api/launchpad/serializers.py b/api/launchpad/serializers.py
index 3455931b..1714d1e0 100644
--- a/api/launchpad/serializers.py
+++ b/api/launchpad/serializers.py
@@ -1,9 +1,15 @@
+from django.db.models import Sum, Max, Prefetch, F, OuterRef, Subquery, Window, IntegerField
+from django.db.models.functions import Rank
+
 from rest_framework import serializers
 
 from db.user import User
+from db.organization import UserOrganizationLink
+from db.task import KarmaActivityLog
+import json
 
 class LaunchpadLeaderBoardSerializer(serializers.ModelSerializer):
-    rank = serializers.IntegerField()
+    rank = serializers.SerializerMethodField()
     karma = serializers.IntegerField()
     org = serializers.CharField()
     district_name = serializers.CharField()
@@ -12,3 +18,47 @@ class LaunchpadLeaderBoardSerializer(serializers.ModelSerializer):
     class Meta:
         model = User
         fields = ("rank", "full_name", "karma", "org", "district_name", "state")
+
+    def get_rank(self, obj):
+        total_karma_subquery = KarmaActivityLog.objects.filter(
+            user=OuterRef('id'),
+            task__event='launchpad',
+            appraiser_approved=True,
+        ).values('user').annotate(
+            total_karma=Sum('karma')
+        ).values('total_karma')
+        allowed_org_types = ["College", "School", "Company"]
+
+        intro_task_completed_users = KarmaActivityLog.objects.filter(
+            task__event='launchpad',
+            appraiser_approved=True,
+            task__hashtag='#lp24-introduction',
+        ).values('user')
+        
+        users = User.objects.filter(
+            karma_activity_log_user__task__event="launchpad",
+            karma_activity_log_user__appraiser_approved=True,
+            id__in=intro_task_completed_users
+        ).prefetch_related(
+            Prefetch(
+                "user_organization_link_user",
+                queryset=UserOrganizationLink.objects.filter(org__org_type__in=allowed_org_types),
+            )
+        ).filter(
+            user_organization_link_user__id__in=UserOrganizationLink.objects.filter(
+                org__org_type__in=allowed_org_types
+            ).values("id")
+        ).annotate(
+            karma=Subquery(total_karma_subquery, output_field=IntegerField()),
+            time_=Max("karma_activity_log_user__created_at"),
+        ).order_by("-karma", "time_")
+        
+        # high complexity
+        rank = 0
+        for data in users:
+            rank += 1
+            if data.id == obj.id:
+                break    
+        
+        return rank
+