diff --git a/apps/establishment/filters.py b/apps/establishment/filters.py
index 3a7d3398..7ae5d13c 100644
--- a/apps/establishment/filters.py
+++ b/apps/establishment/filters.py
@@ -1,7 +1,8 @@
 """Establishment app filters."""
 from django.core.validators import EMPTY_VALUES
 from django.utils.translation import ugettext_lazy as _
-from django_filters import rest_framework as filters
+from django_filters import rest_framework as filters, Filter
+from django_filters.fields import Lookup
 from rest_framework.serializers import ValidationError
 
 from establishment import models
@@ -63,13 +64,19 @@ class EstablishmentTypeTagFilter(filters.FilterSet):
         )
 
 
+class ListFilter(Filter):
+    def filter(self, qs, value):
+        value_list = value.split(u',')
+        return super().filter(qs, Lookup(value_list, 'in'))
+
+
 class EmployeeBackFilter(filters.FilterSet):
     """Employee filter set."""
 
     search = filters.CharFilter(method='search_by_name_or_last_name')
-    position_id = filters.NumberFilter(method='search_by_actual_position_id')
-    public_mark = filters.NumberFilter(method='search_by_public_mark')
-    toque_number = filters.NumberFilter(method='search_by_toque_number')
+    position_id = filters.CharFilter(method='search_by_actual_position_id')
+    public_mark = filters.CharFilter(method='search_by_public_mark')
+    toque_number = filters.CharFilter(method='search_by_toque_number')
     username = filters.CharFilter(method='search_by_username_or_name')
 
     class Meta:
@@ -93,19 +100,22 @@ class EmployeeBackFilter(filters.FilterSet):
     def search_by_actual_position_id(self, queryset, name, value):
         """Search by actual position_id."""
         if value not in EMPTY_VALUES:
-            return queryset.search_by_position_id(value)
+            value_list = [int(val) for val in value.split(',')]
+            return queryset.search_by_position_id(value_list)
         return queryset
 
     def search_by_public_mark(self, queryset, name, value):
         """Search by establishment public_mark."""
         if value not in EMPTY_VALUES:
-            return queryset.search_by_public_mark(value)
+            value_list = [int(val) for val in value.split(',')]
+            return queryset.search_by_public_mark(value_list)
         return queryset
 
     def search_by_toque_number(self, queryset, name, value):
         """Search by establishment toque_number."""
         if value not in EMPTY_VALUES:
-            return queryset.search_by_toque_number(value)
+            value_list = [int(val) for val in value.split(',')]
+            return queryset.search_by_toque_number(value_list)
         return queryset
 
     def search_by_username_or_name(self, queryset, name, value):
diff --git a/apps/establishment/models.py b/apps/establishment/models.py
index f2c7e2ee..edbafdc7 100644
--- a/apps/establishment/models.py
+++ b/apps/establishment/models.py
@@ -1034,22 +1034,22 @@ class EmployeeQuerySet(models.QuerySet):
             Q(establishmentemployee__to_date__isnull=True)
         )
 
-    def search_by_position_id(self, value):
+    def search_by_position_id(self, value_list):
         """Search by position_id."""
-        return self.filter(
-            Q(establishmentemployee__position_id=value),
+        return self.search_by_actual_employee().filter(
+            Q(establishmentemployee__position_id__in=value_list),
         )
 
-    def search_by_public_mark(self, value):
+    def search_by_public_mark(self, value_list):
         """Search by establishment public_mark."""
-        return self.filter(
-            Q(establishmentemployee__establishment__public_mark=value),
+        return self.search_by_actual_employee().filter(
+            Q(establishmentemployee__establishment__public_mark__in=value_list),
         )
 
-    def search_by_toque_number(self, value):
+    def search_by_toque_number(self, value_list):
         """Search by establishment toque_number."""
-        return self.filter(
-            Q(establishmentemployee__establishment__toque_number=value),
+        return self.search_by_actual_employee().filter(
+            Q(establishmentemployee__establishment__toque_number__in=value_list),
         )
 
     def search_by_username_or_name(self, value):
diff --git a/apps/establishment/views/back.py b/apps/establishment/views/back.py
index 4bbf9533..04ba6581 100644
--- a/apps/establishment/views/back.py
+++ b/apps/establishment/views/back.py
@@ -187,7 +187,7 @@ class EmployeeListCreateView(generics.ListCreateAPIView):
     permission_classes = (permissions.AllowAny,)
     filter_class = filters.EmployeeBackFilter
     serializer_class = serializers.EmployeeBackSerializers
-    queryset = models.Employee.objects.all().with_back_office_related()
+    queryset = models.Employee.objects.all().distinct().with_back_office_related()
 
 
 class EmployeesListSearchViews(generics.ListAPIView):