diff --git a/ydb/core/protos/config.proto b/ydb/core/protos/config.proto
index 88396c5f640b..b94896c0e80e 100644
--- a/ydb/core/protos/config.proto
+++ b/ydb/core/protos/config.proto
@@ -41,6 +41,7 @@ import "ydb/core/protos/nbs/blockstore.proto";
 import "ydb/library/actors/protos/interconnect.proto";
 import "yql/essentials/core/file_storage/proto/file_storage.proto";
 import "yql/essentials/providers/common/proto/gateways_config.proto";
+import "ydb/core/protos/s3_settings.proto";
 
 package NKikimrConfig;
 option java_package = "ru.yandex.kikimr.proto";
@@ -2141,6 +2142,7 @@ message TColumnShardConfig {
     optional uint64 BadPortionsLimit = 52;
     optional bool CombineChunksInResult = 54 [default = true];
     optional bool EnableParallelCompaction = 56 [default = true];
+    optional NKikimrSchemeOp.TS3Settings S3Client = 58;
 }
 
 message TSchemeShardConfig {
diff --git a/ydb/core/tx/tiering/manager.cpp b/ydb/core/tx/tiering/manager.cpp
index eaa43a2ff179..d51149f8e078 100644
--- a/ydb/core/tx/tiering/manager.cpp
+++ b/ydb/core/tx/tiering/manager.cpp
@@ -1,6 +1,8 @@
 #include "common.h"
 #include "manager.h"
 
+#include <ydb/core/base/appdata.h>
+#include <ydb/core/protos/config.pb.h>
 #include <ydb/core/tx/columnshard/columnshard_private_events.h>
 #include <ydb/core/tx/tiering/fetcher.h>
 #include <ydb/core/tx/tiering/tier/identifier.h>
@@ -78,11 +80,16 @@ class TTiersManager::TActor: public TActorBootstrapped<TTiersManager::TActor> {
         ResetRetryState(tierId);
         if (description.GetSelf().GetPathType() == NKikimrSchemeOp::EPathTypeExternalDataSource) {
             NTiers::TTierConfig tier;
+            if (HasAppData() && AppDataVerified().ColumnShardConfig.HasS3Client()) {
+                tier = NTiers::TTierConfig(AppDataVerified().ColumnShardConfig.GetS3Client());
+            }
+
             if (const auto status = tier.DeserializeFromProto(description.GetExternalDataSourceDescription()); status.IsFail()) {
                 AFL_WARN(NKikimrServices::TX_TIERING)("event", "fetched_invalid_tier_settings")("error", status.GetErrorMessage());
                 Owner->UpdateTierConfig(std::nullopt, tierId);
                 return;
             }
+
             Owner->UpdateTierConfig(tier, tierId);
         } else {
             AFL_WARN(NKikimrServices::TX_TIERING)("error", "invalid_object_type")("type", static_cast<ui64>(description.GetSelf().GetPathType()))("path", tierId.GetConfigPath());
diff --git a/ydb/core/tx/tiering/tier/object.h b/ydb/core/tx/tiering/tier/object.h
index cb8481c9b28e..3660032dda3f 100644
--- a/ydb/core/tx/tiering/tier/object.h
+++ b/ydb/core/tx/tiering/tier/object.h
@@ -26,6 +26,10 @@ class TTierConfig {
         , Compression(compression) {
     }
 
+    explicit TTierConfig(const TTierProto& config)
+        : ProtoConfig(config) {
+    }
+
     TConclusionStatus DeserializeFromProto(const NKikimrSchemeOp::TExternalDataSourceDescription& proto);
 
     NJson::TJsonValue SerializeConfigToJson() const;