diff --git a/rustfs/src/admin/handlers/tier.rs b/rustfs/src/admin/handlers/tier.rs
index a36ba730b..4b1a01e48 100644
--- a/rustfs/src/admin/handlers/tier.rs
+++ b/rustfs/src/admin/handlers/tier.rs
@@ -18,6 +18,7 @@ use crate::{
         auth::validate_admin_request,
         router::{AdminOperation, Operation, S3Router},
     },
+    app::context::{default_tier_config_interface, get_global_app_context},
     auth::{check_key_valid, get_session_token},
     server::{ADMIN_PREFIX, RemoteAddr},
 };
@@ -27,7 +28,6 @@ use matchit::Params;
 use rustfs_config::MAX_ADMIN_REQUEST_BODY_SIZE;
 use rustfs_ecstore::{
     config::storageclass,
-    global::GLOBAL_TierConfigMgr,
     tier::{
         tier::{ERR_TIER_BACKEND_IN_USE, ERR_TIER_BACKEND_NOT_EMPTY, ERR_TIER_MISSING_CREDENTIALS},
         tier_admin::TierCreds,
@@ -45,9 +45,17 @@ use s3s::{
     s3_error,
 };
 use serde_urlencoded::from_bytes;
+use std::sync::Arc;
 use time::OffsetDateTime;
+use tokio::sync::RwLock;
 use tracing::{debug, warn};
 
+fn tier_config_mgr_from_context() -> Arc<RwLock<rustfs_ecstore::tier::tier::TierConfigMgr>> {
+    get_global_app_context()
+        .map(|context| context.tier_config().handle())
+        .unwrap_or_else(|| default_tier_config_interface().handle())
+}
+
 #[derive(Debug, Clone, serde::Deserialize, Default)]
 pub struct AddTierQuery {
     #[serde(rename = "accessKey")]
@@ -206,7 +214,8 @@ impl Operation for AddTier {
             &_ => (),
         }
 
-        let mut tier_config_mgr = GLOBAL_TierConfigMgr.write().await;
+        let tier_config_mgr_handle = tier_config_mgr_from_context();
+        let mut tier_config_mgr = tier_config_mgr_handle.write().await;
         //tier_config_mgr.reload(api);
         if let Err(err) = tier_config_mgr.add(args, force).await {
             return if err.code == ERR_TIER_ALREADY_EXISTS.code {
@@ -298,7 +307,8 @@ impl Operation for EditTier {
 
         let tier_name = params.get("tiername").map(|s| s.to_string()).unwrap_or_default();
 
-        let mut tier_config_mgr = GLOBAL_TierConfigMgr.write().await;
+        let tier_config_mgr_handle = tier_config_mgr_from_context();
+        let mut tier_config_mgr = tier_config_mgr_handle.write().await;
         //tier_config_mgr.reload(api);
         if let Err(err) = tier_config_mgr.edit(&tier_name, creds).await {
             return if err.code == ERR_TIER_NOT_FOUND.code {
@@ -365,7 +375,8 @@ impl Operation for ListTiers {
         )
         .await?;
 
-        let mut tier_config_mgr = GLOBAL_TierConfigMgr.read().await;
+        let tier_config_mgr_handle = tier_config_mgr_from_context();
+        let tier_config_mgr = tier_config_mgr_handle.read().await;
         let tiers = tier_config_mgr.list_tiers();
 
         let data = serde_json::to_vec(&tiers)
@@ -420,7 +431,8 @@ impl Operation for RemoveTier {
 
         let tier_name = params.get("tiername").map(|s| s.to_string()).unwrap_or_default();
 
-        let mut tier_config_mgr = GLOBAL_TierConfigMgr.write().await;
+        let tier_config_mgr_handle = tier_config_mgr_from_context();
+        let mut tier_config_mgr = tier_config_mgr_handle.write().await;
         //tier_config_mgr.reload(api);
         if let Err(err) = tier_config_mgr.remove(&tier_name, force).await {
             return if err.code == ERR_TIER_NOT_FOUND.code {
@@ -480,7 +492,8 @@ impl Operation for VerifyTier {
         )
         .await?;
 
-        let mut tier_config_mgr = GLOBAL_TierConfigMgr.write().await;
+        let tier_config_mgr_handle = tier_config_mgr_from_context();
+        let mut tier_config_mgr = tier_config_mgr_handle.write().await;
         tier_config_mgr.verify(&query.tier.unwrap()).await;
 
         let mut header = HeaderMap::new();
@@ -521,7 +534,8 @@ impl Operation for GetTierInfo {
             }
         };
 
-        let tier_config_mgr = GLOBAL_TierConfigMgr.read().await;
+        let tier_config_mgr_handle = tier_config_mgr_from_context();
+        let tier_config_mgr = tier_config_mgr_handle.read().await;
         let info = tier_config_mgr.get(&query.tier.unwrap());
 
         let data = serde_json::to_vec(&info)
@@ -587,7 +601,8 @@ impl Operation for ClearTier {
             return Err(s3_error!(InvalidRequest, "get rand failed"));
         };
 
-        let mut tier_config_mgr = GLOBAL_TierConfigMgr.write().await;
+        let tier_config_mgr_handle = tier_config_mgr_from_context();
+        let mut tier_config_mgr = tier_config_mgr_handle.write().await;
         //tier_config_mgr.reload(api);
         if let Err(err) = tier_config_mgr.clear_tier(force).await {
             warn!("tier_config_mgr clear failed, e: {:?}", err);
diff --git a/rustfs/src/app/context.rs b/rustfs/src/app/context.rs
index 5c3d0aa55..87a18e98f 100644
--- a/rustfs/src/app/context.rs
+++ b/rustfs/src/app/context.rs
@@ -23,6 +23,7 @@ use rustfs_ecstore::bucket::metadata_sys::{BucketMetadataSys, GLOBAL_BucketMetad
 use rustfs_ecstore::endpoints::EndpointServerPools;
 use rustfs_ecstore::global::get_global_region;
 use rustfs_ecstore::store::ECStore;
+use rustfs_ecstore::tier::tier::TierConfigMgr;
 use rustfs_iam::{store::object::ObjectStore, sys::IamSys};
 use rustfs_kms::KmsServiceManager;
 use rustfs_notify::{EventArgs, NotificationError, notifier_global};
@@ -71,6 +72,11 @@ pub trait RegionInterface: Send + Sync {
     fn get(&self) -> Option<String>;
 }
 
+/// Tier config interface for application-layer and admin handlers.
+pub trait TierConfigInterface: Send + Sync {
+    fn handle(&self) -> Arc<RwLock<TierConfigMgr>>;
+}
+
 /// Default IAM interface adapter.
 pub struct IamHandle {
     iam: Arc<IamSys<ObjectStore>>,
@@ -163,6 +169,16 @@ impl RegionInterface for RegionHandle {
     }
 }
 
+/// Default tier config interface adapter.
+#[derive(Default)]
+pub struct TierConfigHandle;
+
+impl TierConfigInterface for TierConfigHandle {
+    fn handle(&self) -> Arc<RwLock<TierConfigMgr>> {
+        rustfs_ecstore::global::GLOBAL_TierConfigMgr.clone()
+    }
+}
+
 /// Application-layer context with explicit dependencies.
 #[derive(Clone)]
 pub struct AppContext {
@@ -173,6 +189,7 @@ pub struct AppContext {
     bucket_metadata: Arc<dyn BucketMetadataInterface>,
     endpoints: Arc<dyn EndpointsInterface>,
     region: Arc<dyn RegionInterface>,
+    tier_config: Arc<dyn TierConfigInterface>,
 }
 
 impl AppContext {
@@ -185,6 +202,7 @@ impl AppContext {
             bucket_metadata: default_bucket_metadata_interface(),
             endpoints: default_endpoints_interface(),
             region: default_region_interface(),
+            tier_config: default_tier_config_interface(),
         }
     }
 
@@ -223,6 +241,10 @@ impl AppContext {
     pub fn region(&self) -> Arc<dyn RegionInterface> {
         self.region.clone()
     }
+
+    pub fn tier_config(&self) -> Arc<dyn TierConfigInterface> {
+        self.tier_config.clone()
+    }
 }
 
 pub fn default_notify_interface() -> Arc<dyn NotifyInterface> {
@@ -241,6 +263,10 @@ pub fn default_region_interface() -> Arc<dyn RegionInterface> {
     Arc::new(RegionHandle)
 }
 
+pub fn default_tier_config_interface() -> Arc<dyn TierConfigInterface> {
+    Arc::new(TierConfigHandle)
+}
+
 static GLOBAL_APP_CONTEXT: OnceLock<Arc<AppContext>> = OnceLock::new();
 
 /// Initialize global application context once and return the canonical instance.