diff --git a/llama_stack/providers/remote/post_training/nvidia/post_training.py b/llama_stack/providers/remote/post_training/nvidia/post_training.py
index d3de930f7..900c58171 100644
--- a/llama_stack/providers/remote/post_training/nvidia/post_training.py
+++ b/llama_stack/providers/remote/post_training/nvidia/post_training.py
@@ -67,13 +67,18 @@ class NvidiaPostTrainingAdapter(ModelRegistryHelper):
         self.timeout = aiohttp.ClientTimeout(total=config.timeout)
         # TODO: filter by available models based on /config endpoint
         ModelRegistryHelper.__init__(self, model_entries=_MODEL_ENTRIES)
-        self.session = aiohttp.ClientSession(headers=self.headers, timeout=self.timeout)
-        self.customizer_url = config.customizer_url
+        self.session = None
 
+        self.customizer_url = config.customizer_url
         if not self.customizer_url:
             warnings.warn("Customizer URL is not set, using default value: http://nemo.test", stacklevel=2)
             self.customizer_url = "http://nemo.test"
 
+    async def _get_session(self) -> aiohttp.ClientSession:
+        if self.session is None or self.session.closed:
+            self.session = aiohttp.ClientSession(headers=self.headers, timeout=self.timeout)
+        return self.session
+
     async def _make_request(
         self,
         method: str,
@@ -94,8 +99,9 @@ class NvidiaPostTrainingAdapter(ModelRegistryHelper):
         if json and "Content-Type" not in request_headers:
             request_headers["Content-Type"] = "application/json"
 
+        session = await self._get_session()
         for _ in range(self.config.max_retries):
-            async with self.session.request(method, url, params=params, json=json, **kwargs) as response:
+            async with session.request(method, url, params=params, json=json, **kwargs) as response:
                 if response.status >= 400:
                     error_data = await response.json()
                     raise Exception(f"API request failed: {error_data}")
@@ -122,8 +128,8 @@ class NvidiaPostTrainingAdapter(ModelRegistryHelper):
         jobs = []
         for job in response.get("data", []):
             job_id = job.pop("id")
-            job_status = job.pop("status", "unknown").lower()
-            mapped_status = STATUS_MAPPING.get(job_status, "unknown")
+            job_status = job.pop("status", "scheduled").lower()
+            mapped_status = STATUS_MAPPING.get(job_status, "scheduled")
 
             # Convert string timestamps to datetime objects
             created_at = (
@@ -177,7 +183,7 @@ class NvidiaPostTrainingAdapter(ModelRegistryHelper):
         )
 
         api_status = response.pop("status").lower()
-        mapped_status = STATUS_MAPPING.get(api_status, "unknown")
+        mapped_status = STATUS_MAPPING.get(api_status, "scheduled")
 
         return NvidiaPostTrainingJobStatusResponse(
             status=JobStatus(mapped_status),
@@ -297,7 +303,7 @@ class NvidiaPostTrainingAdapter(ModelRegistryHelper):
             User is informed about unsupported parameters via warnings.
         """
         # Map model to nvidia model name
-        # ToDo: only supports llama-3.1-8b-instruct now, need to update this to support other models
+        # See `_MODEL_ENTRIES` for supported models
         nvidia_model = self.get_provider_model_id(model)
 
         # Check for unsupported method parameters
@@ -389,14 +395,17 @@ class NvidiaPostTrainingAdapter(ModelRegistryHelper):
 
         # Handle LoRA-specific configuration
         if algorithm_config:
-            if isinstance(algorithm_config, dict) and algorithm_config.get("type") == "LoRA":
-                warn_unsupported_params(algorithm_config, supported_params["lora_config"], "LoRA config")
+            algorithm_config_dict = (
+                algorithm_config.model_dump() if hasattr(algorithm_config, "model_dump") else algorithm_config
+            )
+            if isinstance(algorithm_config_dict, dict) and algorithm_config_dict.get("type") == "LoRA":
+                warn_unsupported_params(algorithm_config_dict, supported_params["lora_config"], "LoRA config")
                 job_config["hyperparameters"]["lora"] = {
                     k: v
                     for k, v in {
-                        "adapter_dim": algorithm_config.get("adapter_dim"),
-                        "alpha": algorithm_config.get("alpha"),
-                        "adapter_dropout": algorithm_config.get("adapter_dropout"),
+                        "adapter_dim": algorithm_config_dict.get("adapter_dim"),
+                        "alpha": algorithm_config_dict.get("alpha"),
+                        "adapter_dropout": algorithm_config_dict.get("adapter_dropout"),
                     }.items()
                     if v is not None
                 }