diff --git a/infrastructure/global/stacksets/inf-org-crossaccount/test-cross-org.py b/infrastructure/global/stacksets/inf-org-crossaccount/test-cross-org.py
new file mode 100755
index 00000000..3c58e3da
--- /dev/null
+++ b/infrastructure/global/stacksets/inf-org-crossaccount/test-cross-org.py
@@ -0,0 +1,145 @@
+import boto3
+import argparse
+import os
+import sys
+import logging
+import time
+from botocore.exceptions import ClientError, ProfileNotFound
+
+# --- VERSIONING ---
+__version__ = "1.0.17"
+
+def get_args():
+    parser = argparse.ArgumentParser(description=f"AWS Org Connectivity Test v{__version__}")
+    parser.add_argument("--profile", default=os.environ.get("AWS_PROFILE"), help="AWS CLI profile")
+    parser.add_argument("--region", default=os.environ.get("AWS_DEFAULT_REGION", "us-east-1"), help="AWS Region")
+    parser.add_argument("--role-name", required=True, help="Role name to assume in member accounts")
+    parser.add_argument("--sort", choices=['id', 'name'], default='name', help="Field to sort results by")
+    parser.add_argument("--debug", action="store_true", help="Enable verbose wire-trace logging")
+    return parser.parse_args()
+
+def get_full_path(org_client, entity_id, cache):
+    """Resolves hierarchy path and caches results. Strips 'Root'."""
+    if entity_id in cache:
+        return cache[entity_id]
+
+    if entity_id.startswith('r-'):
+        cache[entity_id] = (None, entity_id)
+        return None, entity_id
+
+    try:
+        parent_resp = org_client.list_parents(ChildId=entity_id)
+        parents = parent_resp.get('Parents', [])
+        if not parents:
+            return "Unknown", entity_id
+
+        parent_id = parents[0]['Id']
+        ou_desc = org_client.describe_organizational_unit(OrganizationalUnitId=entity_id)
+        ou_name = ou_desc['OrganizationalUnit']['Name']
+
+        parent_path, _ = get_full_path(org_client, parent_id, cache)
+        full_path = f"{parent_path}:{ou_name}" if parent_path else ou_name
+        
+        cache[entity_id] = (full_path, entity_id)
+        return full_path, entity_id
+    except Exception:
+        return f"Error({entity_id})", entity_id
+
+def test_connectivity(args):
+    # Start high-precision timer
+    start_time = time.perf_counter()
+
+    if args.debug:
+        boto3.set_stream_logger(name='botocore', level=logging.DEBUG)
+
+    try:
+        session = boto3.Session(profile_name=args.profile, region_name=args.region)
+        sts_client = session.client('sts')
+        org_client = session.client('organizations')
+        
+        caller = sts_client.get_caller_identity()
+        partition = caller['Arn'].split(':')[1]
+        
+        print("Gathering Organization accounts and hierarchy...")
+        all_accounts = []
+        paginator = org_client.get_paginator('list_accounts')
+        for page in paginator.paginate():
+            all_accounts.extend([acc for acc in page['Accounts'] if acc['Status'] == 'ACTIVE'])
+        
+        sort_key = 'Name' if args.sort == 'name' else 'Id'
+        all_accounts.sort(key=lambda x: x[sort_key].lower())
+
+        table_width = 215
+        print("-" * table_width)
+        print(f"AWS ORG CONNECTIVITY TEST - v{__version__} | Total Accounts: {len(all_accounts)}")
+        print("-" * table_width)
+        print(f"{'#':<4} | {'Account Name':<25} | {'Alias':<64} | {'Account ID':<15} | {'Status':<12} | {'Full OU Path'}")
+        print("-" * table_width)
+
+        hierarchy_cache = {} 
+        ou_summary = {} 
+        
+        for i, acc in enumerate(all_accounts, 1):
+            acc_id = acc['Id']
+            acc_name = acc['Name']
+            role_arn = f"arn:{partition}:iam::{acc_id}:role/{args.role_name}"
+            
+            parent_resp = org_client.list_parents(ChildId=acc_id)
+            parents = parent_resp.get('Parents', [])
+            
+            if parents:
+                parent_id = parents[0]['Id']
+                raw_path, ou_id = get_full_path(org_client, parent_id, hierarchy_cache)
+                ou_path = raw_path if raw_path else "N/A (Root)"
+            else:
+                ou_path = "Orphaned"
+                ou_id = "N/A"
+
+            summary_key = (ou_path, ou_id)
+            if summary_key not in ou_summary:
+                ou_summary[summary_key] = {"success": 0, "fail": 0}
+
+            alias = "None"
+            status_text = "PENDING"
+
+            try:
+                assumed = sts_client.assume_role(RoleArn=role_arn, RoleSessionName="ConnTest")
+                creds = assumed['Credentials']
+                m_sess = boto3.Session(
+                    aws_access_key_id=creds['AccessKeyId'],
+                    aws_secret_access_key=creds['SecretAccessKey'],
+                    aws_session_token=creds['SessionToken'],
+                    region_name=session.region_name
+                )
+                aliases = m_sess.client('iam').list_account_aliases().get('AccountAliases', [])
+                if aliases:
+                    alias = aliases[0]
+                status_text = "SUCCESS"
+                ou_summary[summary_key]["success"] += 1
+            except ClientError as e:
+                status_text = f"FAIL({e.response['Error']['Code']})"
+                ou_summary[summary_key]["fail"] += 1
+
+            print(f"{i:<4} | {acc_name[:25]:<25} | {alias:<64} | {acc_id:<15} | {status_text:<12} | {ou_path}")
+
+        # Stop timer
+        end_time = time.perf_counter()
+        elapsed_seconds = end_time - start_time
+        minutes, seconds = divmod(int(elapsed_seconds), 60)
+
+        # Output Summary with Elapsed Time
+        print("\n" + "=" * 85)
+        print(f"{'OU PATH SUMMARY':<45} | {'OU ID':<18} | {'SUCC':<6} | {'FAIL':<6}")
+        print("=" * 85)
+        for (path, ou_id), counts in sorted(ou_summary.items(), key=lambda x: x[0][0] if x[0][0] else ""):
+            print(f"{path[:45]:<45} | {ou_id:<18} | {counts['success']:<6} | {counts['fail']:<6}")
+        print("=" * 85)
+        print(f"Total Elapsed Time: {minutes}m {seconds}s")
+        print("=" * 85)
+
+    except Exception as e:
+        print(f"CRITICAL ERROR: {e}")
+
+if __name__ == "__main__":
+    test_connectivity(get_args())
+