diff --git a/NEW/src/JdeScoping.DataSync/Etl/Destinations/DbBulkImportDestination.cs b/NEW/src/JdeScoping.DataSync/Etl/Destinations/DbBulkImportDestination.cs
index 1274ff0..45b7548 100644
--- a/NEW/src/JdeScoping.DataSync/Etl/Destinations/DbBulkImportDestination.cs
+++ b/NEW/src/JdeScoping.DataSync/Etl/Destinations/DbBulkImportDestination.cs
@@ -14,10 +14,12 @@ namespace JdeScoping.DataSync.Etl.Destinations;
 public class DbBulkImportDestination : IImportDestination
 {
     private const int DefaultBatchSize = 10000;
+    private const int DefaultCommandTimeoutSeconds = 600;
 
     private readonly IDbConnectionFactory _connectionFactory;
     private readonly string _tableName;
     private readonly int _batchSize;
+    private readonly int _commandTimeoutSeconds;
 
     /// <inheritdoc />
     public string DestinationName => $"BulkImport:{_tableName}";
@@ -28,10 +30,12 @@ public class DbBulkImportDestination : IImportDestination
     /// <param name="connectionFactory">Factory to create database connections.</param>
     /// <param name="tableName">Name of the destination table.</param>
     /// <param name="batchSize">Number of rows per batch. 0 uses the default (10000).</param>
+    /// <param name="commandTimeoutSeconds">Command timeout in seconds. 0 uses the default (600).</param>
     public DbBulkImportDestination(
         IDbConnectionFactory connectionFactory,
         string tableName,
-        int batchSize = 0)
+        int batchSize = 0,
+        int commandTimeoutSeconds = 0)
     {
         ArgumentNullException.ThrowIfNull(connectionFactory);
         ArgumentException.ThrowIfNullOrWhiteSpace(tableName);
@@ -39,6 +43,7 @@ public class DbBulkImportDestination : IImportDestination
         _connectionFactory = connectionFactory;
         _tableName = tableName;
         _batchSize = batchSize > 0 ? batchSize : DefaultBatchSize;
+        _commandTimeoutSeconds = commandTimeoutSeconds > 0 ? commandTimeoutSeconds : DefaultCommandTimeoutSeconds;
     }
 
     /// <inheritdoc />
@@ -58,6 +63,7 @@ public class DbBulkImportDestination : IImportDestination
         await using (var truncateCmd = connection.CreateCommand())
         {
             truncateCmd.CommandText = $"TRUNCATE TABLE [{_tableName}]";
+            truncateCmd.CommandTimeout = _commandTimeoutSeconds;
             await truncateCmd.ExecuteNonQueryAsync(cancellationToken);
         }
 
@@ -66,7 +72,7 @@ public class DbBulkImportDestination : IImportDestination
         {
             DestinationTableName = $"[{_tableName}]",
             BatchSize = _batchSize,
-            BulkCopyTimeout = 3600,
+            BulkCopyTimeout = _commandTimeoutSeconds,
             EnableStreaming = true
         };
 
diff --git a/NEW/src/JdeScoping.DataSync/Etl/Destinations/DbBulkMergeDestination.cs b/NEW/src/JdeScoping.DataSync/Etl/Destinations/DbBulkMergeDestination.cs
index c4a0984..9c79f54 100644
--- a/NEW/src/JdeScoping.DataSync/Etl/Destinations/DbBulkMergeDestination.cs
+++ b/NEW/src/JdeScoping.DataSync/Etl/Destinations/DbBulkMergeDestination.cs
@@ -16,12 +16,14 @@ namespace JdeScoping.DataSync.Etl.Destinations;
 public class DbBulkMergeDestination : IImportDestination
 {
     private const int DefaultBatchSize = 10000;
+    private const int DefaultCommandTimeoutSeconds = 600;
 
     private readonly IDbConnectionFactory _connectionFactory;
     private readonly string _tableName;
     private readonly string[] _matchColumns;
     private readonly string[]? _updateColumns;
     private readonly int _batchSize;
+    private readonly int _commandTimeoutSeconds;
 
     /// <inheritdoc />
     public string DestinationName => $"BulkMerge:{_tableName}";
@@ -34,12 +36,14 @@ public class DbBulkMergeDestination : IImportDestination
     /// <param name="matchColumns">Columns to match on for determining existing rows (key columns).</param>
     /// <param name="updateColumns">Columns to update when a row matches. If null, all non-match columns are updated.</param>
     /// <param name="batchSize">Number of rows per batch. 0 uses the default (10000).</param>
+    /// <param name="commandTimeoutSeconds">Command timeout in seconds. 0 uses the default (600).</param>
     public DbBulkMergeDestination(
         IDbConnectionFactory connectionFactory,
         string tableName,
         string[] matchColumns,
         string[]? updateColumns = null,
-        int batchSize = 0)
+        int batchSize = 0,
+        int commandTimeoutSeconds = 0)
     {
         ArgumentNullException.ThrowIfNull(connectionFactory);
         ArgumentException.ThrowIfNullOrWhiteSpace(tableName);
@@ -52,6 +56,7 @@ public class DbBulkMergeDestination : IImportDestination
         _matchColumns = matchColumns;
         _updateColumns = updateColumns;
         _batchSize = batchSize > 0 ? batchSize : DefaultBatchSize;
+        _commandTimeoutSeconds = commandTimeoutSeconds > 0 ? commandTimeoutSeconds : DefaultCommandTimeoutSeconds;
     }
 
     /// <inheritdoc />
@@ -128,6 +133,7 @@ public class DbBulkMergeDestination : IImportDestination
         var sql = $"SELECT TOP 0 * INTO {tempTableName} FROM [{_tableName}]";
         await using var cmd = connection.CreateCommand();
         cmd.CommandText = sql;
+        cmd.CommandTimeout = _commandTimeoutSeconds;
         await cmd.ExecuteNonQueryAsync(ct);
     }
 
@@ -138,6 +144,7 @@ public class DbBulkMergeDestination : IImportDestination
             var sql = $"IF OBJECT_ID('tempdb..{tempTableName}') IS NOT NULL DROP TABLE {tempTableName}";
             await using var cmd = connection.CreateCommand();
             cmd.CommandText = sql;
+            cmd.CommandTimeout = _commandTimeoutSeconds;
             await cmd.ExecuteNonQueryAsync();
         }
         catch
@@ -157,17 +164,20 @@ public class DbBulkMergeDestination : IImportDestination
         using var bulkCopy = new SqlBulkCopy(connection)
         {
             DestinationTableName = tempTableName,
-            BatchSize = batch.Rows.Count
+            BatchSize = batch.Rows.Count,
+            BulkCopyTimeout = _commandTimeoutSeconds
         };
         await bulkCopy.WriteToServerAsync(batch, ct);
 
         // Execute MERGE
         await using var cmd = connection.CreateCommand();
         cmd.CommandText = mergeSql;
+        cmd.CommandTimeout = _commandTimeoutSeconds;
         await cmd.ExecuteNonQueryAsync(ct);
 
         // Truncate temp table for next batch
         cmd.CommandText = $"TRUNCATE TABLE {tempTableName}";
+        cmd.CommandTimeout = _commandTimeoutSeconds;
         await cmd.ExecuteNonQueryAsync(ct);
     }
 
diff --git a/NEW/tests/JdeScoping.DataSync.Tests/Etl/Destinations/DbBulkImportDestinationTests.cs b/NEW/tests/JdeScoping.DataSync.Tests/Etl/Destinations/DbBulkImportDestinationTests.cs
index ab36f7b..b2514b0 100644
--- a/NEW/tests/JdeScoping.DataSync.Tests/Etl/Destinations/DbBulkImportDestinationTests.cs
+++ b/NEW/tests/JdeScoping.DataSync.Tests/Etl/Destinations/DbBulkImportDestinationTests.cs
@@ -44,4 +44,32 @@ public class DbBulkImportDestinationTests
         var dest = new DbBulkImportDestination(factory, "WorkOrder", batchSize: batchSize);
         Assert.NotNull(dest);
     }
+
+    [Fact]
+    public void Constructor_CustomTimeout_SetsTimeout()
+    {
+        // Arrange & Act
+        var factory = Substitute.For<IDbConnectionFactory>();
+        var dest = new DbBulkImportDestination(
+            factory,
+            "TestTable",
+            commandTimeoutSeconds: 1800);
+
+        // Assert - can't directly test private field, but constructor should accept it
+        Assert.NotNull(dest);
+    }
+
+    [Fact]
+    public void Constructor_ZeroTimeout_UsesDefault()
+    {
+        // Arrange & Act
+        var factory = Substitute.For<IDbConnectionFactory>();
+        var dest = new DbBulkImportDestination(
+            factory,
+            "TestTable",
+            commandTimeoutSeconds: 0);
+
+        // Assert
+        Assert.NotNull(dest);
+    }
 }
diff --git a/NEW/tests/JdeScoping.DataSync.Tests/Etl/Destinations/DbBulkMergeDestinationTests.cs b/NEW/tests/JdeScoping.DataSync.Tests/Etl/Destinations/DbBulkMergeDestinationTests.cs
index aea5813..03df554 100644
--- a/NEW/tests/JdeScoping.DataSync.Tests/Etl/Destinations/DbBulkMergeDestinationTests.cs
+++ b/NEW/tests/JdeScoping.DataSync.Tests/Etl/Destinations/DbBulkMergeDestinationTests.cs
@@ -62,4 +62,34 @@ public class DbBulkMergeDestinationTests
             updateColumns: new[] { "Status", "Description" });
         Assert.Equal("BulkMerge:WorkOrder", dest.DestinationName);
     }
+
+    [Fact]
+    public void Constructor_CustomTimeout_SetsTimeout()
+    {
+        // Arrange & Act
+        var factory = Substitute.For<IDbConnectionFactory>();
+        var dest = new DbBulkMergeDestination(
+            factory,
+            "TestTable",
+            new[] { "Id" },
+            commandTimeoutSeconds: 1800);
+
+        // Assert - can't directly test private field, but constructor should accept it
+        Assert.NotNull(dest);
+    }
+
+    [Fact]
+    public void Constructor_ZeroTimeout_UsesDefault()
+    {
+        // Arrange & Act
+        var factory = Substitute.For<IDbConnectionFactory>();
+        var dest = new DbBulkMergeDestination(
+            factory,
+            "TestTable",
+            new[] { "Id" },
+            commandTimeoutSeconds: 0);
+
+        // Assert
+        Assert.NotNull(dest);
+    }
 }