diff --git a/src/Server/ZB.MOM.WW.OtOpcUa.Runtime/Drivers/DriverHostActor.cs b/src/Server/ZB.MOM.WW.OtOpcUa.Runtime/Drivers/DriverHostActor.cs
index 462e7b65..6c8a1aea 100644
--- a/src/Server/ZB.MOM.WW.OtOpcUa.Runtime/Drivers/DriverHostActor.cs
+++ b/src/Server/ZB.MOM.WW.OtOpcUa.Runtime/Drivers/DriverHostActor.cs
@@ -21,6 +21,7 @@ using ZB.MOM.WW.OtOpcUa.Configuration.Enums;
 using ZB.MOM.WW.OtOpcUa.Core.Abstractions;
 using ZB.MOM.WW.OtOpcUa.Core.ScriptedAlarms;
 using ZB.MOM.WW.OtOpcUa.Core.Scripting;
+using ZB.MOM.WW.OtOpcUa.Core.VirtualTags;
 using ZB.MOM.WW.OtOpcUa.OpcUaServer;
 using ZB.MOM.WW.OtOpcUa.Runtime.ScriptedAlarms;
 using ZB.MOM.WW.OtOpcUa.Runtime.VirtualTags;
@@ -65,6 +66,7 @@ public sealed class DriverHostActor : ReceiveActor, IWithTimers
     private readonly IActorRef? _opcUaPublishActor;
     private readonly IDriverHealthPublisher _healthPublisher;
     private readonly IVirtualTagEvaluator _virtualTagEvaluator;
+    private readonly IHistoryWriter _historyWriter;
     private readonly IActorRef? _virtualTagHostOverride;
     private readonly ILoggerFactory _loggerFactory;
     private readonly ScriptRootLogger? _scriptRootLogger;
@@ -196,6 +198,10 @@ public sealed class DriverHostActor : ReceiveActor, IWithTimers
     /// <see cref="VirtualTagHostActor"/>'s children; defaults to <see cref="NullVirtualTagEvaluator"/>
     /// (the dev/Mac path where no expression is evaluated). Production passes the DI-resolved
     /// Roslyn evaluator.</param>
+    /// <param name="historyWriter">Optional sink handed to the spawned <see cref="VirtualTagHostActor"/>
+    /// for VirtualTag results whose plan opted into <c>Historize=true</c>; defaults to
+    /// <see cref="NullHistoryWriter"/> (the durable AVEVA sink is infra-gated, so no live-data historian
+    /// write RPC exists). A deployment that binds a real <see cref="IHistoryWriter"/> in DI overrides it.</param>
     /// <param name="virtualTagHostOverride">Test seam: when supplied, this actor is used as the
     /// VirtualTag host instead of spawning a real <see cref="VirtualTagHostActor"/> child, so tests
     /// can intercept the <see cref="VirtualTagHostActor.ApplyVirtualTags"/> message. Null in
@@ -220,13 +226,14 @@ public sealed class DriverHostActor : ReceiveActor, IWithTimers
         IActorRef? opcUaPublishActor = null,
         IDriverHealthPublisher? healthPublisher = null,
         IVirtualTagEvaluator? virtualTagEvaluator = null,
+        IHistoryWriter? historyWriter = null,
         IActorRef? virtualTagHostOverride = null,
         ILoggerFactory? loggerFactory = null,
         ScriptRootLogger? scriptRootLogger = null,
         IActorRef? scriptedAlarmHostOverride = null) =>
         Akka.Actor.Props.Create(() => new DriverHostActor(
             dbFactory, localNode, coordinator, driverFactory, localRoles, dependencyMux, opcUaPublishActor,
-            healthPublisher, virtualTagEvaluator, virtualTagHostOverride,
+            healthPublisher, virtualTagEvaluator, historyWriter, virtualTagHostOverride,
             loggerFactory, scriptRootLogger, scriptedAlarmHostOverride));
 
     /// <summary>Initializes a new DriverHostActor with the specified dependencies.</summary>
@@ -240,6 +247,8 @@ public sealed class DriverHostActor : ReceiveActor, IWithTimers
     /// <param name="healthPublisher">Optional driver-health publisher; defaults to <see cref="NullDriverHealthPublisher"/>.</param>
     /// <param name="virtualTagEvaluator">Optional evaluator handed to the VirtualTag host's children;
     /// defaults to <see cref="NullVirtualTagEvaluator"/>.</param>
+    /// <param name="historyWriter">Optional sink handed to the spawned <see cref="VirtualTagHostActor"/>
+    /// for historized VirtualTag results; defaults to <see cref="NullHistoryWriter"/>.</param>
     /// <param name="virtualTagHostOverride">Test seam: when supplied, used as the VirtualTag host
     /// instead of spawning a real <see cref="VirtualTagHostActor"/> child.</param>
     /// <param name="loggerFactory">Optional logger factory used to create the
@@ -258,6 +267,7 @@ public sealed class DriverHostActor : ReceiveActor, IWithTimers
         IActorRef? opcUaPublishActor = null,
         IDriverHealthPublisher? healthPublisher = null,
         IVirtualTagEvaluator? virtualTagEvaluator = null,
+        IHistoryWriter? historyWriter = null,
         IActorRef? virtualTagHostOverride = null,
         ILoggerFactory? loggerFactory = null,
         ScriptRootLogger? scriptRootLogger = null,
@@ -272,6 +282,7 @@ public sealed class DriverHostActor : ReceiveActor, IWithTimers
         _opcUaPublishActor = opcUaPublishActor;
         _healthPublisher = healthPublisher ?? NullDriverHealthPublisher.Instance;
         _virtualTagEvaluator = virtualTagEvaluator ?? NullVirtualTagEvaluator.Instance;
+        _historyWriter = historyWriter ?? NullHistoryWriter.Instance;
         _virtualTagHostOverride = virtualTagHostOverride;
         _loggerFactory = loggerFactory ?? NullLoggerFactory.Instance;
         _scriptRootLogger = scriptRootLogger;
@@ -329,7 +340,7 @@ public sealed class DriverHostActor : ReceiveActor, IWithTimers
         }
 
         _virtualTagHost = Context.ActorOf(
-            VirtualTagHostActor.Props(_opcUaPublishActor, _dependencyMux, _virtualTagEvaluator),
+            VirtualTagHostActor.Props(_opcUaPublishActor, _dependencyMux, _virtualTagEvaluator, _historyWriter),
             "virtual-tag-host");
     }
 
diff --git a/src/Server/ZB.MOM.WW.OtOpcUa.Runtime/ServiceCollectionExtensions.cs b/src/Server/ZB.MOM.WW.OtOpcUa.Runtime/ServiceCollectionExtensions.cs
index c6aa75c6..dea78446 100644
--- a/src/Server/ZB.MOM.WW.OtOpcUa.Runtime/ServiceCollectionExtensions.cs
+++ b/src/Server/ZB.MOM.WW.OtOpcUa.Runtime/ServiceCollectionExtensions.cs
@@ -13,6 +13,7 @@ using ZB.MOM.WW.OtOpcUa.Configuration;
 using ZB.MOM.WW.OtOpcUa.Core.Abstractions;
 using ZB.MOM.WW.OtOpcUa.Core.AlarmHistorian;
 using ZB.MOM.WW.OtOpcUa.Core.Scripting;
+using ZB.MOM.WW.OtOpcUa.Core.VirtualTags;
 using ZB.MOM.WW.OtOpcUa.OpcUaServer;
 using ZB.MOM.WW.OtOpcUa.Runtime.Drivers;
 using ZB.MOM.WW.OtOpcUa.Runtime.Health;
@@ -43,6 +44,10 @@ public static class ServiceCollectionExtensions
     {
         services.TryAddSingleton<IAlarmHistorianSink>(NullAlarmHistorianSink.Instance);
         services.TryAddSingleton<IHistorianDataSource>(NullHistorianDataSource.Instance);
+        // VirtualTag historization sink. Null default — the durable AVEVA sink is infra-gated (there is
+        // no live-data historian write RPC). TryAddSingleton so a deployment that bound a real
+        // IHistoryWriter earlier wins.
+        services.TryAddSingleton<IHistoryWriter>(NullHistoryWriter.Instance);
         services.TryAddSingleton<IDriverFactory>(NullDriverFactory.Instance);
         services.TryAddSingleton<IOpcUaAddressSpaceSink>(NullOpcUaAddressSpaceSink.Instance);
         services.TryAddSingleton<IServiceLevelPublisher>(NullServiceLevelPublisher.Instance);
@@ -184,6 +189,10 @@ public static class ServiceCollectionExtensions
                 virtualTagEvaluator = NullVirtualTagEvaluator.Instance;
             }
 
+            // VirtualTag historization sink threaded to the spawned VirtualTagHostActor. Null default
+            // (durable AVEVA sink is infra-gated); a deployment binding a real IHistoryWriter overrides.
+            var historyWriter = resolver.GetService<IHistoryWriter>() ?? NullHistoryWriter.Instance;
+
             var dbHealth = system.ActorOf(
                 DbHealthProbeActor.Props(dbFactory),
                 DbHealthProbeActorName);
@@ -215,6 +224,7 @@ public static class ServiceCollectionExtensions
                     opcUaPublishActor: publishActor,
                     healthPublisher: healthPublisher,
                     virtualTagEvaluator: virtualTagEvaluator,
+                    historyWriter: historyWriter,
                     loggerFactory: loggerFactory,
                     scriptRootLogger: scriptRootLogger),
                 DriverHostActorName);
diff --git a/tests/Server/ZB.MOM.WW.OtOpcUa.Runtime.Tests/Drivers/DriverHostActorHistoryWriterTests.cs b/tests/Server/ZB.MOM.WW.OtOpcUa.Runtime.Tests/Drivers/DriverHostActorHistoryWriterTests.cs
new file mode 100644
index 00000000..76869edd
--- /dev/null
+++ b/tests/Server/ZB.MOM.WW.OtOpcUa.Runtime.Tests/Drivers/DriverHostActorHistoryWriterTests.cs
@@ -0,0 +1,127 @@
+using System.Collections.Concurrent;
+using System.Text.Json;
+using Akka.Actor;
+using Microsoft.EntityFrameworkCore;
+using Shouldly;
+using Xunit;
+using ZB.MOM.WW.OtOpcUa.Commons.Engines;
+using ZB.MOM.WW.OtOpcUa.Commons.Messages.Deploy;
+using ZB.MOM.WW.OtOpcUa.Commons.Types;
+using ZB.MOM.WW.OtOpcUa.Configuration;
+using ZB.MOM.WW.OtOpcUa.Configuration.Entities;
+using ZB.MOM.WW.OtOpcUa.Configuration.Enums;
+using ZB.MOM.WW.OtOpcUa.Core.Abstractions;
+using ZB.MOM.WW.OtOpcUa.Core.VirtualTags;
+using ZB.MOM.WW.OtOpcUa.Runtime.Drivers;
+using ZB.MOM.WW.OtOpcUa.Runtime.Tests.Harness;
+using ZB.MOM.WW.OtOpcUa.Runtime.VirtualTags;
+
+namespace ZB.MOM.WW.OtOpcUa.Runtime.Tests.Drivers;
+
+/// <summary>
+///     H5d (DI seam): pins that <see cref="DriverHostActor.Props"/> accepts an
+///     <see cref="IHistoryWriter"/> and threads it through to the REAL spawned
+///     <see cref="VirtualTagHostActor"/> (the <c>virtualTagHostOverride</c> is deliberately NOT used,
+///     so the production spawn path that wires <c>historyWriter</c> is exercised).
+/// </summary>
+/// <remarks>
+///     This is a construction/threading smoke test, not a record-behaviour test. The record path —
+///     "a Historize=true result is recorded with the IHistoryWriter under the folder-scoped NodeId" —
+///     is already covered end-to-end against the host directly by
+///     <c>VirtualTagHostActorTests.Historized_vtag_result_is_recorded_with_the_history_writer</c> (H5c).
+///     Driving a real spawned child to emit a synthetic <see cref="VirtualTagActor.EvaluationResult"/>
+///     from inside <see cref="DriverHostActor"/> would require reaching the auto-named grandchild and a
+///     live evaluator/mux feed — heavy and brittle for no extra coverage. So here we assert the writer
+///     threads through cleanly: a real apply carrying a Historize=true Equipment VirtualTag is Applied
+///     with the real host spawned and the capturing writer wired in, with no construction error.
+/// </remarks>
+public sealed class DriverHostActorHistoryWriterTests : RuntimeActorTestBase
+{
+    private static readonly NodeId TestNode = NodeId.Parse("driver-hw-test");
+    private static readonly RevisionHash RevA = RevisionHash.Parse(new string('a', 64));
+
+    /// <summary>Spawning a real DriverHostActor (no host override, publish actor wired so the real
+    /// VirtualTagHostActor spawns) with a capturing IHistoryWriter applies a Historize=true VirtualTag
+    /// deployment cleanly — proving Props/ctor accept the writer and thread it through the real spawn.</summary>
+    [Fact]
+    public void Props_accepts_history_writer_and_applies_historized_vtag_deployment()
+    {
+        var db = NewInMemoryDbFactory();
+        var deploymentId = SeedDeploymentWithHistorizedVirtualTag(db, RevA);
+
+        var coordinator = CreateTestProbe();
+        // A publish actor MUST be wired for SpawnVirtualTagHost to spawn the real host (its ctor
+        // requires a non-null sink). No virtualTagHostOverride ⇒ the real VirtualTagHostActor is
+        // spawned with _historyWriter threaded in.
+        var publish = CreateTestProbe();
+        var writer = new CapturingHistoryWriter();
+
+        var actor = Sys.ActorOf(DriverHostActor.Props(
+            db, TestNode, coordinator.Ref,
+            localRoles: new HashSet<string> { "driver" },
+            opcUaPublishActor: publish.Ref,
+            virtualTagEvaluator: NullVirtualTagEvaluator.Instance,
+            historyWriter: writer));
+
+        actor.Tell(new DispatchDeployment(deploymentId, RevA, CorrelationId.NewId()));
+
+        // The deployment Applies — the real VirtualTagHostActor spawned and accepted ApplyVirtualTags
+        // with the writer threaded through (a construction/threading failure would have faulted PreStart
+        // or the apply turn). Record behaviour itself is covered by VirtualTagHostActorTests (H5c).
+        coordinator.ExpectMsg<ApplyAck>(TimeSpan.FromSeconds(5)).Outcome.ShouldBe(ApplyAckOutcome.Applied);
+    }
+
+    private static DeploymentId SeedDeploymentWithHistorizedVirtualTag(
+        IDbContextFactory<OtOpcUaConfigDbContext> db, RevisionHash rev)
+    {
+        var artifact = JsonSerializer.SerializeToUtf8Bytes(new
+        {
+            Scripts = new[]
+            {
+                new
+                {
+                    ScriptId = "scr-1",
+                    SourceCode = "return ctx.GetTag(\"TestMachine_001.TestDouble\").Value;",
+                },
+            },
+            VirtualTags = new[]
+            {
+                new
+                {
+                    VirtualTagId = "vt-1",
+                    EquipmentId = "eq-1",
+                    Name = "Doubled",
+                    DataType = "Float",
+                    ScriptId = "scr-1",
+                    Historize = true,
+                },
+            },
+        });
+
+        var id = DeploymentId.NewId();
+        using var ctx = db.CreateDbContext();
+        ctx.Deployments.Add(new Deployment
+        {
+            DeploymentId = id.Value,
+            RevisionHash = rev.Value,
+            Status = DeploymentStatus.Sealed,
+            CreatedBy = "test",
+            SealedAtUtc = DateTime.UtcNow,
+            ArtifactBlob = artifact,
+        });
+        ctx.SaveChanges();
+        return id;
+    }
+
+    /// <summary>Capturing <see cref="IHistoryWriter"/>: records every Record call so the threading
+    /// smoke test can be tightened later if a record assertion becomes feasible here.</summary>
+    private sealed class CapturingHistoryWriter : IHistoryWriter
+    {
+        public readonly ConcurrentQueue<(string Path, DataValueSnapshot Value)> Calls = new();
+
+        /// <summary>Captures the path + snapshot of a Record call.</summary>
+        /// <param name="path">The virtual tag path.</param>
+        /// <param name="value">The data value snapshot.</param>
+        public void Record(string path, DataValueSnapshot value) => Calls.Enqueue((path, value));
+    }
+}