diff --git a/Cargo.lock b/Cargo.lock
index b892592ded33..0b4111f0aefc 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -7183,10 +7183,10 @@ dependencies = [
  "reth-engine-tree",
  "reth-ethereum-engine-primitives",
  "reth-evm",
+ "reth-node-types",
  "reth-payload-builder",
  "reth-payload-builder-primitives",
  "reth-payload-primitives",
- "reth-payload-validator",
  "reth-provider",
  "reth-prune",
  "reth-rpc-types-compat",
@@ -7235,7 +7235,6 @@ dependencies = [
  "reth-network-p2p",
  "reth-node-types",
  "reth-payload-builder",
- "reth-payload-validator",
  "reth-primitives",
  "reth-provider",
  "reth-prune",
@@ -7279,7 +7278,6 @@ dependencies = [
  "reth-payload-builder",
  "reth-payload-builder-primitives",
  "reth-payload-primitives",
- "reth-payload-validator",
  "reth-primitives",
  "reth-provider",
  "reth-prune",
diff --git a/crates/e2e-test-utils/src/lib.rs b/crates/e2e-test-utils/src/lib.rs
index 256833898640..15065377fabf 100644
--- a/crates/e2e-test-utils/src/lib.rs
+++ b/crates/e2e-test-utils/src/lib.rs
@@ -5,6 +5,7 @@ use reth_chainspec::EthChainSpec;
 use reth_db::{test_utils::TempDatabase, DatabaseEnv};
 use reth_engine_local::LocalPayloadAttributesBuilder;
 use reth_network_api::test_utils::PeersHandleProvider;
+use reth_node_api::EngineValidator;
 use reth_node_builder::{
     components::NodeComponentsBuilder,
     rpc::{EngineValidatorAddOn, RethRpcAddOns},
@@ -131,7 +132,10 @@ where
         >,
     >,
     N::AddOns: RethRpcAddOns<Adapter<N, BlockchainProvider2<NodeTypesWithDBAdapter<N, TmpDB>>>>
-        + EngineValidatorAddOn<Adapter<N, BlockchainProvider2<NodeTypesWithDBAdapter<N, TmpDB>>>>,
+        + EngineValidatorAddOn<
+            Adapter<N, BlockchainProvider2<NodeTypesWithDBAdapter<N, TmpDB>>>,
+            Validator: EngineValidator<N::Engine, Block = reth_primitives::Block>,
+        >,
     LocalPayloadAttributesBuilder<N::ChainSpec>: PayloadAttributesBuilder<
         <<N as NodeTypesWithEngine>::Engine as PayloadTypes>::PayloadAttributes,
     >,
diff --git a/crates/engine/local/Cargo.toml b/crates/engine/local/Cargo.toml
index a1b74d13fee7..d8a66e65e04c 100644
--- a/crates/engine/local/Cargo.toml
+++ b/crates/engine/local/Cargo.toml
@@ -16,12 +16,12 @@ reth-consensus.workspace = true
 reth-engine-primitives.workspace = true
 reth-engine-service.workspace = true
 reth-engine-tree.workspace = true
+reth-node-types.workspace = true
 reth-evm.workspace = true
 reth-ethereum-engine-primitives.workspace = true
 reth-payload-builder.workspace = true
 reth-payload-builder-primitives.workspace = true
 reth-payload-primitives.workspace = true
-reth-payload-validator.workspace = true
 reth-provider.workspace = true
 reth-prune.workspace = true
 reth-rpc-types-compat.workspace = true
diff --git a/crates/engine/local/src/service.rs b/crates/engine/local/src/service.rs
index e2b5e056d028..5838cb89116b 100644
--- a/crates/engine/local/src/service.rs
+++ b/crates/engine/local/src/service.rs
@@ -19,7 +19,7 @@ use futures_util::{Stream, StreamExt};
 use reth_beacon_consensus::{BeaconConsensusEngineEvent, EngineNodeTypes};
 use reth_chainspec::EthChainSpec;
 use reth_consensus::Consensus;
-use reth_engine_primitives::BeaconEngineMessage;
+use reth_engine_primitives::{BeaconEngineMessage, EngineValidator};
 use reth_engine_service::service::EngineMessageStream;
 use reth_engine_tree::{
     chain::{ChainEvent, HandlerEvent},
@@ -31,9 +31,9 @@ use reth_engine_tree::{
     tree::{EngineApiTreeHandler, InvalidBlockHook, TreeConfig},
 };
 use reth_evm::execute::BlockExecutorProvider;
+use reth_node_types::BlockTy;
 use reth_payload_builder::PayloadBuilderHandle;
 use reth_payload_primitives::{PayloadAttributesBuilder, PayloadTypes};
-use reth_payload_validator::ExecutionPayloadValidator;
 use reth_provider::{providers::BlockchainProvider2, ChainSpecProvider, ProviderFactory};
 use reth_prune::PrunerWithFactory;
 use reth_stages_api::MetricEventsSender;
@@ -63,13 +63,14 @@ where
 {
     /// Constructor for [`LocalEngineService`].
     #[allow(clippy::too_many_arguments)]
-    pub fn new<B>(
+    pub fn new<B, V>(
         consensus: Arc<dyn Consensus>,
         executor_factory: impl BlockExecutorProvider,
         provider: ProviderFactory<N>,
         blockchain_db: BlockchainProvider2<N>,
         pruner: PrunerWithFactory<ProviderFactory<N>>,
         payload_builder: PayloadBuilderHandle<N::Engine>,
+        payload_validator: V,
         tree_config: TreeConfig,
         invalid_block_hook: Box<dyn InvalidBlockHook>,
         sync_metrics_tx: MetricEventsSender,
@@ -80,6 +81,7 @@ where
     ) -> Self
     where
         B: PayloadAttributesBuilder<<N::Engine as PayloadTypes>::PayloadAttributes>,
+        V: EngineValidator<N::Engine, Block = BlockTy<N>>,
     {
         let chain_spec = provider.chain_spec();
         let engine_kind =
@@ -87,8 +89,6 @@ where
 
         let persistence_handle =
             PersistenceHandle::spawn_service(provider, pruner, sync_metrics_tx);
-        let payload_validator = ExecutionPayloadValidator::new(chain_spec);
-
         let canonical_in_memory_state = blockchain_db.canonical_in_memory_state();
 
         let (to_tree_tx, from_tree) = EngineApiTreeHandler::<N::Primitives, _, _, _, _>::spawn_new(
diff --git a/crates/engine/service/Cargo.toml b/crates/engine/service/Cargo.toml
index 8359c453dccb..8854fd18879d 100644
--- a/crates/engine/service/Cargo.toml
+++ b/crates/engine/service/Cargo.toml
@@ -18,7 +18,6 @@ reth-engine-tree.workspace = true
 reth-evm.workspace = true
 reth-network-p2p.workspace = true
 reth-payload-builder.workspace = true
-reth-payload-validator.workspace = true
 reth-provider.workspace = true
 reth-prune.workspace = true
 reth-stages-api.workspace = true
diff --git a/crates/engine/service/src/service.rs b/crates/engine/service/src/service.rs
index 44d145c9c0b6..a54a2ef9e1a1 100644
--- a/crates/engine/service/src/service.rs
+++ b/crates/engine/service/src/service.rs
@@ -3,7 +3,7 @@ use pin_project::pin_project;
 use reth_beacon_consensus::{BeaconConsensusEngineEvent, EngineNodeTypes};
 use reth_chainspec::EthChainSpec;
 use reth_consensus::Consensus;
-use reth_engine_primitives::BeaconEngineMessage;
+use reth_engine_primitives::{BeaconEngineMessage, EngineValidator};
 use reth_engine_tree::{
     backfill::PipelineSync,
     download::BasicBlockDownloader,
@@ -17,9 +17,8 @@ pub use reth_engine_tree::{
 };
 use reth_evm::execute::BlockExecutorProvider;
 use reth_network_p2p::EthBlockClient;
-use reth_node_types::NodeTypesWithEngine;
+use reth_node_types::{BlockTy, NodeTypesWithEngine};
 use reth_payload_builder::PayloadBuilderHandle;
-use reth_payload_validator::ExecutionPayloadValidator;
 use reth_provider::{providers::BlockchainProvider2, ProviderFactory};
 use reth_prune::PrunerWithFactory;
 use reth_stages_api::{MetricEventsSender, Pipeline};
@@ -65,7 +64,7 @@ where
 {
     /// Constructor for `EngineService`.
     #[allow(clippy::too_many_arguments)]
-    pub fn new(
+    pub fn new<V>(
         consensus: Arc<dyn Consensus>,
         executor_factory: E,
         chain_spec: Arc<N::ChainSpec>,
@@ -77,10 +76,14 @@ where
         blockchain_db: BlockchainProvider2<N>,
         pruner: PrunerWithFactory<ProviderFactory<N>>,
         payload_builder: PayloadBuilderHandle<N::Engine>,
+        payload_validator: V,
         tree_config: TreeConfig,
         invalid_block_hook: Box<dyn InvalidBlockHook>,
         sync_metrics_tx: MetricEventsSender,
-    ) -> Self {
+    ) -> Self
+    where
+        V: EngineValidator<N::Engine, Block = BlockTy<N>>,
+    {
         let engine_kind =
             if chain_spec.is_optimism() { EngineApiKind::OpStack } else { EngineApiKind::Ethereum };
 
@@ -88,7 +91,6 @@ where
 
         let persistence_handle =
             PersistenceHandle::spawn_service(provider, pruner, sync_metrics_tx);
-        let payload_validator = ExecutionPayloadValidator::new(chain_spec);
 
         let canonical_in_memory_state = blockchain_db.canonical_in_memory_state();
 
@@ -148,7 +150,7 @@ mod tests {
     use reth_chainspec::{ChainSpecBuilder, MAINNET};
     use reth_engine_primitives::BeaconEngineMessage;
     use reth_engine_tree::{test_utils::TestPipelineBuilder, tree::NoopInvalidBlockHook};
-    use reth_ethereum_engine_primitives::EthEngineTypes;
+    use reth_ethereum_engine_primitives::{EthEngineTypes, EthereumEngineValidator};
     use reth_evm_ethereum::execute::EthExecutorProvider;
     use reth_exex_types::FinishedExExHeight;
     use reth_network_p2p::test_utils::TestFullBlockClient;
@@ -186,7 +188,7 @@ mod tests {
         let blockchain_db =
             BlockchainProvider2::with_latest(provider_factory.clone(), SealedHeader::default())
                 .unwrap();
-
+        let engine_payload_validator = EthereumEngineValidator::new(chain_spec.clone());
         let (_tx, rx) = watch::channel(FinishedExExHeight::NoExExs);
         let pruner = Pruner::new_with_factory(provider_factory.clone(), vec![], 0, 0, None, rx);
 
@@ -204,6 +206,7 @@ mod tests {
             blockchain_db,
             pruner,
             PayloadBuilderHandle::new(tx),
+            engine_payload_validator,
             TreeConfig::default(),
             Box::new(NoopInvalidBlockHook::default()),
             sync_metrics_tx,
diff --git a/crates/engine/tree/Cargo.toml b/crates/engine/tree/Cargo.toml
index 47e5c2b04fe2..680b6933ebe6 100644
--- a/crates/engine/tree/Cargo.toml
+++ b/crates/engine/tree/Cargo.toml
@@ -16,7 +16,7 @@ reth-beacon-consensus.workspace = true
 reth-blockchain-tree-api.workspace = true
 reth-blockchain-tree.workspace = true
 reth-chain-state.workspace = true
-reth-chainspec.workspace = true
+reth-chainspec = { workspace = true, optional = true }
 reth-consensus.workspace = true
 reth-engine-primitives.workspace = true
 reth-errors.workspace = true
@@ -25,7 +25,6 @@ reth-network-p2p.workspace = true
 reth-payload-builder-primitives.workspace = true
 reth-payload-builder.workspace = true
 reth-payload-primitives.workspace = true
-reth-payload-validator.workspace = true
 reth-primitives.workspace = true
 reth-provider.workspace = true
 reth-prune.workspace = true
diff --git a/crates/engine/tree/src/tree/mod.rs b/crates/engine/tree/src/tree/mod.rs
index 44270cbfdf48..5dc8039afe65 100644
--- a/crates/engine/tree/src/tree/mod.rs
+++ b/crates/engine/tree/src/tree/mod.rs
@@ -1,8 +1,9 @@
 use crate::{
     backfill::{BackfillAction, BackfillSyncState},
     chain::FromOrchestrator,
-    engine::{DownloadRequest, EngineApiEvent, FromEngine},
+    engine::{DownloadRequest, EngineApiEvent, EngineApiKind, EngineApiRequest, FromEngine},
     persistence::PersistenceHandle,
+    tree::metrics::EngineApiMetrics,
 };
 use alloy_consensus::{BlockHeader, Header};
 use alloy_eips::BlockNumHash;
@@ -24,18 +25,16 @@ use reth_blockchain_tree::{
 use reth_chain_state::{
     CanonicalInMemoryState, ExecutedBlock, MemoryOverlayStateProvider, NewCanonicalChain,
 };
-use reth_chainspec::EthereumHardforks;
 use reth_consensus::{Consensus, PostExecutionInput};
 use reth_engine_primitives::{
     BeaconEngineMessage, BeaconOnNewPayloadError, EngineApiMessageVersion, EngineTypes,
-    ForkchoiceStateTracker, OnForkChoiceUpdated,
+    EngineValidator, ForkchoiceStateTracker, OnForkChoiceUpdated,
 };
 use reth_errors::{ConsensusError, ProviderResult};
 use reth_evm::execute::BlockExecutorProvider;
 use reth_payload_builder::PayloadBuilderHandle;
 use reth_payload_builder_primitives::PayloadBuilder;
 use reth_payload_primitives::{PayloadAttributes, PayloadBuilderAttributes};
-use reth_payload_validator::ExecutionPayloadValidator;
 use reth_primitives::{
     Block, EthPrimitives, GotExpected, NodePrimitives, SealedBlock, SealedBlockWithSenders,
     SealedHeader,
@@ -72,10 +71,6 @@ pub mod config;
 mod invalid_block_hook;
 mod metrics;
 mod persistence_state;
-use crate::{
-    engine::{EngineApiKind, EngineApiRequest},
-    tree::metrics::EngineApiMetrics,
-};
 pub use config::TreeConfig;
 pub use invalid_block_hook::{InvalidBlockHooks, NoopInvalidBlockHook};
 pub use persistence_state::PersistenceState;
@@ -472,11 +467,14 @@ pub enum TreeAction {
 ///
 /// This type is responsible for processing engine API requests, maintaining the canonical state and
 /// emitting events.
-pub struct EngineApiTreeHandler<N, P, E, T: EngineTypes, Spec> {
+pub struct EngineApiTreeHandler<N, P, E, T, V>
+where
+    T: EngineTypes,
+{
     provider: P,
     executor_provider: E,
     consensus: Arc<dyn Consensus>,
-    payload_validator: ExecutionPayloadValidator<Spec>,
+    payload_validator: V,
     /// Keeps track of internals such as executed and buffered blocks.
     state: EngineApiTreeState,
     /// The half for sending messages to the engine.
@@ -516,8 +514,8 @@ pub struct EngineApiTreeHandler<N, P, E, T: EngineTypes, Spec> {
     _primtives: PhantomData<N>,
 }
 
-impl<N, P: Debug, E: Debug, T: EngineTypes + Debug, Spec: Debug> std::fmt::Debug
-    for EngineApiTreeHandler<N, P, E, T, Spec>
+impl<N, P: Debug, E: Debug, T: EngineTypes + Debug, V: Debug> std::fmt::Debug
+    for EngineApiTreeHandler<N, P, E, T, V>
 {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         f.debug_struct("EngineApiTreeHandler")
@@ -540,7 +538,7 @@ impl<N, P: Debug, E: Debug, T: EngineTypes + Debug, Spec: Debug> std::fmt::Debug
     }
 }
 
-impl<N, P, E, T, Spec> EngineApiTreeHandler<N, P, E, T, Spec>
+impl<N, P, E, T, V> EngineApiTreeHandler<N, P, E, T, V>
 where
     N: NodePrimitives,
     P: DatabaseProviderFactory
@@ -552,7 +550,7 @@ where
     <P as DatabaseProviderFactory>::Provider: BlockReader,
     E: BlockExecutorProvider,
     T: EngineTypes,
-    Spec: Send + Sync + EthereumHardforks + 'static,
+    V: EngineValidator<T, Block = reth_primitives::Block>,
 {
     /// Creates a new [`EngineApiTreeHandler`].
     #[allow(clippy::too_many_arguments)]
@@ -560,7 +558,7 @@ where
         provider: P,
         executor_provider: E,
         consensus: Arc<dyn Consensus>,
-        payload_validator: ExecutionPayloadValidator<Spec>,
+        payload_validator: V,
         outgoing: UnboundedSender<EngineApiEvent>,
         state: EngineApiTreeState,
         canonical_in_memory_state: CanonicalInMemoryState,
@@ -609,7 +607,7 @@ where
         provider: P,
         executor_provider: E,
         consensus: Arc<dyn Consensus>,
-        payload_validator: ExecutionPayloadValidator<Spec>,
+        payload_validator: V,
         persistence: PersistenceHandle,
         payload_builder: PayloadBuilderHandle<T>,
         canonical_in_memory_state: CanonicalInMemoryState,
@@ -2629,7 +2627,7 @@ mod tests {
     use reth_chain_state::{test_utils::TestBlockBuilder, BlockState};
     use reth_chainspec::{ChainSpec, HOLESKY, MAINNET};
     use reth_engine_primitives::ForkchoiceStatus;
-    use reth_ethereum_engine_primitives::EthEngineTypes;
+    use reth_ethereum_engine_primitives::{EthEngineTypes, EthereumEngineValidator};
     use reth_evm::test_utils::MockExecutorProvider;
     use reth_primitives::{BlockExt, EthPrimitives};
     use reth_provider::test_utils::MockEthProvider;
@@ -2701,7 +2699,7 @@ mod tests {
             MockEthProvider,
             MockExecutorProvider,
             EthEngineTypes,
-            ChainSpec,
+            EthereumEngineValidator,
         >,
         to_tree_tx: Sender<FromEngine<EngineApiRequest<EthEngineTypes>>>,
         from_tree_rx: UnboundedReceiver<EngineApiEvent>,
@@ -2736,7 +2734,7 @@ mod tests {
             let provider = MockEthProvider::default();
             let executor_provider = MockExecutorProvider::default();
 
-            let payload_validator = ExecutionPayloadValidator::new(chain_spec.clone());
+            let payload_validator = EthereumEngineValidator::new(chain_spec.clone());
 
             let (from_tree_tx, from_tree_rx) = unbounded_channel();
 
diff --git a/crates/node/builder/src/launch/engine.rs b/crates/node/builder/src/launch/engine.rs
index 430ca31a5b16..b1141314d106 100644
--- a/crates/node/builder/src/launch/engine.rs
+++ b/crates/node/builder/src/launch/engine.rs
@@ -19,8 +19,8 @@ use reth_exex::ExExManagerHandle;
 use reth_network::{NetworkSyncUpdater, SyncState};
 use reth_network_api::BlockDownloaderProvider;
 use reth_node_api::{
-    BuiltPayload, FullNodeTypes, NodeTypesWithEngine, PayloadAttributesBuilder, PayloadBuilder,
-    PayloadTypes,
+    BlockTy, BuiltPayload, EngineValidator, FullNodeTypes, NodeTypesWithEngine,
+    PayloadAttributesBuilder, PayloadBuilder, PayloadTypes,
 };
 use reth_node_core::{
     dirs::{ChainPath, DataDirPath},
@@ -75,7 +75,14 @@ where
     T: FullNodeTypes<Types = Types, Provider = BlockchainProvider2<Types>>,
     CB: NodeComponentsBuilder<T>,
     AO: RethRpcAddOns<NodeAdapter<T, CB::Components>>
-        + EngineValidatorAddOn<NodeAdapter<T, CB::Components>>,
+        + EngineValidatorAddOn<
+            NodeAdapter<T, CB::Components>,
+            Validator: EngineValidator<
+                <Types as NodeTypesWithEngine>::Engine,
+                Block = BlockTy<Types>,
+            >,
+        >,
+
     LocalPayloadAttributesBuilder<Types::ChainSpec>: PayloadAttributesBuilder<
         <<Types as NodeTypesWithEngine>::Engine as PayloadTypes>::PayloadAttributes,
     >,
@@ -196,10 +203,24 @@ where
                 pruner_builder.finished_exex_height(exex_manager_handle.finished_height());
         }
         let pruner = pruner_builder.build_with_provider_factory(ctx.provider_factory().clone());
-
         let pruner_events = pruner.events();
         info!(target: "reth::cli", prune_config=?ctx.prune_config().unwrap_or_default(), "Pruner initialized");
 
+        let event_sender = EventSender::default();
+        let beacon_engine_handle =
+            BeaconConsensusEngineHandle::new(consensus_engine_tx.clone(), event_sender.clone());
+
+        // extract the jwt secret from the args if possible
+        let jwt_secret = ctx.auth_jwt_secret()?;
+
+        let add_ons_ctx = AddOnsContext {
+            node: ctx.node_adapter().clone(),
+            config: ctx.node_config(),
+            beacon_engine_handle: beacon_engine_handle.clone(),
+            jwt_secret,
+        };
+        let engine_payload_validator = add_ons.engine_validator(&add_ons_ctx).await?;
+
         let mut engine_service = if ctx.is_dev() {
             let eth_service = LocalEngineService::new(
                 ctx.consensus(),
@@ -208,6 +229,7 @@ where
                 ctx.blockchain_db().clone(),
                 pruner,
                 ctx.components().payload_builder().clone(),
+                engine_payload_validator,
                 engine_tree_config,
                 ctx.invalid_block_hook()?,
                 ctx.sync_metrics_tx(),
@@ -231,6 +253,7 @@ where
                 ctx.blockchain_db().clone(),
                 pruner,
                 ctx.components().payload_builder().clone(),
+                engine_payload_validator,
                 engine_tree_config,
                 ctx.invalid_block_hook()?,
                 ctx.sync_metrics_tx(),
@@ -239,11 +262,6 @@ where
             Either::Right(eth_service)
         };
 
-        let event_sender = EventSender::default();
-
-        let beacon_engine_handle =
-            BeaconConsensusEngineHandle::new(consensus_engine_tx, event_sender.clone());
-
         info!(target: "reth::cli", "Consensus engine initialized");
 
         let events = stream_select!(
@@ -269,16 +287,6 @@ where
             ),
         );
 
-        // extract the jwt secret from the args if possible
-        let jwt_secret = ctx.auth_jwt_secret()?;
-
-        let add_ons_ctx = AddOnsContext {
-            node: ctx.node_adapter().clone(),
-            config: ctx.node_config(),
-            beacon_engine_handle,
-            jwt_secret,
-        };
-
         let RpcHandle { rpc_server_handles, rpc_registry } =
             add_ons.launch_add_ons(add_ons_ctx).await?;
 
diff --git a/crates/node/builder/src/launch/mod.rs b/crates/node/builder/src/launch/mod.rs
index 627145d2df7a..9f2c027f76b5 100644
--- a/crates/node/builder/src/launch/mod.rs
+++ b/crates/node/builder/src/launch/mod.rs
@@ -70,7 +70,7 @@ pub trait LaunchNode<Target> {
     type Node;
 
     /// Create and return a new node asynchronously.
-    fn launch_node(self, target: Target) -> impl Future<Output = eyre::Result<Self::Node>> + Send;
+    fn launch_node(self, target: Target) -> impl Future<Output = eyre::Result<Self::Node>>;
 }
 
 impl<F, Target, Fut, Node> LaunchNode<Target> for F
@@ -80,7 +80,7 @@ where
 {
     type Node = Node;
 
-    fn launch_node(self, target: Target) -> impl Future<Output = eyre::Result<Self::Node>> + Send {
+    fn launch_node(self, target: Target) -> impl Future<Output = eyre::Result<Self::Node>> {
         self(target)
     }
 }
diff --git a/crates/node/builder/src/rpc.rs b/crates/node/builder/src/rpc.rs
index 2eae77f8d835..55313f3e9898 100644
--- a/crates/node/builder/src/rpc.rs
+++ b/crates/node/builder/src/rpc.rs
@@ -601,7 +601,7 @@ where
 }
 
 /// A type that knows how to build the engine validator.
-pub trait EngineValidatorBuilder<Node: FullNodeComponents>: Send + Clone {
+pub trait EngineValidatorBuilder<Node: FullNodeComponents>: Send + Sync + Clone {
     /// The consensus implementation to build.
     type Validator: EngineValidator<<Node::Types as NodeTypesWithEngine>::Engine>;
 
@@ -617,7 +617,7 @@ where
     Node: FullNodeComponents,
     Validator:
         EngineValidator<<Node::Types as NodeTypesWithEngine>::Engine> + Clone + Unpin + 'static,
-    F: FnOnce(&AddOnsContext<'_, Node>) -> Fut + Send + Clone,
+    F: FnOnce(&AddOnsContext<'_, Node>) -> Fut + Send + Sync + Clone,
     Fut: Future<Output = eyre::Result<Validator>> + Send,
 {
     type Validator = Validator;