diff --git a/validator_client/src/block_producer/mod.rs b/validator_client/src/block_producer/mod.rs
index 8297469baf..77b7196667 100644
--- a/validator_client/src/block_producer/mod.rs
+++ b/validator_client/src/block_producer/mod.rs
@@ -10,11 +10,6 @@ use types::{BeaconBlock, ChainSpec, Domain, Fork, Slot};
 
 #[derive(Debug, PartialEq)]
 pub enum Error {
-    SlotClockError,
-    SlotUnknowable,
-    EpochMapPoisoned,
-    SlotClockPoisoned,
-    EpochLengthIsZero,
     BeaconBlockNodeError(BeaconBlockNodeError),
 }
 
@@ -34,7 +29,7 @@ pub enum ValidatorEvent {
 
 /// This struct contains the logic for requesting and signing beacon blocks for a validator. The
 /// validator can abstractly sign via the Signer trait object.
-pub struct BlockProducer<B: BeaconBlockNode, S: Signer> {
+pub struct BlockProducer<'a, B: BeaconBlockNode, S: Signer> {
     /// The current fork.
     pub fork: Fork,
     /// The current slot to produce a block for.
@@ -44,10 +39,10 @@ pub struct BlockProducer<B: BeaconBlockNode, S: Signer> {
     /// The beacon node to connect to.
     pub beacon_node: Arc<B>,
     /// The signer to sign the block.
-    pub signer: Arc<S>,
+    pub signer: &'a S,
 }
 
-impl<B: BeaconBlockNode, S: Signer> BlockProducer<B, S> {
+impl<'a, B: BeaconBlockNode, S: Signer> BlockProducer<'a, B, S> {
     /// Produce a block at some slot.
     ///
     /// Assumes that a block is required at this slot (does not check the duties).
diff --git a/validator_client/src/service.rs b/validator_client/src/service.rs
index d6c0e6638b..4c01d89671 100644
--- a/validator_client/src/service.rs
+++ b/validator_client/src/service.rs
@@ -299,17 +299,23 @@ impl<B: BeaconNodeDuties + 'static, S: Signer + 'static> Service<B, S> {
     /// If there are any duties to process, spawn a separate thread and perform required actions.
     fn process_duties(&mut self) {
         if let Some(work) = self.duties_manager.get_current_work(self.current_slot) {
-            for (_public_key, work_type) in work {
+            for (signer_index, work_type) in work {
                 if work_type.produce_block {
                     // spawns a thread to produce a beacon block
+                    let signers = self.duties_manager.signers.clone();
+                    let fork = self.fork.clone();
+                    let slot = self.current_slot.clone();
+                    let spec = self.spec.clone();
+                    let beacon_node = self.beacon_block_client.clone();
                     std::thread::spawn(move || {
-                        /*
+                        let signer = &signers[signer_index];
                         let block_producer = BlockProducer {
-                            fork: self.fork,
-                            slot: self.current_slot,
-                            spec: self.spec.clone(),
+                            fork,
+                            slot,
+                            spec,
+                            beacon_node,
+                            signer,
                         };
-                        */
                     });
 
                     // TODO: Produce a beacon block in a new thread
diff --git a/validator_client/src/signer.rs b/validator_client/src/signer.rs
index 49dedbb33f..4bbada08ee 100644
--- a/validator_client/src/signer.rs
+++ b/validator_client/src/signer.rs
@@ -2,7 +2,7 @@ use std::fmt::Display;
 use types::{Keypair, PublicKey, Signature};
 
 /// Signs message using an internally-maintained private key.
-pub trait Signer: Display + Send + Sync {
+pub trait Signer: Display + Send + Sync + Clone {
     fn sign_block_proposal(&self, message: &[u8], domain: u64) -> Option<Signature>;
     fn sign_randao_reveal(&self, message: &[u8], domain: u64) -> Option<Signature>;
     /// Returns a public key for the signer object.