diff --git a/noir-projects/aztec-nr/aztec/src/initializer.nr b/noir-projects/aztec-nr/aztec/src/initializer.nr
index 756debb09834..e454776e55ff 100644
--- a/noir-projects/aztec-nr/aztec/src/initializer.nr
+++ b/noir-projects/aztec-nr/aztec/src/initializer.nr
@@ -1,37 +1,73 @@
 use dep::protocol_types::{
-    hash::{silo_nullifier, pedersen_hash}, constants::GENERATOR_INDEX__CONSTRUCTOR,
-    abis::function_selector::FunctionSelector
+    address::AztecAddress, hash::{silo_nullifier, pedersen_hash},
+    constants::GENERATOR_INDEX__CONSTRUCTOR, abis::function_selector::FunctionSelector
 };
 
 use crate::{
-    context::{PrivateContext, PublicContext, ContextInterface},
+    context::{PrivateContext, PublicContext, AvmContext, ContextInterface},
     oracle::get_contract_instance::get_contract_instance,
     history::nullifier_inclusion::prove_nullifier_inclusion
 };
 
-pub fn mark_as_initialized<TContext>(context: &mut TContext) where TContext: ContextInterface {
-    let init_nullifier = compute_unsiloed_contract_initialization_nullifier(*context);
+pub fn mark_as_initialized_public(context: &mut PublicContext) {
+    mark_as_initialized(context);
+}
+
+pub fn mark_as_initialized_avm(context: &mut AvmContext) {
+    let init_nullifier = compute_unsiloed_contract_initialization_nullifier(context.this_address());
+    context.push_new_nullifier(init_nullifier, 0);
+}
+
+pub fn mark_as_initialized_private(context: &mut PrivateContext) {
+    mark_as_initialized(context);
+}
+
+fn mark_as_initialized<TContext>(context: &mut TContext) where TContext: ContextInterface {
+    let init_nullifier = compute_unsiloed_contract_initialization_nullifier((*context).this_address());
     ContextInterface::push_new_nullifier(context, init_nullifier, 0);
 }
 
-pub fn assert_is_initialized<TContext>(context: &mut TContext) where TContext: ContextInterface {
-    let init_nullifier = compute_contract_initialization_nullifier(*context);
+pub fn assert_is_initialized_public(context: &mut PublicContext) {
+    let init_nullifier = compute_contract_initialization_nullifier(context.this_address());
     prove_nullifier_inclusion(init_nullifier, *context);
 }
 
-pub fn compute_contract_initialization_nullifier<TContext>(context: TContext) -> Field where TContext: ContextInterface {
-    let address = context.this_address();
+pub fn assert_is_initialized_avm(context: &mut AvmContext) {
+    // FIXME: AVM simulator does not correctly handle nullifier siloing.
+    // let init_nullifier = compute_contract_initialization_nullifier(context.this_address());
+    let init_nullifier = compute_unsiloed_contract_initialization_nullifier(context.this_address());
+    assert(context.nullifier_exists(init_nullifier));
+}
+
+pub fn assert_is_initialized_private(context: &mut PrivateContext) {
+    let init_nullifier = compute_contract_initialization_nullifier(context.this_address());
+    prove_nullifier_inclusion(init_nullifier, *context);
+}
+
+fn compute_contract_initialization_nullifier(address: AztecAddress) -> Field {
     silo_nullifier(
         address,
-        compute_unsiloed_contract_initialization_nullifier(context)
+        compute_unsiloed_contract_initialization_nullifier(address)
     )
 }
 
-pub fn compute_unsiloed_contract_initialization_nullifier<TContext>(context: TContext) -> Field where TContext: ContextInterface {
-    context.this_address().to_field()
+fn compute_unsiloed_contract_initialization_nullifier(address: AztecAddress) -> Field {
+    address.to_field()
+}
+
+pub fn assert_initialization_matches_address_preimage_public(context: PublicContext) {
+    assert_initialization_matches_address_preimage(context);
+}
+
+pub fn assert_initialization_matches_address_preimage_avm(context: AvmContext) {
+    assert_initialization_matches_address_preimage(context);
+}
+
+pub fn assert_initialization_matches_address_preimage_private(context: PrivateContext) {
+    assert_initialization_matches_address_preimage(context);
 }
 
-pub fn assert_initialization_matches_address_preimage<TContext>(context: TContext) where TContext: ContextInterface {
+fn assert_initialization_matches_address_preimage<TContext>(context: TContext) where TContext: ContextInterface {
     let address = context.this_address();
     let instance = get_contract_instance(address);
     let expected_init = compute_initialization_hash(context.selector(), context.get_args_hash());
diff --git a/noir-projects/noir-contracts/contracts/avm_test_contract/src/main.nr b/noir-projects/noir-contracts/contracts/avm_test_contract/src/main.nr
index 442d6c2fdfbc..75e5cc00dd51 100644
--- a/noir-projects/noir-contracts/contracts/avm_test_contract/src/main.nr
+++ b/noir-projects/noir-contracts/contracts/avm_test_contract/src/main.nr
@@ -49,12 +49,11 @@ contract AvmTest {
     /************************************************************************
      * Storage
      ************************************************************************/
-    // FIX: calls unsupported getNullifierMembershipWitness.
-    // #[aztec(public-vm)]
-    // #[aztec(initializer)]
-    // fn constructor() {
-    //     storage.immutable.initialize(42);
-    // }
+    #[aztec(public-vm)]
+    #[aztec(initializer)]
+    fn constructor() {
+        storage.immutable.initialize(42);
+    }
 
     unconstrained fn view_storage_immutable() -> pub Field {
         storage.immutable.read()
diff --git a/noir-projects/noir-contracts/contracts/stateful_test_contract/src/main.nr b/noir-projects/noir-contracts/contracts/stateful_test_contract/src/main.nr
index d96acfef3fc8..ea4f6ba50c01 100644
--- a/noir-projects/noir-contracts/contracts/stateful_test_contract/src/main.nr
+++ b/noir-projects/noir-contracts/contracts/stateful_test_contract/src/main.nr
@@ -4,7 +4,7 @@ contract StatefulTest {
     use dep::value_note::{balance_utils, utils::{increment, decrement}, value_note::{VALUE_NOTE_LEN, ValueNote}};
     use dep::aztec::{
         deploy::deploy_contract as aztec_deploy_contract, context::{PublicContext, Context},
-        oracle::get_contract_instance::get_contract_instance, initializer::assert_is_initialized
+        oracle::get_contract_instance::get_contract_instance, initializer::assert_is_initialized_private
     };
 
     struct Storage {
@@ -45,7 +45,7 @@ contract StatefulTest {
 
     #[aztec(private)]
     fn destroy_and_create(recipient: AztecAddress, amount: Field) {
-        assert_is_initialized(&mut context);
+        assert_is_initialized_private(&mut context);
         let sender = context.msg_sender();
 
         let sender_notes = storage.notes.at(sender);
diff --git a/noir/noir-repo/aztec_macros/src/transforms/functions.rs b/noir/noir-repo/aztec_macros/src/transforms/functions.rs
index 9844abc30fe2..870f42c8d060 100644
--- a/noir/noir-repo/aztec_macros/src/transforms/functions.rs
+++ b/noir/noir-repo/aztec_macros/src/transforms/functions.rs
@@ -45,13 +45,13 @@ pub fn transform_function(
 
     // Add initialization check
     if insert_init_check {
-        let init_check = create_init_check();
+        let init_check = create_init_check(ty);
         func.def.body.statements.insert(0, init_check);
     }
 
     // Add assertion for initialization arguments and sender
     if is_initializer {
-        func.def.body.statements.insert(0, create_assert_initializer());
+        func.def.body.statements.insert(0, create_assert_initializer(ty));
     }
 
     // Add access to the storage struct
@@ -85,7 +85,7 @@ pub fn transform_function(
 
     // Before returning mark the contract as initialized
     if is_initializer {
-        let mark_initialized = create_mark_as_initialized();
+        let mark_initialized = create_mark_as_initialized(ty);
         func.def.body.statements.push(mark_initialized);
     }
 
@@ -159,9 +159,10 @@ fn create_inputs(ty: &str) -> Param {
 /// ```noir
 /// assert_is_initialized(&mut context);
 /// ```
-fn create_init_check() -> Statement {
+fn create_init_check(ty: &str) -> Statement {
+    let fname = format!("assert_is_initialized_{}", ty.to_case(Case::Snake));
     make_statement(StatementKind::Expression(call(
-        variable_path(chained_dep!("aztec", "initializer", "assert_is_initialized")),
+        variable_path(chained_dep!("aztec", "initializer", &fname)),
         vec![mutable_reference("context")],
     )))
 }
@@ -172,9 +173,10 @@ fn create_init_check() -> Statement {
 /// ```noir
 /// mark_as_initialized(&mut context);
 /// ```
-fn create_mark_as_initialized() -> Statement {
+fn create_mark_as_initialized(ty: &str) -> Statement {
+    let fname = format!("mark_as_initialized_{}", ty.to_case(Case::Snake));
     make_statement(StatementKind::Expression(call(
-        variable_path(chained_dep!("aztec", "initializer", "mark_as_initialized")),
+        variable_path(chained_dep!("aztec", "initializer", &fname)),
         vec![mutable_reference("context")],
     )))
 }
@@ -205,13 +207,11 @@ fn create_internal_check(fname: &str) -> Statement {
 /// ```noir
 /// assert_initialization_matches_address_preimage(context);
 /// ```
-fn create_assert_initializer() -> Statement {
+fn create_assert_initializer(ty: &str) -> Statement {
+    let fname =
+        format!("assert_initialization_matches_address_preimage_{}", ty.to_case(Case::Snake));
     make_statement(StatementKind::Expression(call(
-        variable_path(chained_dep!(
-            "aztec",
-            "initializer",
-            "assert_initialization_matches_address_preimage"
-        )),
+        variable_path(chained_dep!("aztec", "initializer", &fname)),
         vec![variable("context")],
     )))
 }
diff --git a/yarn-project/end-to-end/src/e2e_avm_simulator.test.ts b/yarn-project/end-to-end/src/e2e_avm_simulator.test.ts
index 2e9dfacae341..8f8a804dec8d 100644
--- a/yarn-project/end-to-end/src/e2e_avm_simulator.test.ts
+++ b/yarn-project/end-to-end/src/e2e_avm_simulator.test.ts
@@ -25,10 +25,9 @@ describe('e2e_avm_simulator', () => {
   }, 50_000);
 
   describe('Storage', () => {
-    // FIX: Enable once the contract function works.
-    // it('Read immutable (initialized) storage (Field)', async () => {
-    //   expect(await avmContact.methods.view_storage_immutable().view()).toEqual(42n);
-    // });
+    it('Read immutable (initialized) storage (Field)', async () => {
+      expect(await avmContact.methods.view_storage_immutable().view()).toEqual(42n);
+    });
 
     it('Modifies storage (Field)', async () => {
       await avmContact.methods.set_storage_single(20n).send().wait();
diff --git a/yarn-project/simulator/src/avm/journal/nullifiers.ts b/yarn-project/simulator/src/avm/journal/nullifiers.ts
index f8374f6f8a76..e843d4ee9a68 100644
--- a/yarn-project/simulator/src/avm/journal/nullifiers.ts
+++ b/yarn-project/simulator/src/avm/journal/nullifiers.ts
@@ -1,5 +1,6 @@
 import { siloNullifier } from '@aztec/circuits.js/hash';
 import { Fr } from '@aztec/foundation/fields';
+import { DebugLogger, createDebugLogger } from '@aztec/foundation/log';
 
 import type { CommitmentsDB } from '../../index.js';
 
@@ -9,6 +10,8 @@ import type { CommitmentsDB } from '../../index.js';
  * When a contract call completes, its cached nullifier set can be merged into its parent's.
  */
 export class Nullifiers {
+  private log: DebugLogger = createDebugLogger('aztec:nullifiers');
+
   /** Cached nullifiers. */
   private cache: NullifierCache;
   /** Parent's nullifier cache. Checked on cache-miss. */
@@ -41,16 +44,19 @@ export class Nullifiers {
   ): Promise<[/*exists=*/ boolean, /*isPending=*/ boolean, /*leafIndex=*/ Fr]> {
     // First check this cache
     let existsAsPending = this.cache.exists(storageAddress, nullifier);
+    this.log(`Checking nullifier ${nullifier} at contract ${storageAddress} in cache: ${existsAsPending}`);
     // Then check parent's cache
     if (!existsAsPending && this.parentCache) {
       existsAsPending = this.parentCache?.exists(storageAddress, nullifier);
     }
+    this.log(`Checking nullifier ${nullifier} at contract ${storageAddress} in parent cache: ${existsAsPending}`);
     // Finally try the host's Aztec state (a trip to the database)
     // If the value is found in the database, it will be associated with a leaf index!
     let leafIndex: bigint | undefined = undefined;
     if (!existsAsPending) {
       // silo the nullifier before checking for its existence in the host
       leafIndex = await this.hostNullifiers.getNullifierIndex(siloNullifier(storageAddress, nullifier));
+      this.log(`Checking nullifier index ${siloNullifier(storageAddress, nullifier)} in host: ${leafIndex}`);
     }
     const exists = existsAsPending || leafIndex !== undefined;
     leafIndex = leafIndex === undefined ? BigInt(0) : leafIndex;
@@ -64,6 +70,7 @@ export class Nullifiers {
    * @param nullifier - the nullifier to stage
    */
   public async append(storageAddress: Fr, nullifier: Fr) {
+    this.log(`Staging nullifier ${nullifier} at contract ${storageAddress}`);
     const [exists, ,] = await this.checkExists(storageAddress, nullifier);
     if (exists) {
       throw new NullifierCollisionError(
diff --git a/yarn-project/simulator/src/avm/opcodes/storage.ts b/yarn-project/simulator/src/avm/opcodes/storage.ts
index 3ca3bfa19aaf..ad7858f1406b 100644
--- a/yarn-project/simulator/src/avm/opcodes/storage.ts
+++ b/yarn-project/simulator/src/avm/opcodes/storage.ts
@@ -1,4 +1,5 @@
 import { Fr } from '@aztec/foundation/fields';
+import { createDebugLogger } from '@aztec/foundation/log';
 
 import type { AvmContext } from '../avm_context.js';
 import { Field } from '../avm_memory_types.js';
@@ -8,6 +9,8 @@ import { Addressing } from './addressing_mode.js';
 import { Instruction } from './instruction.js';
 
 abstract class BaseStorageInstruction extends Instruction {
+  static readonly log = createDebugLogger('aztec:avm_simulator:storage');
+
   // Informs (de)serialization. See Instruction.deserialize.
   public static readonly wireFormat: OperandType[] = [
     OperandType.UINT8,
@@ -47,6 +50,7 @@ export class SStore extends BaseStorageInstruction {
 
     const slot = context.machineState.memory.get(slotOffset).toFr();
     const data = context.machineState.memory.getSlice(srcOffset, this.size).map(field => field.toFr());
+    BaseStorageInstruction.log(`Writing ${data} to slot ${slot}`);
 
     for (const [index, value] of Object.entries(data)) {
       const adjustedSlot = slot.add(new Fr(BigInt(index)));
@@ -82,6 +86,7 @@ export class SLoad extends BaseStorageInstruction {
 
       context.machineState.memory.set(bOffset + i, new Field(data));
     }
+    BaseStorageInstruction.log(`Read ${context.machineState.memory.getSlice(bOffset, size)} from slot ${slot}.`);
 
     context.machineState.incrementPc();
   }