diff --git a/deployments/sequencer/configs/overlays/hybrid/mainnet/chain_params.jsonnet b/deployments/sequencer/configs/overlays/hybrid/mainnet/chain_params.jsonnet
new file mode 100644
index 00000000000..fcfbe7c2cf3
--- /dev/null
+++ b/deployments/sequencer/configs/overlays/hybrid/mainnet/chain_params.jsonnet
@@ -0,0 +1,38 @@
+// chain_params for `mainnet` environment.
+// The env-shared P2P multiaddrs and per-node validator_id are in the devops repo.
+{
+  mandatory: {
+    chain_id: 'SN_MAIN',
+    starknet_url: 'https://feeder.alpha-mainnet.starknet.io/',
+    recorder_url: 'http://starknet-mainnet.cende-recorder-proxy.starknet.io/',
+    starknet_contract_address: '0xc662c410C0ECf747543f5bA90660f6ABeBD9C8c4',
+    base_layer: {
+      bpo1_start_block_number: 23973546,
+      bpo2_start_block_number: 24168146,
+      fusaka_no_bpo_start_block_number: 23934586,
+    },
+    staking_default_committee: '0,10:0x64,1,0x1,true;0x65,1,0x1,true;0x66,1,0x1,true;0x67,1,0x1,true;0x68,1,0x1,true',
+    proof_archive_bucket_name: 'starkware-starknet-mainnet',
+    nodes_at_same_cluster: true,
+    topology: import 'lib/layouts/hybrid.libsonnet',
+  },
+
+  native_classes_whitelist: '["0x054c5afe61ed27be53b1e4dec5707209a9fcabdb14712fb800fbc60439090115"]',
+  max_state_diff_in_block: 5000,
+  n_execution_workers: 12,
+  first_block_with_partial_block_hash: {
+    block_hash: '0x12889b177c93baa28b5ee3afc80cb6f4836adac086af4bef25ae1ac762e8a62',
+    block_number: 671813,
+    parent_block_hash: '0x1e68b0d22b14688dc97afa3006a53cf4e62ebcb02102e80f55e8b48f9a28b97',
+  },
+  committer_cache_size: 50000000,
+  min_l2_gas_price_per_height: '8269292:27400000000,8742344:30100000000',
+  central_sync_client_config: {
+    sync_config: {
+      store_sierras_and_casms_block_threshold: 103129,
+    },
+  },
+  state_sync_network_config: {
+    port: 55010,
+  },
+}
diff --git a/deployments/sequencer/configs/overlays/hybrid/mainnet/topology.jsonnet b/deployments/sequencer/configs/overlays/hybrid/mainnet/topology.jsonnet
new file mode 100644
index 00000000000..181e5ec8c9b
--- /dev/null
+++ b/deployments/sequencer/configs/overlays/hybrid/mainnet/topology.jsonnet
@@ -0,0 +1 @@
+import 'lib/layouts/hybrid.libsonnet'
diff --git a/deployments/sequencer/test/test_env_overlay_parity.py b/deployments/sequencer/test/test_env_overlay_parity.py
index b259a5e3c25..9e9ee78cd1d 100644
--- a/deployments/sequencer/test/test_env_overlay_parity.py
+++ b/deployments/sequencer/test/test_env_overlay_parity.py
@@ -174,3 +174,7 @@ def test_sepolia_integration_native_matches_yaml():
 
 def test_sepolia_alpha_native_matches_yaml():
     assert_env_overlay_matches_yaml(HYBRID_OVERLAYS_DIR / "sepolia-alpha")
+
+
+def test_mainnet_native_matches_yaml():
+    assert_env_overlay_matches_yaml(HYBRID_OVERLAYS_DIR / "mainnet")