diff --git a/consensus/types/src/core/config_and_preset.rs b/consensus/types/src/core/config_and_preset.rs
index 08141c77311..4b83112ca78 100644
--- a/consensus/types/src/core/config_and_preset.rs
+++ b/consensus/types/src/core/config_and_preset.rs
@@ -141,6 +141,13 @@ pub fn get_extra_fields(spec: &ChainSpec) -> HashMap<String, Value> {
         "compounding_withdrawal_prefix".to_uppercase() => u8_hex(spec.compounding_withdrawal_prefix_byte),
         "unset_deposit_requests_start_index".to_uppercase() => spec.unset_deposit_requests_start_index.to_string().into(),
         "full_exit_request_amount".to_uppercase() => spec.full_exit_request_amount.to_string().into(),
+        // Time parameters
+        "slot_duration_ms".to_uppercase() => spec.slot_duration_ms.to_string().into(),
+        "proposer_reorg_cutoff_bps".to_uppercase() => spec.proposer_reorg_cutoff_bps.to_string().into(),
+        "attestation_due_bps".to_uppercase() => spec.attestation_due_bps.to_string().into(),
+        "aggregate_due_bps".to_uppercase() => spec.aggregate_due_bps.to_string().into(),
+        "contribution_due_bps".to_uppercase() => spec.contribution_due_bps.to_string().into(),
+        "sync_message_due_bps".to_uppercase() => spec.sync_message_due_bps.to_string().into(),
     }
 }
 
@@ -183,4 +190,24 @@ mod test {
             serde_yaml::from_reader(reader).expect("error while deserializing");
         assert_eq!(ConfigAndPreset::Gloas(from), yamlconfig);
     }
+
+    // This is not exhaustive, but it can be extended as new fields are added to the spec.
+    #[test]
+    fn test_required_spec_fields_exist() {
+        let mainnet_spec = ChainSpec::mainnet();
+        let config = ConfigAndPreset::from_chain_spec::<MainnetEthSpec>(&mainnet_spec);
+        let json = serde_json::to_value(&config).expect("should serialize");
+        let obj = json.as_object().expect("should be an object");
+        let required_fields = [
+            "SLOT_DURATION_MS",
+            "PROPOSER_REORG_CUTOFF_BPS",
+            "ATTESTATION_DUE_BPS",
+            "AGGREGATE_DUE_BPS",
+            "CONTRIBUTION_DUE_BPS",
+            "SYNC_MESSAGE_DUE_BPS",
+        ];
+        for field in required_fields {
+            assert!(obj.contains_key(field), "Missing required field: {}", field);
+        }
+    }
 }