diff --git a/data-prepper-plugins/aws-lambda/src/integrationTest/java/org/opensearch/dataprepper/plugins/lambda/processor/LambdaProcessorServiceIT.java b/data-prepper-plugins/aws-lambda/src/integrationTest/java/org/opensearch/dataprepper/plugins/lambda/processor/LambdaProcessorServiceIT.java
index 686312cfe7..ab2c9b27a3 100644
--- a/data-prepper-plugins/aws-lambda/src/integrationTest/java/org/opensearch/dataprepper/plugins/lambda/processor/LambdaProcessorServiceIT.java
+++ b/data-prepper-plugins/aws-lambda/src/integrationTest/java/org/opensearch/dataprepper/plugins/lambda/processor/LambdaProcessorServiceIT.java
@@ -131,7 +131,7 @@ void verify_records_to_lambda_success(final int recordCount) throws Exception {
 
         when(lambdaProcessorConfig.getFunctionName()).thenReturn(functionName);
         when(lambdaProcessorConfig.getMaxConnectionRetries()).thenReturn(3);
-        when(lambdaProcessorConfig.getMode()).thenReturn("synchronous");
+        when(lambdaProcessorConfig.getInvocationType()).thenReturn("RequestResponse");
 
         LambdaProcessor objectUnderTest = createObjectUnderTest(lambdaProcessorConfig);
 
@@ -148,7 +148,7 @@ void verify_records_with_batching_to_lambda(final int recordCount) throws JsonPr
 
         when(lambdaProcessorConfig.getFunctionName()).thenReturn(functionName);
         when(lambdaProcessorConfig.getMaxConnectionRetries()).thenReturn(3);
-        when(lambdaProcessorConfig.getMode()).thenReturn("synchronous");
+        when(lambdaProcessorConfig.getInvocationType()).thenReturn("RequestResponse");
         when(thresholdOptions.getEventCount()).thenReturn(1);
         when(thresholdOptions.getMaximumSize()).thenReturn(ByteCount.parse("2mb"));
         when(thresholdOptions.getEventCollectTimeOut()).thenReturn(Duration.parse("PT10s"));
diff --git a/data-prepper-plugins/aws-lambda/src/main/java/org/opensearch/dataprepper/plugins/lambda/processor/LambdaProcessor.java b/data-prepper-plugins/aws-lambda/src/main/java/org/opensearch/dataprepper/plugins/lambda/processor/LambdaProcessor.java
index 8625b64575..3f809f53a8 100644
--- a/data-prepper-plugins/aws-lambda/src/main/java/org/opensearch/dataprepper/plugins/lambda/processor/LambdaProcessor.java
+++ b/data-prepper-plugins/aws-lambda/src/main/java/org/opensearch/dataprepper/plugins/lambda/processor/LambdaProcessor.java
@@ -57,8 +57,6 @@ public class LambdaProcessor extends AbstractProcessor<Record<Event>, Record<Eve
     public static final String LAMBDA_LATENCY_METRIC = "lambdaLatency";
     public static final String REQUEST_PAYLOAD_SIZE = "requestPayloadSize";
     public static final String RESPONSE_PAYLOAD_SIZE = "responsePayloadSize";
-    private static final String SYNC_INVOCATION_TYPE = "RequestResponse";
-    private static final String ASYNC_INVOCATION_TYPE = "Event";
     private static final Logger LOG = LoggerFactory.getLogger(LambdaProcessor.class);
 
     private final String functionName;
@@ -83,7 +81,6 @@ public class LambdaProcessor extends AbstractProcessor<Record<Event>, Record<Eve
     private ByteCount maxBytes = null;
     private Duration maxCollectionDuration = null;
     private int maxRetries = 0;
-    private String mode = null;
     private OutputCodec codec = null;
 
     @DataPrepperPluginConstructor
@@ -110,12 +107,11 @@ public LambdaProcessor(final PluginMetrics pluginMetrics, final LambdaProcessorC
             batchKey = null;
             isBatchEnabled = false;
         }
-        mode = lambdaProcessorConfig.getMode();
-        // TODO - Support for Async mode to be added.
-        if (mode != null && mode.equalsIgnoreCase(LambdaProcessorConfig.SYNCHRONOUS_MODE)) {
-            invocationType = SYNC_INVOCATION_TYPE;
-        } else {
-            throw new RuntimeException("Unsupported mode " + mode);
+        invocationType = lambdaProcessorConfig.getInvocationType();
+        // TODO - Support for Event invocation type to be added.
+        if(invocationType.equals(LambdaProcessorConfig.EVENT) ||
+        invocationType.equals(LambdaProcessorConfig.REQUEST_RESPONSE)){
+            throw new RuntimeException("Unsupported invocation type " + invocationType);
         }
 
         codec = new LambdaJsonCodec(batchKey);
diff --git a/data-prepper-plugins/aws-lambda/src/main/java/org/opensearch/dataprepper/plugins/lambda/processor/LambdaProcessorConfig.java b/data-prepper-plugins/aws-lambda/src/main/java/org/opensearch/dataprepper/plugins/lambda/processor/LambdaProcessorConfig.java
index 7a8abdf4a4..d7515daf1c 100644
--- a/data-prepper-plugins/aws-lambda/src/main/java/org/opensearch/dataprepper/plugins/lambda/processor/LambdaProcessorConfig.java
+++ b/data-prepper-plugins/aws-lambda/src/main/java/org/opensearch/dataprepper/plugins/lambda/processor/LambdaProcessorConfig.java
@@ -14,8 +14,8 @@
 
 public class LambdaProcessorConfig {
 
-    public static final String SYNCHRONOUS_MODE = "RequestResponse";
-    public static final String ASYNCHRONOUS_MODE = "Event";
+    public static final String REQUEST_RESPONSE = "RequestResponse";
+    public static final String EVENT = "Event";
     private static final int DEFAULT_CONNECTION_RETRIES = 3;
 
     @JsonProperty("aws")
@@ -32,8 +32,8 @@ public class LambdaProcessorConfig {
     @JsonProperty("max_retries")
     private int maxConnectionRetries = DEFAULT_CONNECTION_RETRIES;
 
-    @JsonProperty("mode")
-    private String mode = SYNCHRONOUS_MODE;
+    @JsonProperty("invocation_type")
+    private String invocationType = REQUEST_RESPONSE;
 
     @JsonProperty("batch")
     private BatchOptions batchOptions;
@@ -55,7 +55,7 @@ public int getMaxConnectionRetries() {
         return maxConnectionRetries;
     }
 
-    public String getMode(){return mode;}
+    public String getInvocationType(){return invocationType;}
 
     public String getWhenCondition() {
         return whenCondition;
diff --git a/data-prepper-plugins/aws-lambda/src/test/java/org/opensearch/dataprepper/plugins/lambda/processor/LambdaProcessorTest.java b/data-prepper-plugins/aws-lambda/src/test/java/org/opensearch/dataprepper/plugins/lambda/processor/LambdaProcessorTest.java
index 6288b95beb..0ce88e6402 100644
--- a/data-prepper-plugins/aws-lambda/src/test/java/org/opensearch/dataprepper/plugins/lambda/processor/LambdaProcessorTest.java
+++ b/data-prepper-plugins/aws-lambda/src/test/java/org/opensearch/dataprepper/plugins/lambda/processor/LambdaProcessorTest.java
@@ -121,7 +121,7 @@ public void setUp() throws IOException {
 
         lenient().when(lambdaProcessorConfig.getFunctionName()).thenReturn("test-function1");
         lenient().when(lambdaProcessorConfig.getMaxConnectionRetries()).thenReturn(3);
-        lenient().when(lambdaProcessorConfig.getMode()).thenReturn("requestresponse");
+        lenient().when(lambdaProcessorConfig.getInvocationType()).thenReturn("requestresponse");
 
         lenient().when(thresholdOptions.getEventCount()).thenReturn(10);
         lenient().when(thresholdOptions.getMaximumSize()).thenReturn(ByteCount.ofBytes(6));
@@ -264,7 +264,7 @@ public void testConvertLambdaResponseToEvent() throws JsonProcessingException {
 
     @Test
     public void testDoExecute_WithConfig() throws JsonProcessingException {
-        final String config = "        function_name: test_function\n" + "        mode: requestresponse\n" + "        aws:\n" + "          region: us-east-1\n" + "          sts_role_arn: arn:aws:iam::524239988912:role/app-test\n" + "          sts_header_overrides: {\"test\":\"test\"}\n" + "        max_retries: 3\n";
+        final String config = "        function_name: test_function\n" + "        invocation_type: requestresponse\n" + "        aws:\n" + "          region: us-east-1\n" + "          sts_role_arn: arn:aws:iam::524239988912:role/app-test\n" + "          sts_header_overrides: {\"test\":\"test\"}\n" + "        max_retries: 3\n";
 
         this.lambdaProcessorConfig = objectMapper.readValue(config, LambdaProcessorConfig.class);