diff --git a/CHANGELOG.md b/CHANGELOG.md
index 53119b5..4ea3992 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,10 +7,16 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [UNRELEASED]
 
+
+### Fixed
+
+- Falling back to config file defaults when using executor via instantiation of executor class
+
 ### Docs
 
 - Updated docs to include more information about required/optional config values, and provide information about each cloud resource that needs to be provisioned.
 
+
 ## [0.11.0] - 2022-10-03
 
 
diff --git a/covalent_awslambda_plugin/awslambda.py b/covalent_awslambda_plugin/awslambda.py
index 615b1f7..9adcab7 100644
--- a/covalent_awslambda_plugin/awslambda.py
+++ b/covalent_awslambda_plugin/awslambda.py
@@ -151,11 +151,11 @@ class AWSLambdaExecutor(AWSExecutor):
 
     def __init__(
         self,
-        credentials_file: str,
-        profile: str,
-        region: str,
         s3_bucket_name: str,
         execution_role: str,
+        credentials_file: str = None,
+        profile: str = None,
+        region: str = None,
         poll_freq: int = None,
         timeout: int = None,
         memory_size: int = None,
@@ -164,11 +164,12 @@ def __init__(
 
         # AWSExecutor parameters
         required_attrs = {
-            "credentials_file": credentials_file,
-            "profile": profile,
-            "region": region,
-            "s3_bucket_name": s3_bucket_name,
-            "execution_role": execution_role,
+            "credentials_file": credentials_file
+            or get_config("executors.awslambda.credentials_file"),
+            "profile": profile or get_config("executors.awslambda.profile"),
+            "region": region or get_config("executors.awslambda.region"),
+            "s3_bucket_name": s3_bucket_name or get_config("executors.awslambda.s3_bucket_name"),
+            "execution_role": execution_role or get_config("executors.awslambda.execution_role"),
         }
 
         super().__init__(**required_attrs)