diff --git a/flintrock/config.yaml.template b/flintrock/config.yaml.template
index 46c9cf06..54c7b51f 100644
--- a/flintrock/config.yaml.template
+++ b/flintrock/config.yaml.template
@@ -32,6 +32,9 @@ providers:
     # vpc-id: <id>
     # subnet-id: <id>
     # placement-group: <name>
+    # security-groups:
+    #   - sg-group-name1
+    #   - sg-group-name2
     tenancy: default  # default | dedicated
     ebs-optimized: no  # yes | no
     instance-initiated-shutdown-behavior: terminate  # terminate | stop
diff --git a/flintrock/ec2.py b/flintrock/ec2.py
index d6ecd645..7238332a 100644
--- a/flintrock/ec2.py
+++ b/flintrock/ec2.py
@@ -283,6 +283,31 @@ def check_network_config(*, region_name: str, vpc_id: str, subnet_id: str):
         )
 
 
+def get_ec2_security_groups(
+        vpc_id,
+        region,
+        security_groups) -> "List[boto3.resource('ec2').SecurityGroup]":
+    ec2 = boto3.resource(service_name='ec2', region_name=region)
+
+    # Resolve security group names
+    groups = list(
+        ec2.security_groups.filter(
+            Filters=[
+                # 'group-name' supports non-default VPC security group name search
+                {'Name': 'group-name', 'Values': security_groups},
+                {'Name': 'vpc-id', 'Values': [vpc_id]},
+            ]))
+
+    # Find if any groups are missing
+    group_names = [group.group_name for group in groups]
+    non_found_groups = set(security_groups) - set(group_names)
+    if len(non_found_groups) > 0:
+        raise Exception("Error security group name not found: {groups}".format(
+            groups=non_found_groups))
+
+    return groups
+
+
 def get_or_create_ec2_security_groups(
         *,
         cluster_name,
@@ -477,6 +502,7 @@ def launch(
         availability_zone,
         ami,
         user,
+        security_groups,
         spot_price=None,
         vpc_id,
         subnet_id,
@@ -513,10 +539,16 @@ def launch(
                 v=vpc_id))
 
     try:
-        security_groups = get_or_create_ec2_security_groups(
+        flintrock_security_groups = get_or_create_ec2_security_groups(
             cluster_name=cluster_name,
             vpc_id=vpc_id,
             region=region)
+        # Convert security group ids to boto3 security groups
+        security_groups = get_ec2_security_groups(
+            vpc_id=vpc_id,
+            region=region,
+            security_groups=security_groups)
+        security_group_ids = [sg.id for sg in security_groups + flintrock_security_groups]
         block_device_mappings = get_ec2_block_device_mappings(
             ami=ami,
             region=region)
@@ -551,7 +583,7 @@ def launch(
                     'Placement': {
                         'AvailabilityZone': availability_zone,
                         'GroupName': placement_group},
-                    'SecurityGroupIds': [sg.id for sg in security_groups],
+                    'SecurityGroupIds': security_group_ids,
                     'SubnetId': subnet_id,
                     'IamInstanceProfile': {
                         'Name': instance_profile_name},
@@ -600,7 +632,7 @@ def launch(
                     'AvailabilityZone': availability_zone,
                     'Tenancy': tenancy,
                     'GroupName': placement_group},
-                SecurityGroupIds=[sg.id for sg in security_groups],
+                SecurityGroupIds=security_group_ids,
                 SubnetId=subnet_id,
                 IamInstanceProfile={
                     'Name': instance_profile_name},
diff --git a/flintrock/flintrock.py b/flintrock/flintrock.py
index ef6614fb..960d14ef 100644
--- a/flintrock/flintrock.py
+++ b/flintrock/flintrock.py
@@ -210,6 +210,10 @@ def cli(cli_context, config, provider):
 @click.option('--ec2-availability-zone', default='')
 @click.option('--ec2-ami')
 @click.option('--ec2-user')
+@click.option('--ec2-security-group', 'ec2_security_groups',
+              multiple=True,
+              help="Additional security groups names to assign to the instances. "
+                   "You can specify this option multiple times.")
 @click.option('--ec2-spot-price', type=float)
 @click.option('--ec2-vpc-id', default='', help="Leave empty for default VPC.")
 @click.option('--ec2-subnet-id', default='')
@@ -240,6 +244,7 @@ def launch(
         ec2_availability_zone,
         ec2_ami,
         ec2_user,
+        ec2_security_groups,
         ec2_spot_price,
         ec2_vpc_id,
         ec2_subnet_id,
@@ -320,6 +325,7 @@ def launch(
             availability_zone=ec2_availability_zone,
             ami=ec2_ami,
             user=ec2_user,
+            security_groups=ec2_security_groups,
             spot_price=ec2_spot_price,
             vpc_id=ec2_vpc_id,
             subnet_id=ec2_subnet_id,