diff --git a/grails-app/conf/BootStrap.groovy b/grails-app/conf/BootStrap.groovy
index 19d1986f..7c0bd58d 100644
--- a/grails-app/conf/BootStrap.groovy
+++ b/grails-app/conf/BootStrap.groovy
@@ -138,6 +138,7 @@ class BootStrap {
             else
                 properties.setProperty(IceOptions.START_MILLIS, "" + new DateTime(DateTimeZone.UTC).withMillisOfDay(0).withDayOfMonth(1).getMillis());
             properties.setProperty(IceOptions.WORK_S3_BUCKET_NAME, prop.getProperty(IceOptions.WORK_S3_BUCKET_NAME));
+            properties.setProperty(IceOptions.WORK_S3_BUCKET_REGION, prop.getProperty(IceOptions.WORK_S3_BUCKET_REGION));
             properties.setProperty(IceOptions.WORK_S3_BUCKET_PREFIX, prop.getProperty(IceOptions.WORK_S3_BUCKET_PREFIX));
             properties.setProperty(IceOptions.CUSTOM_TAGS, prop.getProperty(IceOptions.CUSTOM_TAGS, ""));
 
diff --git a/src/java/com/netflix/ice/common/AwsUtils.java b/src/java/com/netflix/ice/common/AwsUtils.java
index f179a520..6e0c6d71 100755
--- a/src/java/com/netflix/ice/common/AwsUtils.java
+++ b/src/java/com/netflix/ice/common/AwsUtils.java
@@ -84,7 +84,7 @@ public static Credentials getAssumedCredentials(String accountId, String assumeR
      * This method must be called before all methods can be used.
      * @param credentialsProvider
      */
-    public static void init(AWSCredentialsProvider credentialsProvider) {
+    public static void init(AWSCredentialsProvider credentialsProvider, String workS3BucketRegion) {
         awsCredentialsProvider = credentialsProvider;
         clientConfig = new ClientConfiguration();
         String proxyHost = System.getProperty("https.proxyHost");
@@ -95,13 +95,11 @@ public static void init(AWSCredentialsProvider credentialsProvider) {
         }
         s3Client = new AmazonS3Client(awsCredentialsProvider, clientConfig);
         securityClient = new AWSSecurityTokenServiceClient(awsCredentialsProvider, clientConfig);
-        if (System.getProperty("EC2_REGION") != null && !"us-east-1".equals(System.getProperty("EC2_REGION"))) {
-            if ("global".equals(System.getProperty("EC2_REGION"))) {
-                s3Client.setEndpoint("s3.amazonaws.com");
-            }
-            else {
-                s3Client.setEndpoint("s3-" + System.getProperty("EC2_REGION") + ".amazonaws.com");
-            }
+        if("us-east-1".equals(workS3BucketRegion)) {
+            s3Client.setEndpoint("s3.amazonaws.com");
+        }
+        else {
+            s3Client.setEndpoint("s3-" + workS3BucketRegion + ".amazonaws.com");
         }
     }
 
@@ -273,7 +271,12 @@ public static boolean downloadFileIfChangedSince(String bucketName, String bucke
             }
 
             if(bucketFileRegion != null && !bucketFileRegion.isEmpty()) {
-                s3Client.setEndpoint("s3-" + bucketFileRegion + ".amazonaws.com");
+                if("us-east-1".equals(bucketFileRegion)) {
+                    s3Client.setEndpoint("s3.amazonaws.com");
+                }
+                else {
+                    s3Client.setEndpoint("s3-" + bucketFileRegion + ".amazonaws.com");
+                }
             }
 
             ObjectMetadata metadata = s3Client.getObjectMetadata(bucketName, bucketFilePrefix + file.getName());
diff --git a/src/java/com/netflix/ice/common/Config.java b/src/java/com/netflix/ice/common/Config.java
index 73992e03..6d7dfbfb 100644
--- a/src/java/com/netflix/ice/common/Config.java
+++ b/src/java/com/netflix/ice/common/Config.java
@@ -26,6 +26,7 @@
 public abstract class Config {
 
     public final String workS3BucketName;
+    public final String workS3BucketRegion;
     public final String workS3BucketPrefix;
     public final String localDir;
     public final AccountService accountService;
@@ -56,6 +57,17 @@ public Config(
 
         DateTime startDate = new DateTime(Long.parseLong(properties.getProperty(IceOptions.START_MILLIS)), DateTimeZone.UTC);
         workS3BucketName = properties.getProperty(IceOptions.WORK_S3_BUCKET_NAME);
+        
+        String defaultRegion = properties.getProperty(IceOptions.BILLING_S3_BUCKET_REGION); 
+        if (defaultRegion == null || defaultRegion.isEmpty()) throw new IllegalArgumentException("IceOptions.BILLING_S3_BUCKET_REGION must be specified");
+        
+        String bucketRegion = properties.getProperty(IceOptions.WORK_S3_BUCKET_REGION, defaultRegion);
+        if (bucketRegion.isEmpty()) bucketRegion = defaultRegion;
+        if (bucketRegion.contains(",")) {
+             bucketRegion = bucketRegion.substring(0, bucketRegion.indexOf(","));
+        }
+        workS3BucketRegion = bucketRegion;
+
         workS3BucketPrefix = properties.getProperty(IceOptions.WORK_S3_BUCKET_PREFIX, "ice/");
         localDir = properties.getProperty(IceOptions.LOCAL_DIR, "/mnt/ice");
 
@@ -67,6 +79,6 @@ public Config(
         this.productService = productService;
         this.resourceService = resourceService;
 
-        AwsUtils.init(credentialsProvider);
+        AwsUtils.init(credentialsProvider, workS3BucketRegion);
     }
 }
diff --git a/src/java/com/netflix/ice/common/IceOptions.java b/src/java/com/netflix/ice/common/IceOptions.java
index bfb1ee87..3282d610 100644
--- a/src/java/com/netflix/ice/common/IceOptions.java
+++ b/src/java/com/netflix/ice/common/IceOptions.java
@@ -95,6 +95,12 @@ public class IceOptions {
      */
     public static final String WORK_S3_BUCKET_NAME = "ice.work_s3bucketname";
 
+     /**
+     * Region for output files s3 bucket. It should be specified for buckets using v4 validation.
+     * It must be specified in Config.
+     */
+    public static final String WORK_S3_BUCKET_REGION = "ice.work_s3bucketregion";
+
     /**
      * Prefix of output files in output s3 bucket. It must be specified in Config.
      */
diff --git a/src/java/sample.properties b/src/java/sample.properties
index e5b7077a..a9e94973 100644
--- a/src/java/sample.properties
+++ b/src/java/sample.properties
@@ -54,6 +54,8 @@ ice.companyName=Your Company Name
 
 # s3 bucket name where Ice can store output files. Ice must have read and write access to billing s3 bucket.
 ice.work_s3bucketname=work_s3bucketname
+# location for the output files bucket. The working bucket takes the same region than the first billing bucket if unspecified.
+#ice.work_s3bucketregion=eu-east-1
 # prefix of Ice output files
 ice.work_s3bucketprefix=ice/