diff --git a/composer.json b/composer.json
index d2abd1385a82..36de436b07e0 100644
--- a/composer.json
+++ b/composer.json
@@ -114,4 +114,4 @@
             "entry": "ServiceBuilder.php"
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/BigQuery/BigQueryClient.php b/src/BigQuery/BigQueryClient.php
index 598f0f1f66fd..aa2e81fa3666 100644
--- a/src/BigQuery/BigQueryClient.php
+++ b/src/BigQuery/BigQueryClient.php
@@ -20,7 +20,6 @@
 use Google\Cloud\BigQuery\Connection\ConnectionInterface;
 use Google\Cloud\BigQuery\Connection\Rest;
 use Google\Cloud\BigQuery\Job;
-use Google\Cloud\Core\ArrayTrait;
 use Google\Cloud\Core\ClientTrait;
 use Google\Cloud\Core\ExponentialBackoff;
 use Google\Cloud\Core\Int64;
@@ -43,7 +42,6 @@
  */
 class BigQueryClient
 {
-    use ArrayTrait;
     use ClientTrait;
     use JobConfigurationTrait;
 
@@ -291,6 +289,8 @@ public function runQuery($query, array $options = [])
      *     @type array $jobConfig Configuration settings for a query job are
      *           outlined in the [API Docs for `configuration.query`](https://goo.gl/PuRa3I).
      *           If not provided default settings will be used.
+     *     @type string $jobIdPrefix [optional] If given, the returned job ID will
+     *           be of format `{$jobIdPrefix-}{jobId}`. **Defaults to** `null`.
      * }
      * @return Job
      */
diff --git a/src/BigQuery/JobConfigurationTrait.php b/src/BigQuery/JobConfigurationTrait.php
index 2a3829453b55..2ec37ca0be99 100644
--- a/src/BigQuery/JobConfigurationTrait.php
+++ b/src/BigQuery/JobConfigurationTrait.php
@@ -17,11 +17,16 @@
 
 namespace Google\Cloud\BigQuery;
 
+use Google\Cloud\Core\ArrayTrait;
+use Ramsey\Uuid\Uuid;
+
 /**
  * A trait used to build out configuration for jobs.
  */
 trait JobConfigurationTrait
 {
+    use ArrayTrait;
+
     /**
      * Builds a configuration for a job.
      *
@@ -33,6 +38,8 @@ trait JobConfigurationTrait
      */
     public function buildJobConfig($name, $projectId, array $config, array $userDefinedOptions)
     {
+        $jobIdPrefix = $this->pluck('jobIdPrefix', $userDefinedOptions, false);
+
         if (isset($userDefinedOptions['jobConfig'])) {
             $config = $userDefinedOptions['jobConfig'] + $config;
         }
@@ -41,9 +48,31 @@ public function buildJobConfig($name, $projectId, array $config, array $userDefi
 
         return [
             'projectId' => $projectId,
+            'jobReference' => [
+                'projectId' => $projectId,
+                'jobId' => $this->generateJobId($jobIdPrefix)
+            ],
             'configuration' => [
                 $name => $config
             ]
         ] + $userDefinedOptions;
     }
+
+    /**
+     * Generate a Job ID with an optional user-defined prefix.
+     *
+     * @param string $jobIdPrefix [optional] If given, the returned job ID will
+     *        be of format `{$jobIdPrefix-}{jobId}`. **Defaults to** `null`.
+     * @return string
+     */
+    protected function generateJobId($jobIdPrefix = null)
+    {
+        $jobId = '';
+
+        if ($jobIdPrefix) {
+            $jobId = $jobIdPrefix . '-';
+        }
+
+        return $jobId . Uuid::uuid4();
+    }
 }
diff --git a/src/BigQuery/Table.php b/src/BigQuery/Table.php
index 12e8c7de2687..b7749ffdea1a 100644
--- a/src/BigQuery/Table.php
+++ b/src/BigQuery/Table.php
@@ -18,7 +18,6 @@
 namespace Google\Cloud\BigQuery;
 
 use Google\Cloud\BigQuery\Connection\ConnectionInterface;
-use Google\Cloud\Core\ArrayTrait;
 use Google\Cloud\Core\ConcurrencyControlTrait;
 use Google\Cloud\Core\Exception\NotFoundException;
 use Google\Cloud\Core\Iterator\ItemIterator;
@@ -33,7 +32,6 @@
  */
 class Table
 {
-    use ArrayTrait;
     use ConcurrencyControlTrait;
     use JobConfigurationTrait;
 
@@ -239,6 +237,8 @@ function (array $row) use ($schema) {
      *     @type array $jobConfig Configuration settings for a copy job are
      *           outlined in the [API Docs for `configuration.copy`](https://goo.gl/m8dro9).
      *           If not provided default settings will be used.
+     *     @type string $jobIdPrefix [optional] If given, the returned job ID will
+     *           be of format `{$jobIdPrefix-}{jobId}`. **Defaults to** `null`.
      * }
      * @return Job
      */
@@ -287,6 +287,8 @@ public function copy(Table $destination, array $options = [])
      *     @type array $jobConfig Configuration settings for an extract job are
      *           outlined in the [API Docs for `configuration.extract`](https://goo.gl/SQ9XAE).
      *           If not provided default settings will be used.
+     *     @type string $jobIdPrefix [optional] If given, the returned job ID will
+     *           be of format `{$jobIdPrefix-}{jobId}`. **Defaults to** `null`.
      * }
      * @return Job
      */
@@ -334,6 +336,8 @@ public function export($destination, array $options = [])
      *     @type array $jobConfig Configuration settings for a load job are
      *           outlined in the [API Docs for `configuration.load`](https://goo.gl/j6jyHv).
      *           If not provided default settings will be used.
+     *     @type string $jobIdPrefix [optional] If given, the returned job ID will
+     *           be of format `{$jobIdPrefix-}{jobId}`. **Defaults to** `null`.
      * }
      * @return Job
      */
diff --git a/src/BigQuery/composer.json b/src/BigQuery/composer.json
index 6eded48fdc12..cf54b78f6b6b 100644
--- a/src/BigQuery/composer.json
+++ b/src/BigQuery/composer.json
@@ -4,7 +4,8 @@
     "license": "Apache-2.0",
     "minimum-stability": "stable",
     "require": {
-        "google/cloud-core": "^1.0"
+        "google/cloud-core": "^1.0",
+        "ramsey/uuid": "~3"
     },
     "suggest": {
         "google/cloud-storage": "Makes it easier to load data from Cloud Storage into BigQuery"
diff --git a/tests/unit/BigQuery/BigQueryClientTest.php b/tests/unit/BigQuery/BigQueryClientTest.php
index 6fddc4bb132f..6a1edad3c270 100644
--- a/tests/unit/BigQuery/BigQueryClientTest.php
+++ b/tests/unit/BigQuery/BigQueryClientTest.php
@@ -34,8 +34,9 @@
  */
 class BigQueryClientTest extends \PHPUnit_Framework_TestCase
 {
+    const JOBID = 'myJobId';
+
     public $connection;
-    public $jobId = 'myJobId';
     public $projectId = 'myProjectId';
     public $datasetId = 'myDatasetId';
     public $client;
@@ -43,7 +44,7 @@ class BigQueryClientTest extends \PHPUnit_Framework_TestCase
     public function setUp()
     {
         $this->connection = $this->prophesize(ConnectionInterface::class);
-        $this->client = new BigQueryTestClient(['projectId' => $this->projectId]);
+        $this->client = \Google\Cloud\Dev\stub(BigQueryTestClient::class, ['options' => ['projectId' => $this->projectId]]);
     }
 
     /**
@@ -54,16 +55,16 @@ public function testRunsQuery($query, $options, $expected)
         $this->connection->query($expected)
             ->willReturn([
                 'jobReference' => [
-                    'jobId' => $this->jobId
+                    'jobId' => self::JOBID
                 ],
                 'jobComplete' => true
             ])
             ->shouldBeCalledTimes(1);
-        $this->client->setConnection($this->connection->reveal());
+        $this->client->___setProperty('connection', $this->connection->reveal());
         $queryResults = $this->client->runQuery($query, $options);
 
         $this->assertInstanceOf(QueryResults::class, $queryResults);
-        $this->assertEquals($this->jobId, $queryResults->identity()['jobId']);
+        $this->assertEquals(self::JOBID, $queryResults->identity()['jobId']);
     }
 
     /**
@@ -74,7 +75,7 @@ public function testRunsQueryWithRetry($query, $options, $expected)
         $this->connection->query($expected)
             ->willReturn([
                 'jobReference' => [
-                    'jobId' => $this->jobId
+                    'jobId' => self::JOBID
                 ],
                 'jobComplete' => false
             ])
@@ -83,17 +84,17 @@ public function testRunsQueryWithRetry($query, $options, $expected)
         $this->connection->getQueryResults(Argument::any())
             ->willReturn([
                 'jobReference' => [
-                    'jobId' => $this->jobId
+                    'jobId' => self::JOBID
                 ],
                 'jobComplete' => true
             ])
             ->shouldBeCalledTimes(1);
 
-        $this->client->setConnection($this->connection->reveal());
+        $this->client->___setProperty('connection', $this->connection->reveal());
         $queryResults = $this->client->runQuery($query, $options);
 
         $this->assertInstanceOf(QueryResults::class, $queryResults);
-        $this->assertEquals($this->jobId, $queryResults->identity()['jobId']);
+        $this->assertEquals(self::JOBID, $queryResults->identity()['jobId']);
     }
 
     /**
@@ -107,17 +108,22 @@ public function testRunsQueryAsJob($query, $options, $expected)
             'projectId' => $projectId,
             'configuration' => [
                 'query' => $expected
+            ],
+            'jobReference' => [
+                'projectId' => $projectId,
+                'jobId' => self::JOBID
             ]
         ])
             ->willReturn([
-                'jobReference' => ['jobId' => $this->jobId]
+                'jobReference' => ['jobId' => self::JOBID]
             ])
             ->shouldBeCalledTimes(1);
-        $this->client->setConnection($this->connection->reveal());
+
+        $this->client->___setProperty('connection', $this->connection->reveal());
         $job = $this->client->runQueryAsJob($query, $options);
 
         $this->assertInstanceOf(Job::class, $job);
-        $this->assertEquals($this->jobId, $job->id());
+        $this->assertEquals(self::JOBID, $job->id());
     }
 
     public function queryDataProvider()
@@ -193,8 +199,8 @@ public function queryDataProvider()
 
     public function testGetsJob()
     {
-        $this->client->setConnection($this->connection->reveal());
-        $this->assertInstanceOf(Job::class, $this->client->job($this->jobId));
+        $this->client->___setProperty('connection', $this->connection->reveal());
+        $this->assertInstanceOf(Job::class, $this->client->job(self::JOBID));
     }
 
     public function testGetsJobsWithNoResults()
@@ -203,7 +209,7 @@ public function testGetsJobsWithNoResults()
             ->willReturn([])
             ->shouldBeCalledTimes(1);
 
-        $this->client->setConnection($this->connection->reveal());
+        $this->client->___setProperty('connection', $this->connection->reveal());
         $jobs = iterator_to_array($this->client->jobs());
 
         $this->assertEmpty($jobs);
@@ -214,15 +220,15 @@ public function testGetsJobsWithoutToken()
         $this->connection->listJobs(['projectId' => $this->projectId])
             ->willReturn([
                 'jobs' => [
-                    ['jobReference' => ['jobId' => $this->jobId]]
+                    ['jobReference' => ['jobId' => self::JOBID]]
                 ]
             ])
             ->shouldBeCalledTimes(1);
 
-        $this->client->setConnection($this->connection->reveal());
+        $this->client->___setProperty('connection', $this->connection->reveal());
         $jobs = iterator_to_array($this->client->jobs());
 
-        $this->assertEquals($this->jobId, $jobs[0]->id());
+        $this->assertEquals(self::JOBID, $jobs[0]->id());
     }
 
     public function testGetsJobsWithToken()
@@ -241,19 +247,19 @@ public function testGetsJobsWithToken()
         ])
             ->willReturn([
                 'jobs' => [
-                    ['jobReference' => ['jobId' => $this->jobId]]
+                    ['jobReference' => ['jobId' => self::JOBID]]
                 ]
             ])->shouldBeCalledTimes(1);
 
-        $this->client->setConnection($this->connection->reveal());
+        $this->client->___setProperty('connection', $this->connection->reveal());
         $job = iterator_to_array($this->client->jobs());
 
-        $this->assertEquals($this->jobId, $job[1]->id());
+        $this->assertEquals(self::JOBID, $job[1]->id());
     }
 
     public function testGetsDataset()
     {
-        $this->client->setConnection($this->connection->reveal());
+        $this->client->___setProperty('connection', $this->connection->reveal());
         $this->assertInstanceOf(Dataset::class, $this->client->dataset($this->datasetId));
     }
 
@@ -263,7 +269,7 @@ public function testGetsDatasetsWithNoResults()
             ->willReturn([])
             ->shouldBeCalledTimes(1);
 
-        $this->client->setConnection($this->connection->reveal());
+        $this->client->___setProperty('connection', $this->connection->reveal());
         $datasets = iterator_to_array($this->client->datasets());
 
         $this->assertEmpty($datasets);
@@ -279,7 +285,7 @@ public function testGetsDatasetsWithoutToken()
             ])
             ->shouldBeCalledTimes(1);
 
-        $this->client->setConnection($this->connection->reveal());
+        $this->client->___setProperty('connection', $this->connection->reveal());
         $datasets = iterator_to_array($this->client->datasets());
 
         $this->assertEquals($this->datasetId, $datasets[0]->id());
@@ -303,7 +309,7 @@ public function testGetsDatasetsWithToken()
             )
             ->shouldBeCalledTimes(2);
 
-        $this->client->setConnection($this->connection->reveal());
+        $this->client->___setProperty('connection', $this->connection->reveal());
         $dataset = iterator_to_array($this->client->datasets());
 
         $this->assertEquals($this->datasetId, $dataset[1]->id());
@@ -318,7 +324,7 @@ public function testCreatesDataset()
                 ]
             ])
             ->shouldBeCalledTimes(1);
-        $this->client->setConnection($this->connection->reveal());
+        $this->client->___setProperty('connection', $this->connection->reveal());
 
         $dataset = $this->client->createDataset($this->datasetId, [
             'metadata' => [
@@ -360,8 +366,8 @@ public function testGetsTimestamp()
 
 class BigQueryTestClient extends BigQueryClient
 {
-    public function setConnection($connection)
+    protected function generateJobId($jobIdPrefix = null)
     {
-        $this->connection = $connection;
+        return $jobIdPrefix ? $jobIdPrefix . '-' . BigQueryClientTest::JOBID : BigQueryClientTest::JOBID;
     }
 }
diff --git a/tests/unit/BigQuery/JobConfigurationTraitTest.php b/tests/unit/BigQuery/JobConfigurationTraitTest.php
new file mode 100644
index 000000000000..22dd9c706306
--- /dev/null
+++ b/tests/unit/BigQuery/JobConfigurationTraitTest.php
@@ -0,0 +1,43 @@
+<?php
+/**
+ * Copyright 2017 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+namespace Google\Cloud\Tests\Unit\BigQuery;
+
+use Google\Cloud\BigQuery\JobConfigurationTrait;
+
+/**
+ * @group bigquery
+ */
+class JobConfigurationTraitTest extends \PHPUnit_Framework_TestCase
+{
+    private $trait;
+
+    public function setUp()
+    {
+        $this->trait = \Google\Cloud\Dev\impl(JobConfigurationTrait::class);
+    }
+
+    public function testGenerateJobId()
+    {
+        $this->assertTrue(is_string($this->trait->call('generateJobId')));
+    }
+
+    public function testGenerateJobIdWithPrefix()
+    {
+        $this->assertTrue(strpos($this->trait->call('generateJobId', ['foobar']), 'foobar-') === 0);
+    }
+}
diff --git a/tests/unit/BigQuery/TableTest.php b/tests/unit/BigQuery/TableTest.php
index 783c5d65dfd5..46110adb5dd7 100644
--- a/tests/unit/BigQuery/TableTest.php
+++ b/tests/unit/BigQuery/TableTest.php
@@ -33,6 +33,8 @@
  */
 class TableTest extends \PHPUnit_Framework_TestCase
 {
+    const JOBID = 'myJobId';
+
     public $connection;
     public $storageConnection;
     public $mapper;
@@ -58,7 +60,7 @@ class TableTest extends \PHPUnit_Framework_TestCase
     ];
     public $insertJobResponse = [
         'jobReference' => [
-            'jobId' => 'myJobId'
+            'jobId' => self::JOBID
         ]
     ];
 
@@ -80,7 +82,7 @@ public function getObject()
 
     public function getTable($connection, array $data = [], $tableId = null)
     {
-        return new Table(
+        return new TableStub(
             $connection->reveal(),
             $tableId ?: $this->tableId,
             $this->datasetId,
@@ -221,6 +223,10 @@ public function testRunsCopyJob()
                         'projectId' => $this->projectId
                     ]
                 ]
+            ],
+            'jobReference' => [
+                'projectId' => $this->projectId,
+                'jobId' => self::JOBID
             ]
         ];
         $this->connection->insertJob(Argument::exact($expectedArguments))
@@ -251,6 +257,10 @@ public function testRunsExportJob($destinationObject)
                         'projectId' => $this->projectId
                     ]
                 ]
+            ],
+            'jobReference' => [
+                'projectId' => $this->projectId,
+                'jobId' => self::JOBID
             ]
         ];
         $this->connection->insertJob(Argument::exact($expectedArguments))
@@ -295,6 +305,10 @@ public function testRunsLoadJob()
                         'projectId' => $this->projectId
                     ]
                 ]
+            ],
+            'jobReference' => [
+                'projectId' => $this->projectId,
+                'jobId' => self::JOBID
             ]
         ];
         $this->connection->insertJobUpload(Argument::exact($expectedArguments))
@@ -323,6 +337,10 @@ public function testRunsLoadJobFromStorage()
                         'projectId' => $this->projectId
                     ]
                 ]
+            ],
+            'jobReference' => [
+                'projectId' => $this->projectId,
+                'jobId' => self::JOBID
             ]
         ];
         $this->connection->insertJob(Argument::exact($expectedArguments))
@@ -439,3 +457,11 @@ public function testGetsIdentity()
         $this->assertEquals($this->projectId, $table->identity()['projectId']);
     }
 }
+
+class TableStub extends Table
+{
+    protected function generateJobId($jobIdPrefix = null)
+    {
+        return $jobIdPrefix ? $jobIdPrefix . '-' . BigQueryClientTest::JOBID : BigQueryClientTest::JOBID;
+    }
+}