diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
index 73708a72f5..fb3cc622e4 100644
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -1640,9 +1640,11 @@ phutil_register_library_map(array(
     'PhabricatorStandardCustomFieldDate' => 'infrastructure/customfield/standard/PhabricatorStandardCustomFieldDate.php',
     'PhabricatorStandardCustomFieldInt' => 'infrastructure/customfield/standard/PhabricatorStandardCustomFieldInt.php',
     'PhabricatorStandardCustomFieldInterface' => 'infrastructure/customfield/interface/PhabricatorStandardCustomFieldInterface.php',
+    'PhabricatorStandardCustomFieldPHIDs' => 'infrastructure/customfield/standard/PhabricatorStandardCustomFieldPHIDs.php',
     'PhabricatorStandardCustomFieldRemarkup' => 'infrastructure/customfield/standard/PhabricatorStandardCustomFieldRemarkup.php',
     'PhabricatorStandardCustomFieldSelect' => 'infrastructure/customfield/standard/PhabricatorStandardCustomFieldSelect.php',
     'PhabricatorStandardCustomFieldText' => 'infrastructure/customfield/standard/PhabricatorStandardCustomFieldText.php',
+    'PhabricatorStandardCustomFieldUsers' => 'infrastructure/customfield/standard/PhabricatorStandardCustomFieldUsers.php',
     'PhabricatorStandardPageView' => 'view/page/PhabricatorStandardPageView.php',
     'PhabricatorStatusController' => 'applications/system/PhabricatorStatusController.php',
     'PhabricatorStorageFixtureScopeGuard' => 'infrastructure/testing/fixture/PhabricatorStorageFixtureScopeGuard.php',
@@ -3792,9 +3794,11 @@ phutil_register_library_map(array(
     'PhabricatorStandardCustomFieldBool' => 'PhabricatorStandardCustomField',
     'PhabricatorStandardCustomFieldDate' => 'PhabricatorStandardCustomField',
     'PhabricatorStandardCustomFieldInt' => 'PhabricatorStandardCustomField',
+    'PhabricatorStandardCustomFieldPHIDs' => 'PhabricatorStandardCustomField',
     'PhabricatorStandardCustomFieldRemarkup' => 'PhabricatorStandardCustomField',
     'PhabricatorStandardCustomFieldSelect' => 'PhabricatorStandardCustomField',
     'PhabricatorStandardCustomFieldText' => 'PhabricatorStandardCustomField',
+    'PhabricatorStandardCustomFieldUsers' => 'PhabricatorStandardCustomFieldPHIDs',
     'PhabricatorStandardPageView' => 'PhabricatorBarePageView',
     'PhabricatorStatusController' => 'PhabricatorController',
     'PhabricatorStorageManagementDatabasesWorkflow' => 'PhabricatorStorageManagementWorkflow',
diff --git a/src/applications/people/query/PhabricatorPeopleQuery.php b/src/applications/people/query/PhabricatorPeopleQuery.php
index 3bdfdb1a4c..1f0c12bfc0 100644
--- a/src/applications/people/query/PhabricatorPeopleQuery.php
+++ b/src/applications/people/query/PhabricatorPeopleQuery.php
@@ -105,8 +105,8 @@ final class PhabricatorPeopleQuery
       $table->getTableName(),
       $this->buildJoinsClause($conn_r),
       $this->buildWhereClause($conn_r),
-      $this->buildOrderClause($conn_r),
       $this->buildApplicationSearchGroupClause($conn_r),
+      $this->buildOrderClause($conn_r),
       $this->buildLimitClause($conn_r));
 
     if ($this->needPrimaryEmail) {
diff --git a/src/applications/search/engine/PhabricatorApplicationSearchEngine.php b/src/applications/search/engine/PhabricatorApplicationSearchEngine.php
index 74496d9cf7..70cc7536ec 100644
--- a/src/applications/search/engine/PhabricatorApplicationSearchEngine.php
+++ b/src/applications/search/engine/PhabricatorApplicationSearchEngine.php
@@ -504,7 +504,7 @@ abstract class PhabricatorApplicationSearchEngine {
     $handles = array();
     if ($all_phids) {
       $handles = id(new PhabricatorHandleQuery())
-        ->setViewer($this->getViewer())
+        ->setViewer($this->requireViewer())
         ->withPHIDs($all_phids)
         ->execute();
     }
diff --git a/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldPHIDs.php b/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldPHIDs.php
new file mode 100644
index 0000000000..755f4fcdc1
--- /dev/null
+++ b/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldPHIDs.php
@@ -0,0 +1,89 @@
+<?php
+
+/**
+ * Common code for standard field types which store lists of PHIDs.
+ */
+abstract class PhabricatorStandardCustomFieldPHIDs
+  extends PhabricatorStandardCustomField {
+
+  public function buildFieldIndexes() {
+    $indexes = array();
+
+    $value = $this->getFieldValue();
+    if (is_array($value)) {
+      foreach ($value as $phid) {
+        $indexes[] = $this->newStringIndex($phid);
+      }
+    }
+
+    return $indexes;
+  }
+
+  public function readValueFromRequest(AphrontRequest $request) {
+    $value = $request->getArr($this->getFieldKey());
+    $this->setFieldValue($value);
+  }
+
+  public function getValueForStorage() {
+    $value = $this->getFieldValue();
+    if (!$value) {
+      return null;
+    }
+
+    return json_encode(array_values($value));
+  }
+
+  public function setValueFromStorage($value) {
+    $result = array();
+    if ($value) {
+      $value = json_decode($value, true);
+      if (is_array($value)) {
+        $result = array_values($value);
+      }
+    }
+    $this->setFieldValue($value);
+  }
+
+  public function readApplicationSearchValueFromRequest(
+    PhabricatorApplicationSearchEngine $engine,
+    AphrontRequest $request) {
+    return $request->getArr($this->getFieldKey());
+  }
+
+  public function applyApplicationSearchConstraintToQuery(
+    PhabricatorApplicationSearchEngine $engine,
+    PhabricatorCursorPagedPolicyAwareQuery $query,
+    $value) {
+    if ($value) {
+      $query->withApplicationSearchContainsConstraint(
+        $this->newStringIndex(null),
+        $value);
+    }
+  }
+
+  public function getRequiredHandlePHIDsForApplicationSearch($value) {
+    if ($value) {
+      return $value;
+    }
+    return array();
+  }
+
+  public function renderPropertyViewValue() {
+    $value = $this->getFieldValue();
+    if (!$value) {
+      return null;
+    }
+
+    // TODO: Surface and batch this.
+
+    $handles = id(new PhabricatorHandleQuery())
+      ->setViewer($this->getViewer())
+      ->withPHIDs($value)
+      ->execute();
+
+    $handles = mpull($handles, 'renderLink');
+    $handles = phutil_implode_html(', ', $handles);
+    return $handles;
+  }
+
+}
diff --git a/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldUsers.php b/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldUsers.php
new file mode 100644
index 0000000000..135db3b1d3
--- /dev/null
+++ b/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldUsers.php
@@ -0,0 +1,52 @@
+<?php
+
+final class PhabricatorStandardCustomFieldUsers
+  extends PhabricatorStandardCustomFieldPHIDs {
+
+  public function getFieldType() {
+    return 'users';
+  }
+
+  public function renderEditControl() {
+    $handles = array();
+    $value = $this->getFieldValue();
+    if ($value) {
+
+      // TODO: Surface and batch.
+
+      $handles = id(new PhabricatorHandleQuery())
+        ->setViewer($this->getViewer())
+        ->withPHIDs($value)
+        ->execute();
+    }
+
+    $control = id(new AphrontFormTokenizerControl())
+      ->setLabel($this->getFieldName())
+      ->setName($this->getFieldKey())
+      ->setDatasource('/typeahead/common/accounts/')
+      ->setValue($handles);
+
+    $limit = $this->getFieldConfigValue('limit');
+    if ($limit) {
+      $control->setLimit($limit);
+    }
+
+    return $control;
+  }
+
+  public function appendToApplicationSearchForm(
+    PhabricatorApplicationSearchEngine $engine,
+    AphrontFormView $form,
+    $value,
+    array $handles) {
+
+    $control = id(new AphrontFormTokenizerControl())
+      ->setLabel($this->getFieldName())
+      ->setName($this->getFieldKey())
+      ->setDatasource('/typeahead/common/accounts/')
+      ->setValue($handles);
+
+    $form->appendChild($control);
+  }
+
+}