diff --git a/src/applications/harbormaster/controller/HarbormasterBuildActionController.php b/src/applications/harbormaster/controller/HarbormasterBuildActionController.php
--- a/src/applications/harbormaster/controller/HarbormasterBuildActionController.php
+++ b/src/applications/harbormaster/controller/HarbormasterBuildActionController.php
@@ -39,6 +39,8 @@
         return new Aphront400Response();
     }
 
+    $build->assertCanIssueCommand($viewer, $action);
+
     switch ($via) {
       case 'buildable':
         $return_uri = '/'.$build->getBuildable()->getMonogram();
diff --git a/src/applications/harbormaster/controller/HarbormasterBuildViewController.php b/src/applications/harbormaster/controller/HarbormasterBuildViewController.php
--- a/src/applications/harbormaster/controller/HarbormasterBuildViewController.php
+++ b/src/applications/harbormaster/controller/HarbormasterBuildViewController.php
@@ -441,10 +441,29 @@
       ->setUser($viewer)
       ->setObject($build);
 
-    $can_restart = $build->canRestartBuild();
-    $can_pause = $build->canPauseBuild();
-    $can_resume = $build->canResumeBuild();
-    $can_abort = $build->canAbortBuild();
+    $can_restart =
+      $build->canRestartBuild() &&
+      $build->canIssueCommand(
+        $viewer,
+        HarbormasterBuildCommand::COMMAND_RESTART);
+
+    $can_pause =
+      $build->canPauseBuild() &&
+      $build->canIssueCommand(
+        $viewer,
+        HarbormasterBuildCommand::COMMAND_PAUSE);
+
+    $can_resume =
+      $build->canResumeBuild() &&
+      $build->canIssueCommand(
+        $viewer,
+        HarbormasterBuildCommand::COMMAND_RESUME);
+
+    $can_abort =
+      $build->canAbortBuild() &&
+      $build->canIssueCommand(
+        $viewer,
+        HarbormasterBuildCommand::COMMAND_ABORT);
 
     $list->addAction(
       id(new PhabricatorActionView())
diff --git a/src/applications/harbormaster/controller/HarbormasterBuildableActionController.php b/src/applications/harbormaster/controller/HarbormasterBuildableActionController.php
--- a/src/applications/harbormaster/controller/HarbormasterBuildableActionController.php
+++ b/src/applications/harbormaster/controller/HarbormasterBuildableActionController.php
@@ -51,6 +51,14 @@
       }
     }
 
+    $restricted = false;
+    foreach ($issuable as $key => $build) {
+      if (!$build->canIssueCommand($viewer, $action)) {
+        $restricted = true;
+        unset($issuable[$key]);
+      }
+    }
+
     $return_uri = '/'.$buildable->getMonogram();
     if ($request->isDialogFormPost() && $issuable) {
       $editor = id(new HarbormasterBuildableTransactionEditor())
@@ -84,49 +92,101 @@
     switch ($action) {
       case HarbormasterBuildCommand::COMMAND_RESTART:
         if ($issuable) {
-          $title = pht('Really restart all builds?');
-          $body = pht(
-            'Progress on all builds will be discarded, and all builds will '.
-            'restart. Side effects of the builds will occur again. Really '.
-            'restart all builds?');
-          $submit = pht('Restart All Builds');
+          $title = pht('Really restart builds?');
+
+          if ($restricted) {
+            $body = pht(
+              'You only have permission to restart some builds. Progress '.
+              'on builds you have permission to restart will be discarded '.
+              'and they will restart. Side effects of these builds will '.
+              'occur again. Really restart all builds?');
+          } else {
+            $body = pht(
+              'Progress on all builds will be discarded, and all builds will '.
+              'restart. Side effects of the builds will occur again. Really '.
+              'restart all builds?');
+          }
+
+          $submit = pht('Restart Builds');
         } else {
           $title = pht('Unable to Restart Builds');
-          $body = pht('No builds can be restarted.');
+
+          if ($restricted) {
+            $body = pht('You do not have permission to restart any builds.');
+          } else {
+            $body = pht('No builds can be restarted.');
+          }
         }
         break;
       case HarbormasterBuildCommand::COMMAND_PAUSE:
         if ($issuable) {
-          $title = pht('Really pause all builds?');
-          $body = pht(
-            'If you pause all builds, work will halt once the current steps '.
-            'complete. You can resume the builds later.');
-          $submit = pht('Pause All Builds');
+          $title = pht('Really pause builds?');
+
+          if ($restricted) {
+            $body = pht(
+              'You only have permission to pause some builds. Once the '.
+              'current steps complete, work will halt on builds you have '.
+              'permission to pause. You can resume the builds later.');
+          } else {
+            $body = pht(
+              'If you pause all builds, work will halt once the current steps '.
+              'complete. You can resume the builds later.');
+          }
+          $submit = pht('Pause Builds');
         } else {
           $title = pht('Unable to Pause Builds');
-          $body = pht('No builds can be paused.');
+
+          if ($restricted) {
+            $body = pht('You do not have permission to pause any builds.');
+          } else {
+            $body = pht('No builds can be paused.');
+          }
         }
         break;
       case HarbormasterBuildCommand::COMMAND_ABORT:
         if ($issuable) {
-          $title = pht('Really abort all builds?');
-          $body = pht(
-            'If you abort all builds, work will halt immediately. Work '.
-            'will be discarded, and builds must be completely restarted.');
-          $submit = pht('Abort All Builds');
+          $title = pht('Really abort builds?');
+          if ($restricted) {
+            $body = pht(
+              'You only have permission to abort some builds. Work will '.
+              'halt immediately on builds you have permission to abort. '.
+              'Progress will be discarded, and builds must be completely '.
+              'restarted if you want them to complete.');
+          } else {
+            $body = pht(
+              'If you abort all builds, work will halt immediately. Work '.
+              'will be discarded, and builds must be completely restarted.');
+          }
+          $submit = pht('Abort Builds');
         } else {
           $title = pht('Unable to Abort Builds');
-          $body = pht('No builds can be aborted.');
+
+          if ($restricted) {
+            $body = pht('You do not have permission to abort any builds.');
+          } else {
+            $body = pht('No builds can be aborted.');
+          }
         }
         break;
       case HarbormasterBuildCommand::COMMAND_RESUME:
         if ($issuable) {
-          $title = pht('Really resume all builds?');
-          $body = pht('Work will continue on all builds. Really resume?');
-          $submit = pht('Resume All Builds');
+          $title = pht('Really resume builds?');
+          if ($restricted) {
+            $body = pht(
+              'You only have permission to resume some builds. Work will '.
+              'continue on builds you have permission to resume.');
+          } else {
+            $body = pht('Work will continue on all builds. Really resume?');
+          }
+
+          $submit = pht('Resume Builds');
         } else {
           $title = pht('Unable to Resume Builds');
-          $body = pht('No builds can be resumed.');
+          if ($restricted) {
+            $body = pht('You do not have permission to resume any builds.');
+          } else {
+            $body = pht('No builds can be resumed.');
+          }
         }
         break;
     }
diff --git a/src/applications/harbormaster/controller/HarbormasterBuildableViewController.php b/src/applications/harbormaster/controller/HarbormasterBuildableViewController.php
--- a/src/applications/harbormaster/controller/HarbormasterBuildableViewController.php
+++ b/src/applications/harbormaster/controller/HarbormasterBuildableViewController.php
@@ -86,18 +86,31 @@
     $can_pause = false;
     $can_abort = false;
 
+    $command_restart = HarbormasterBuildCommand::COMMAND_RESTART;
+    $command_resume = HarbormasterBuildCommand::COMMAND_RESUME;
+    $command_pause = HarbormasterBuildCommand::COMMAND_PAUSE;
+    $command_abort = HarbormasterBuildCommand::COMMAND_ABORT;
+
     foreach ($buildable->getBuilds() as $build) {
       if ($build->canRestartBuild()) {
-        $can_restart = true;
+        if ($build->canIssueCommand($viewer, $command_restart)) {
+          $can_restart = true;
+        }
       }
       if ($build->canResumeBuild()) {
-        $can_resume = true;
+        if ($build->canIssueCommand($viewer, $command_resume)) {
+          $can_resume = true;
+        }
       }
       if ($build->canPauseBuild()) {
-        $can_pause = true;
+        if ($build->canIssueCommand($viewer, $command_pause)) {
+          $can_pause = true;
+        }
       }
       if ($build->canAbortBuild()) {
-        $can_abort = true;
+        if ($build->canIssueCommand($viewer, $command_abort)) {
+          $can_abort = true;
+        }
       }
     }
 
diff --git a/src/applications/harbormaster/editor/HarbormasterBuildTransactionEditor.php b/src/applications/harbormaster/editor/HarbormasterBuildTransactionEditor.php
--- a/src/applications/harbormaster/editor/HarbormasterBuildTransactionEditor.php
+++ b/src/applications/harbormaster/editor/HarbormasterBuildTransactionEditor.php
@@ -88,6 +88,11 @@
       return;
     }
 
+    $actor = $this->getActor();
+    if (!$build->canIssueCommand($actor, $command)) {
+      return;
+    }
+
     id(new HarbormasterBuildCommand())
       ->setAuthorPHID($xaction->getAuthorPHID())
       ->setTargetPHID($build->getPHID())
diff --git a/src/applications/harbormaster/storage/build/HarbormasterBuild.php b/src/applications/harbormaster/storage/build/HarbormasterBuild.php
--- a/src/applications/harbormaster/storage/build/HarbormasterBuild.php
+++ b/src/applications/harbormaster/storage/build/HarbormasterBuild.php
@@ -450,6 +450,42 @@
     return $this;
   }
 
+  public function canIssueCommand(PhabricatorUser $viewer, $command) {
+    try {
+      $this->assertCanIssueCommand($viewer, $command);
+      return true;
+    } catch (Exception $ex) {
+      return false;
+    }
+  }
+
+  public function assertCanIssueCommand(PhabricatorUser $viewer, $command) {
+    $need_edit = false;
+    switch ($command) {
+      case HarbormasterBuildCommand::COMMAND_RESTART:
+        break;
+      case HarbormasterBuildCommand::COMMAND_PAUSE:
+      case HarbormasterBuildCommand::COMMAND_RESUME:
+      case HarbormasterBuildCommand::COMMAND_ABORT:
+        $need_edit = true;
+        break;
+      default:
+        throw new Exception(
+          pht(
+            'Invalid Harbormaster build command "%s".',
+            $command));
+    }
+
+    // Issuing these commands requires that you be able to edit the build, to
+    // prevent enemy engineers from sabotaging your builds. See T9614.
+    if ($need_edit) {
+      PhabricatorPolicyFilter::requireCapability(
+        $viewer,
+        $this->getBuildPlan(),
+        PhabricatorPolicyCapability::CAN_EDIT);
+    }
+  }
+
 
 /* -(  PhabricatorApplicationTransactionInterface  )------------------------- */