diff --git a/app/app/project/modalServerToolsController.js b/app/app/project/modalServerToolsController.js
index fc4c7c9e..88a742a9 100644
--- a/app/app/project/modalServerToolsController.js
+++ b/app/app/project/modalServerToolsController.js
@@ -48,6 +48,15 @@ export class ModalServerToolsController {
     }
     if (vm.Message.showDebug()) vm.$log.debug('Project dir: ', vm.$scope.projectDir);
 
+    vm.$scope.numCores = vm.OsServer.getNumberCores();
+    vm.$scope.numWorkers = vm.Project.getNumberWorkers();
+
+  }
+
+  setNumWorkers(numWkrs){
+    // set this so OsServer can access it when starting local server
+    const vm = this;
+    vm.Project.setNumberWorkers(numWkrs);
   }
 
   getLocalServer() {
diff --git a/app/app/project/osServerService.js b/app/app/project/osServerService.js
index 921b46bf..ccbe0611 100644
--- a/app/app/project/osServerService.js
+++ b/app/app/project/osServerService.js
@@ -47,12 +47,12 @@ export class OsServer {
     vm.$translate = $translate;
     vm.toastr = toastr;
 
-    // set number of workers
+    // set number of workers from project.
     vm.numCores = os.cpus().length;
-    vm.numWorkers = 1;
-    if (vm.numCores) {
-      vm.numWorkers = vm.numCores == 1 ? 1 : (vm.numCores - 1);
-    }
+    vm.numWorkers = vm.Project.getNumberWorkers();
+    // if (vm.numCores) {
+    //   vm.numWorkers = vm.numCores == 1 ? 1 : (vm.numCores - 1);
+    // }
     vm.$log.info('Number of cores: ', vm.numCores);
     vm.$log.info('Number of workers set to: ', vm.numWorkers);
 
@@ -84,6 +84,7 @@ export class OsServer {
   initializeServer() {
     const vm = this;
     vm.numberDPsToDisplay = vm.Project.getNumberDPsToDisplay();
+    vm.numWorkers = vm.Project.getNumberWorkers();
     vm.localServerURL = 'http://localhost:8080';  // default URL.  will be reset when starting server
     vm.serverStatuses = {local: 'stopped', remote: 'stopped'};  // started, stopped, error?
     vm.analysisStatus = '';  // '', starting, started, in progress, queued, completed, error, canceled
@@ -263,9 +264,9 @@ export class OsServer {
 
   }
 
-  getNumWorkers() {
+  getNumberCores() {
     const vm = this;
-    return vm.numWorkers;
+    return vm.numCores;
   }
 
   getSelectedServerURL() {
@@ -535,6 +536,9 @@ export class OsServer {
     // See "https://github.com/NREL/OpenStudio-server/tree/dockerize-osw/server/spec/files/batch_datapoints" for test files
     const deferred = vm.$q.defer();
 
+    // refetch numWorkers in case it has changed in serverTools modal
+    vm.numWorkers = vm.Project.getNumberWorkers();
+
     // run META CLI will return status code: 0 = success, 1 = failure
     // start local server needs path to oscli (vm.cliPath)
     if (vm.platform == 'win32')
diff --git a/app/app/project/projectService.js b/app/app/project/projectService.js
index 85fef27e..001e361f 100644
--- a/app/app/project/projectService.js
+++ b/app/app/project/projectService.js
@@ -103,6 +103,7 @@ export class Project {
     vm.reportType = null;
     vm.runType = vm.runTypes[0];
     vm.samplingMethod = vm.samplingMethods[0];
+    vm.numberWorkers = null;
     vm.rubyMD5 = null;
     vm.mongoMD5 = null;
     vm.openstudioServerMD5 = null;
@@ -182,6 +183,7 @@ export class Project {
     vm.downloadOSM = true;
     vm.downloadZIP = true;
     vm.gemfile = false;
+    vm.numberWorkers = 1;
     vm.timeoutWorkflow = 28800;
     vm.timeoutUploadResults = 28800;
     vm.timeoutInitWorker = 28800;
@@ -284,6 +286,7 @@ export class Project {
         vm.datapoints = vm.pat.datapoints ? vm.pat.datapoints : vm.datapoints;
         vm.remoteSettings = vm.pat.remoteSettings ? vm.pat.remoteSettings : vm.remoteSettings;
         vm.serverScripts = vm.pat.serverScripts ? vm.pat.serverScripts : vm.serverScripts;
+        vm.numberWorkers = vm.pat.numberWorkers ? vm.pat.numberWorkers : vm.numberWorkers;
 
         // filesToInclude
         // convert paths to platform-specific delimiters
@@ -1562,6 +1565,7 @@ export class Project {
     vm.pat.openstudioServerMD5 = vm.openstudioServerMD5;
     vm.pat.openstudioCLIMD5 = vm.openstudioCLIMD5;
     vm.pat.openstudioMD5 = vm.openstudioMD5;
+    vm.pat.numberWorkers = vm.numberWorkers;
 
     // measures and options
     vm.pat.measures = vm.measures;
@@ -1782,6 +1786,16 @@ export class Project {
     return vm.numberDPsToDisplay;
   }
 
+  getNumberWorkers() {
+    const vm = this;
+    return vm.numberWorkers;
+  }
+
+  setNumberWorkers(num) {
+    const vm = this;
+    vm.numberWorkers = num;
+  }
+
   getSeedDir() {
     const vm = this;
     return vm.seedDir;
diff --git a/app/app/project/serverTools.html b/app/app/project/serverTools.html
index 9bd43e0c..8a973158 100644
--- a/app/app/project/serverTools.html
+++ b/app/app/project/serverTools.html
@@ -3,6 +3,11 @@ <h3 class="modal-title" translate>serverTools.title</h3>
 </div>
 
 <div class="modal-body">
+  <div class="col-sm-8 modal-text pad-bot-20">
+    <label class="medium-label" translate>serverTools.numberWorkers</label>
+    <input class="form-control" type="number" ng-model="numWorkers" ng-change="modal.setNumWorkers(numWorkers)">
+    <span translate>serverTools.numberCores</span>: {{numCores}}</span>
+  </div>
   <div class="row pad-bot-20">
     <div class="col-sm-12 modal-text" ng-if="projectDir != null">
       <button type="button" class="btn btn-success" ng-click="modal.startLocalServer()" translate>serverTools.start</button>
diff --git a/app/app/translations/en.js b/app/app/translations/en.js
index 611ac3a3..efe05949 100644
--- a/app/app/translations/en.js
+++ b/app/app/translations/en.js
@@ -61,7 +61,9 @@ export default {
     stop: 'Stop Local Server',
     ping: 'Ping Server and Set Status',
     viewServer: 'View Local Server',
-    noProject: 'You must open a project first'
+    noProject: 'You must open a project first',
+    numberWorkers: 'Number of Workers to use for Server',
+    numberCores: 'Total number of cores available on machine'
   },
   setMeasuresDir: {
     title: 'Set MyMeasures Directory',
diff --git a/app/app/translations/fr.js b/app/app/translations/fr.js
index 88d67a03..aeb36be5 100644
--- a/app/app/translations/fr.js
+++ b/app/app/translations/fr.js
@@ -61,7 +61,9 @@ export default {
     stop: 'Arrêter le serveur local',
     ping: 'Requête Ping au Serveur et définir l\'état',
     viewServer: 'View Local Server',
-    noProject: 'Vous devez d\'abord ouvrir un projet'
+    noProject: 'Vous devez d\'abord ouvrir un projet',
+    numberWorkers: 'Nombre de travailleurs à utiliser pour le serveur',
+    numberCores: 'Nombre total de coeurs disponibles sur la machine'
   },
   setMeasuresDir: {
     title: 'Répertoire de MesMesures',