diff --git a/commands/sandbox/create.ts b/commands/sandbox/create.ts
index d277adacd..33dbb1314 100644
--- a/commands/sandbox/create.ts
+++ b/commands/sandbox/create.ts
@@ -141,12 +141,7 @@ exports.handler = async options => {
     const sandboxAccountConfig = getAccountConfig(result.sandbox.sandboxHubId);
     // For v1 sandboxes, keep sync here. Once we migrate to v2, this will be handled by BE automatically
     const handleSyncSandbox = async syncTasks => {
-      await syncSandbox({
-        accountConfig: sandboxAccountConfig,
-        parentAccountConfig: accountConfig,
-        env,
-        syncTasks,
-      });
+      await syncSandbox(sandboxAccountConfig, accountConfig, env, syncTasks);
     };
     try {
       let availableSyncTasks = await getAvailableSyncTypes(
diff --git a/lib/localDev.ts b/lib/localDev.ts
index 0f9d7ebd2..20d5b02b9 100644
--- a/lib/localDev.ts
+++ b/lib/localDev.ts
@@ -223,13 +223,13 @@ const createSandboxForLocalDev = async (accountId, accountConfig, env) => {
       sandboxAccountConfig
     );
     // For v1 sandboxes, keep sync here. Once we migrate to v2, this will be handled by BE automatically
-    await syncSandbox({
-      accountConfig: sandboxAccountConfig,
-      parentAccountConfig: accountConfig,
+    await syncSandbox(
+      sandboxAccountConfig,
+      accountConfig,
       env,
       syncTasks,
-      slimInfoMessage: true,
-    });
+      true
+    );
     return targetAccountId;
   } catch (err) {
     logError(err);
diff --git a/lib/sandboxSync.ts b/lib/sandboxSync.ts
index 0b6587d3b..2fc927f5e 100644
--- a/lib/sandboxSync.ts
+++ b/lib/sandboxSync.ts
@@ -1,50 +1,50 @@
-// @ts-nocheck
-const SpinniesManager = require('./ui/SpinniesManager');
-const { getHubSpotWebsiteOrigin } = require('@hubspot/local-dev-lib/urls');
-const { logger } = require('@hubspot/local-dev-lib/logger');
-const { i18n } = require('./lang');
-const { getAvailableSyncTypes } = require('./sandboxes');
-const { initiateSync } = require('@hubspot/local-dev-lib/api/sandboxSync');
-const {
-  debugError,
-  logError,
-  ApiErrorContext,
-} = require('./errorHandlers/index');
-const { isSpecifiedError } = require('@hubspot/local-dev-lib/errors/index');
-const { getSandboxTypeAsString } = require('./sandboxes');
-const { getAccountId } = require('@hubspot/local-dev-lib/config');
-const {
-  getAccountIdentifier,
-} = require('@hubspot/local-dev-lib/config/getAccountIdentifier');
-const {
+import SpinniesManager from './ui/SpinniesManager';
+import { getHubSpotWebsiteOrigin } from '@hubspot/local-dev-lib/urls';
+import { logger } from '@hubspot/local-dev-lib/logger';
+import { initiateSync } from '@hubspot/local-dev-lib/api/sandboxSync';
+import { isSpecifiedError } from '@hubspot/local-dev-lib/errors/index';
+import { getAccountId } from '@hubspot/local-dev-lib/config';
+import { getAccountIdentifier } from '@hubspot/local-dev-lib/config/getAccountIdentifier';
+import { CLIAccount } from '@hubspot/local-dev-lib/types/Accounts';
+import { Environment } from '@hubspot/local-dev-lib/types/Config';
+
+import { i18n } from './lang';
+import { getAvailableSyncTypes } from './sandboxes';
+import { debugError, logError, ApiErrorContext } from './errorHandlers/index';
+import { getSandboxTypeAsString } from './sandboxes';
+import {
   uiAccountDescription,
   uiLine,
   uiLink,
   uiCommandDisabledBanner,
-} = require('./ui');
-const { isDevelopmentSandbox } = require('./accountTypes');
+} from './ui';
+import { isDevelopmentSandbox } from './accountTypes';
+import { SandboxSyncTask } from '../types/Sandboxes';
 
 const i18nKey = 'lib.sandbox.sync';
 
-/**
- * @param {Object} accountConfig - Account config of sandbox portal
- * @param {Object} parentAccountConfig - Account config of parent portal
- * @param {String} env - Environment (QA/Prod)
- * @param {Array} syncTasks - Array of available sync tasks
- * @returns
- */
-const syncSandbox = async ({
-  accountConfig,
-  parentAccountConfig,
-  env,
-  syncTasks,
-  slimInfoMessage = false,
-}) => {
+export async function syncSandbox(
+  accountConfig: CLIAccount,
+  parentAccountConfig: CLIAccount,
+  env: Environment,
+  syncTasks: Array<SandboxSyncTask>,
+  slimInfoMessage = false
+) {
   const id = getAccountIdentifier(accountConfig);
   const accountId = getAccountId(id);
   const parentId = getAccountIdentifier(parentAccountConfig);
   const parentAccountId = getAccountId(parentId);
   const isDevSandbox = isDevelopmentSandbox(accountConfig);
+
+  if (!accountId || !parentAccountId) {
+    throw new Error(
+      i18n(`${i18nKey}.failure.invalidUser`, {
+        accountName: uiAccountDescription(accountId),
+        parentAccountName: uiAccountDescription(parentAccountId),
+      })
+    );
+  }
+
   SpinniesManager.init({
     succeedColor: 'white',
   });
@@ -190,8 +190,4 @@ const syncSandbox = async ({
     uiLine();
     logger.log();
   }
-};
-
-module.exports = {
-  syncSandbox,
-};
+}
diff --git a/lib/sandboxes.ts b/lib/sandboxes.ts
index c05d97bfb..229362fd2 100644
--- a/lib/sandboxes.ts
+++ b/lib/sandboxes.ts
@@ -15,11 +15,12 @@ import {
 } from '@hubspot/local-dev-lib/errors/index';
 import { getValidEnv } from '@hubspot/local-dev-lib/environment';
 import { AccountType, CLIAccount } from '@hubspot/local-dev-lib/types/Accounts';
+import { Environment } from '@hubspot/local-dev-lib/types/Config';
 
 import { i18n } from './lang';
 import { uiAccountDescription } from './ui';
 import { logError } from './errorHandlers/index';
-import { Environment } from '@hubspot/local-dev-lib/types/Config';
+import { SandboxSyncTask } from '../types/Sandboxes';
 
 const i18nKey = 'lib.sandbox';
 
@@ -39,7 +40,7 @@ export const SANDBOX_API_TYPE_MAP = {
   [HUBSPOT_ACCOUNT_TYPES.DEVELOPMENT_SANDBOX]: 2,
 } as const;
 
-export function getSandboxTypeAsString(accountType: AccountType): string {
+export function getSandboxTypeAsString(accountType?: AccountType): string {
   if (accountType === HUBSPOT_ACCOUNT_TYPES.DEVELOPMENT_SANDBOX) {
     return 'development'; // Only place we're using this specific name
   }
@@ -89,7 +90,7 @@ function getSandboxLimit(error: unknown): number {
 export async function getAvailableSyncTypes(
   parentAccountConfig: CLIAccount,
   config: CLIAccount
-): Promise<Array<{ type: string }>> {
+): Promise<Array<SandboxSyncTask>> {
   const parentId = getAccountIdentifier(parentAccountConfig);
   const parentPortalId = getAccountId(parentId);
   const id = getAccountIdentifier(config);
diff --git a/types/Sandboxes.ts b/types/Sandboxes.ts
new file mode 100644
index 000000000..3b58ecfc5
--- /dev/null
+++ b/types/Sandboxes.ts
@@ -0,0 +1,3 @@
+export type SandboxSyncTask = {
+  type: string;
+};