diff --git a/package.json b/package.json
index 3ebd2e1..129a2db 100644
--- a/package.json
+++ b/package.json
@@ -3,6 +3,7 @@
   "version": "0.1.0",
   "private": true,
   "homepage": ".",
+  "proxy": "https://ccv-pubs.web.app/",
   "scripts": {
     "start": "react-scripts start",
     "build": "react-scripts build",
diff --git a/src/components/ContentPage.jsx b/src/components/ContentPage.jsx
index 2e1af69..02a1939 100755
--- a/src/components/ContentPage.jsx
+++ b/src/components/ContentPage.jsx
@@ -14,7 +14,7 @@ export function ContentPage() {
 
   return (
     <div className="main-content d-flex flex-column align-items-center">
-      {user ? (
+      {user?.ccv ? (
         <div className="align-self-end">
           <AddPublicationModal />
         </div>
diff --git a/src/utils/firebase.ts b/src/utils/firebase.ts
index f510031..21274c5 100644
--- a/src/utils/firebase.ts
+++ b/src/utils/firebase.ts
@@ -4,6 +4,7 @@ import { initializeApp } from 'firebase/app';
 import {
   getFirestore,
   doc,
+  getDoc,
   setDoc,
   collection,
   onSnapshot,
@@ -19,7 +20,8 @@ import {
   signOut,
 } from 'firebase/auth';
 
-import { setPublications, setUser } from '../store/slice/appState';
+import { setPublications, setUser as setUserState } from '../store/slice/appState';
+import { User } from '../../types';
 
 const firebaseConfig = {
   apiKey: 'AIzaSyBlu1GzA5jvM6mh6taIcjtNgcSEVxlxa1Q',
@@ -35,15 +37,50 @@ const app = initializeApp(firebaseConfig);
 const db = getFirestore(app);
 const auth = getAuth();
 const provider = new GoogleAuthProvider();
+provider.addScope('https://www.googleapis.com/auth/cloud-identity.groups.readonly');
 
 provider.setCustomParameters({
   hd: 'brown.edu',
 });
-const collectionName = 'publications';
+const publicationsCollection = 'publications';
+const usersCollection = 'users';
+const ccvStaffGoogleGroupId = '0184mhaj2thv9r6';
 
 export const handleLogin = async () => {
   try {
-    await signInWithPopup(auth, provider);
+    const result = await signInWithPopup(auth, provider);
+    const credential = GoogleAuthProvider.credentialFromResult(result);
+    const token = credential.accessToken;
+    const { displayName, email } = result.user;
+
+    // Fetch members from the CCV group
+    // If the user is in the group, we'll get back members. Otherwise, we'll get a permission error
+    // The access token is in scope here and I didn't want to save it anywhere
+    const response = await fetch(
+      `https://cloudidentity.googleapis.com/v1/groups/${ccvStaffGoogleGroupId}/memberships`,
+      {
+        headers: {
+          Authorization: `Bearer ${token}`,
+        },
+      }
+    );
+
+    let ccv = false;
+    if (response.ok) {
+      const { memberships } = (await response.json()) ?? [];
+
+      // Double check that the user is a member in the ccv group
+      ccv = memberships.some((m) => m.preferredMemberKey.id.toLowerCase() === email.toLowerCase());
+    }
+
+    const userDoc = await getUser(email);
+    if (!userDoc || userDoc.ccv !== ccv || userDoc.displayName !== displayName) {
+      await updateUser({
+        displayName,
+        email,
+        ccv,
+      });
+    }
   } catch (error) {
     console.log(error);
   }
@@ -64,24 +101,22 @@ export const useAuthStateChanged = () => {
   const dispatch = useDispatch();
 
   useEffect(() => {
-    const unsubscribe = onAuthStateChanged(auth, (user) => {
+    const unsubscribeAuth = onAuthStateChanged(auth, async (user) => {
       if (user) {
-        const { displayName, email, uid } = user;
-
-        dispatch(
-          setUser({
-            displayName,
-            email,
-            uid,
-          })
-        );
+        const { email } = user;
+        const unsubscribeUser = onSnapshot(doc(db, usersCollection, email), (doc) => {
+          if (doc.exists) {
+            dispatch(setUserState(doc.data()));
+          }
+        });
+        return () => unsubscribeUser();
       } else {
-        dispatch(setUser(null));
+        dispatch(setUserState(null));
       }
     });
 
     return () => {
-      unsubscribe();
+      unsubscribeAuth();
     };
   }, [dispatch]);
 };
@@ -95,7 +130,7 @@ export const usePublicationsCollection = () => {
   useEffect(() => {
     const unsubscribe = onSnapshot(
       query(
-        collection(db, collectionName),
+        collection(db, publicationsCollection),
         orderBy('updatedAt', 'desc'),
         limit(100) // TODO: TEMPORARY. Limiting right now. Set up pagination?
       ),
@@ -116,10 +151,28 @@ export const usePublicationsCollection = () => {
 
 export const addPublication = async (publication) => {
   const docId = publication.doi.toLowerCase().replace(/\//g, '_');
-  const docRef = doc(db, collectionName, docId);
+  const docRef = doc(db, publicationsCollection, docId);
 
   await setDoc(docRef, {
     ...publication,
     updatedAt: Date.now(),
   });
 };
+
+const updateUser = async ({ displayName, email, ccv }) => {
+  const docRef = doc(db, usersCollection, email);
+
+  await setDoc(docRef, {
+    displayName,
+    email,
+    ccv,
+    updatedAt: Date.now(),
+  });
+};
+
+const getUser = async (email): Promise<User> => {
+  const docRef = doc(db, usersCollection, email);
+  const docSnap = await getDoc(docRef);
+
+  return docSnap.data() as User;
+};
diff --git a/types/index.d.ts b/types/index.d.ts
index b4f79f8..15c8ef4 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -8,3 +8,10 @@ export interface Publication {
   year: number;
   abstract: string;
 }
+
+export interface User {
+  displayName: string;
+  email: string;
+  ccv: boolean;
+  updatedAt: number;
+}