diff --git a/backend/index.js b/backend/index.js
index 5670a27..0bf44a5 100644
--- a/backend/index.js
+++ b/backend/index.js
@@ -30,9 +30,11 @@ app.use('/', indexRoute);
 
 // "users"
 const usersIndexRoute = require('./routes/users/index')(sequelize);
+const usersFindRoute = require('./routes/users/find')(sequelize);
 const signUpRoute = require('./routes/users/signup')(sequelize);
 const signInRoute = require('./routes/users/signin')(sequelize);
 app.use('/users', usersIndexRoute);
+app.use('/users', usersFindRoute);
 app.use('/users', signUpRoute);
 app.use('/users', signInRoute);
 
diff --git a/backend/routes/members/new.js b/backend/routes/members/new.js
index bfdbf7b..b517d51 100644
--- a/backend/routes/members/new.js
+++ b/backend/routes/members/new.js
@@ -2,6 +2,7 @@ const express = require('express');
 const router = express.Router();
 const defineMember = require('../../models/members');
 const { DataTypes } = require('sequelize');
+const { memberRoles } = require('../../routes/users/authSettings');
 
 module.exports = function (sequelize) {
   const { verifySignedIn, verifyProjectManager } = require('../../middleware/auth')(sequelize);
@@ -24,9 +25,11 @@ module.exports = function (sequelize) {
         return res.status(400).send('Record already exists');
       }
 
+      const managerRoleIndex = memberRoles.findIndex((entry) => entry.uid === 'reporter');
       const newMember = await Member.create({
         userId: userId,
         projectId: projectId,
+        role: managerRoleIndex,
       });
 
       res.json(newMember);
diff --git a/backend/routes/users/find.js b/backend/routes/users/find.js
new file mode 100644
index 0000000..92ea8b3
--- /dev/null
+++ b/backend/routes/users/find.js
@@ -0,0 +1,41 @@
+const express = require('express');
+const router = express.Router();
+const defineUser = require('../../models/users');
+const { DataTypes, Op } = require('sequelize');
+
+module.exports = function (sequelize) {
+  const { verifySignedIn } = require('../../middleware/auth')(sequelize);
+  const User = defineUser(sequelize, DataTypes);
+
+  router.get('/find', verifySignedIn, async (req, res) => {
+    try {
+      const { search, excludeIds } = req.query;
+      if (!search) {
+        return res.status(400).json({ error: 'search text is required' });
+      }
+
+      let where = {};
+      if (search) {
+        where = {
+          [Op.or]: [{ email: { [Op.like]: `%${search}%` } }, { username: { [Op.like]: `%${search}%` } }],
+        };
+      }
+
+      if (excludeIds) {
+        const excludeIdArray = excludeIds.split(',').map((id) => parseInt(id, 10));
+        where.id = { [Op.notIn]: excludeIdArray };
+      }
+
+      const users = await User.findAll({
+        where,
+        limit: 7,
+      });
+      res.json(users);
+    } catch (error) {
+      console.error(error);
+      res.status(500).send('Internal Server Error');
+    }
+  });
+
+  return router;
+};
diff --git a/backend/seeders/seed.js b/backend/seeders/seed.js
index 71d6984..62af43e 100644
--- a/backend/seeders/seed.js
+++ b/backend/seeders/seed.js
@@ -17,6 +17,69 @@ module.exports = {
         createdAt: new Date(),
         updatedAt: new Date(),
       },
+      {
+        email: 'samuel@testplat.com',
+        password: hashedPassword,
+        username: 'Samuel Golden',
+        role: 1,
+        avatarPath: null,
+        createdAt: new Date(),
+        updatedAt: new Date(),
+      },
+      {
+        email: 'trey@testplat.com',
+        password: hashedPassword,
+        username: 'Trey Fisher',
+        role: 1,
+        avatarPath: null,
+        createdAt: new Date(),
+        updatedAt: new Date(),
+      },
+      {
+        email: 'zoe@testplat.com',
+        password: hashedPassword,
+        username: 'Zoe Woodward',
+        role: 1,
+        avatarPath: null,
+        createdAt: new Date(),
+        updatedAt: new Date(),
+      },
+      {
+        email: 'roger@testplat.com',
+        password: hashedPassword,
+        username: 'Roger Hess',
+        role: 1,
+        avatarPath: null,
+        createdAt: new Date(),
+        updatedAt: new Date(),
+      },
+      {
+        email: 'jasmine@testplat.com',
+        password: hashedPassword,
+        username: 'Jasmine Moody',
+        role: 1,
+        avatarPath: null,
+        createdAt: new Date(),
+        updatedAt: new Date(),
+      },
+      {
+        email: 'tatsuya@testplat.com',
+        password: hashedPassword,
+        username: 'Suzuki Tatsuya',
+        role: 1,
+        avatarPath: null,
+        createdAt: new Date(),
+        updatedAt: new Date(),
+      },
+      {
+        email: 'eri@testplat.com',
+        password: hashedPassword,
+        username: 'Sato Eri',
+        role: 1,
+        avatarPath: null,
+        createdAt: new Date(),
+        updatedAt: new Date(),
+      },
     ]);
 
     // Add projects table records
diff --git a/frontend/messages/en.json b/frontend/messages/en.json
index 0f7c569..baf6780 100644
--- a/frontend/messages/en.json
+++ b/frontend/messages/en.json
@@ -267,6 +267,10 @@
     "manager": "Manager",
     "developer": "Developer",
     "reporter": "Reporter",
-    "no_members_found": "No members found"
+    "no_members_found": "No members found",
+    "add_member": "Add member",
+    "user_name_or_email": "User name or email",
+    "close": "Close",
+    "add": "Add"
   }
 }
diff --git a/frontend/messages/ja.json b/frontend/messages/ja.json
index 7109a8a..6dfef32 100644
--- a/frontend/messages/ja.json
+++ b/frontend/messages/ja.json
@@ -266,6 +266,10 @@
     "manager": "管理者",
     "developer": "開発者",
     "reporter": "報告者",
-    "no_members_found": "メンバーがいません"
+    "no_members_found": "メンバーがいません",
+    "add_member": "メンバーの追加",
+    "user_name_or_email": "ユーザー名またはメールアドレス",
+    "close": "閉じる",
+    "add": "追加"
   }
 }
diff --git a/frontend/src/app/[locale]/projects/[projectId]/settings/AddMemberDialog.tsx b/frontend/src/app/[locale]/projects/[projectId]/settings/AddMemberDialog.tsx
new file mode 100644
index 0000000..569f8c9
--- /dev/null
+++ b/frontend/src/app/[locale]/projects/[projectId]/settings/AddMemberDialog.tsx
@@ -0,0 +1,103 @@
+'use client';
+import React from 'react';
+import { useState, useEffect, useContext } from 'react';
+import { Button, Input, Modal, ModalContent, ModalHeader, ModalBody, ModalFooter } from '@nextui-org/react';
+import { SettingsMessages } from '@/types/settings';
+import { TokenContext } from '@/utils/TokenProvider';
+import Config from '@/config/config';
+import { MemberType, UserType } from '@/types/user';
+import CandidatesTable from './CandidatesTable';
+const apiServer = Config.apiServer;
+
+type Props = {
+  isOpen: boolean;
+  members: MemberType[];
+  onCancel: () => void;
+  onAddMember: (memberAdded: UserType) => void;
+  messages: SettingsMessages;
+};
+
+// User Search by username
+async function searchUsers(jwt: string, text: string, excludeIdsParam: string) {
+  const fetchOptions = {
+    method: 'GET',
+    headers: {
+      'Content-Type': 'application/json',
+      Authorization: `Bearer ${jwt}`,
+    },
+  };
+
+  const url = `${apiServer}/users/find?search=${text}&excludeIds=${excludeIdsParam}`;
+
+  try {
+    const response = await fetch(url, fetchOptions);
+    if (!response.ok) {
+      throw new Error(`HTTP error! Status: ${response.status}`);
+    }
+    const data = await response.json();
+    return data;
+  } catch (error: any) {
+    console.error('Error fetching data:', error.message);
+  }
+}
+
+export default function AddMemberDialog({ isOpen, members, onCancel, onAddMember, messages }: Props) {
+  const context = useContext(TokenContext);
+  const [searchText, setSearchText] = useState('');
+  const [candidates, setCandidates] = useState<UserType[]>([]);
+
+  useEffect(() => {
+    async function fetchDataEffect() {
+      if (!searchText) {
+        return;
+      }
+
+      if (!context.isSignedIn()) {
+        return;
+      }
+
+      try {
+        const excludeIds = members.map((member) => {
+          return member.id;
+        });
+        const excludeIdsParam = excludeIds.join(',');
+        const data = await searchUsers(context.token.access_token, searchText, excludeIdsParam);
+        setCandidates(data);
+      } catch (error: any) {
+        console.error('Error in effect:', error.message);
+      }
+    }
+
+    fetchDataEffect();
+  }, [searchText]);
+
+  return (
+    <Modal
+      isOpen={isOpen}
+      onOpenChange={() => {
+        onCancel();
+      }}
+      size="2xl"
+    >
+      <ModalContent>
+        <ModalHeader className="flex flex-col gap-1">{messages.addMember}</ModalHeader>
+        <ModalBody>
+          <Input
+            type="text"
+            label={messages.userNameOrEmail}
+            value={searchText}
+            onChange={(e) => {
+              setSearchText(e.target.value);
+            }}
+          />
+          <CandidatesTable candidates={candidates} onAddPress={onAddMember} messages={messages} />
+        </ModalBody>
+        <ModalFooter>
+          <Button variant="light" onPress={onCancel}>
+            {messages.close}
+          </Button>
+        </ModalFooter>
+      </ModalContent>
+    </Modal>
+  );
+}
diff --git a/frontend/src/app/[locale]/projects/[projectId]/settings/CandidatesTable.tsx b/frontend/src/app/[locale]/projects/[projectId]/settings/CandidatesTable.tsx
new file mode 100644
index 0000000..0be9dc8
--- /dev/null
+++ b/frontend/src/app/[locale]/projects/[projectId]/settings/CandidatesTable.tsx
@@ -0,0 +1,90 @@
+import { useMemo, useCallback } from 'react';
+import { Button, Table, TableHeader, TableColumn, TableBody, TableRow, TableCell } from '@nextui-org/react';
+import { UserType } from '@/types/user';
+import { SettingsMessages } from '@/types/settings';
+import Avatar from 'boring-avatars';
+
+type Props = {
+  candidates: UserType[];
+  onAddPress: (memberAdded: UserType) => void;
+  messages: SettingsMessages;
+};
+
+export default function MembersTable({ candidates, onAddPress, messages }: Props) {
+  const headerColumns = [
+    { name: messages.avatar, uid: 'avatar' },
+    { name: messages.email, uid: 'email' },
+    { name: messages.username, uid: 'username' },
+    { name: messages.add, uid: 'add' },
+  ];
+
+  const renderCell = useCallback((candidate: UserType, columnKey: Key) => {
+    const cellValue = candidate[columnKey as keyof UserType];
+
+    switch (columnKey) {
+      case 'avatar':
+        return (
+          <Avatar
+            size={16}
+            name={candidate.username}
+            variant="beam"
+            colors={['#0A0310', '#49007E', '#FF005B', '#FF7D10', '#FFB238']}
+          />
+        );
+      case 'email':
+        return cellValue;
+      case 'username':
+        return cellValue;
+      case 'add':
+        return (
+          <Button color="primary" variant="faded" size="sm" onPress={() => onAddPress(candidate)}>
+            {messages.add}
+          </Button>
+        );
+      default:
+        return cellValue;
+    }
+  }, []);
+
+  const classNames = useMemo(
+    () => ({
+      wrapper: ['max-w-3xl'],
+      th: ['bg-transparent', 'text-default-500', 'border-b', 'border-divider'],
+      td: [
+        // changing the rows border radius
+        // first
+        'group-data-[first=true]:first:before:rounded-none',
+        'group-data-[first=true]:last:before:rounded-none',
+        // middle
+        'group-data-[middle=true]:before:rounded-none',
+        // last
+        'group-data-[last=true]:first:before:rounded-none',
+        'group-data-[last=true]:last:before:rounded-none',
+      ],
+    }),
+    []
+  );
+
+  return (
+    <>
+      <Table isCompact aria-label="Users table" classNames={classNames}>
+        <TableHeader columns={headerColumns}>
+          {(column) => (
+            <TableColumn
+              key={column.uid}
+              align={column.uid === 'actions' ? 'center' : 'start'}
+              allowsSorting={column.sortable}
+            >
+              {column.name}
+            </TableColumn>
+          )}
+        </TableHeader>
+        <TableBody emptyContent={messages.noMembersFound} items={candidates}>
+          {(item) => (
+            <TableRow key={item.id}>{(columnKey) => <TableCell>{renderCell(item, columnKey)}</TableCell>}</TableRow>
+          )}
+        </TableBody>
+      </Table>
+    </>
+  );
+}
diff --git a/frontend/src/app/[locale]/projects/[projectId]/settings/MembersTable.tsx b/frontend/src/app/[locale]/projects/[projectId]/settings/MembersTable.tsx
index 7a5b31a..8f82f4b 100644
--- a/frontend/src/app/[locale]/projects/[projectId]/settings/MembersTable.tsx
+++ b/frontend/src/app/[locale]/projects/[projectId]/settings/MembersTable.tsx
@@ -1,17 +1,16 @@
 import { useState, useMemo, useCallback } from 'react';
 import { Table, TableHeader, TableColumn, TableBody, TableRow, TableCell, SortDescriptor } from '@nextui-org/react';
-import { UserType } from '@/types/user';
+import { MemberType, UserType } from '@/types/user';
 import { SettingsMessages } from '@/types/settings';
 import { memberRoles } from '@/config/selection';
 import Avatar from 'boring-avatars';
 
 type Props = {
-  members: UserType[];
+  members: MemberType[];
   messages: SettingsMessages;
-  locale: string;
 };
 
-export default function MembersTable({ members, messages, locale }: Props) {
+export default function MembersTable({ members, messages }: Props) {
   const headerColumns = [
     { name: messages.avatar, uid: 'avatar', sortable: false },
     { name: messages.email, uid: 'email', sortable: true },
diff --git a/frontend/src/app/[locale]/projects/[projectId]/settings/SettingsPage.tsx b/frontend/src/app/[locale]/projects/[projectId]/settings/SettingsPage.tsx
index e78a390..c1a64db 100644
--- a/frontend/src/app/[locale]/projects/[projectId]/settings/SettingsPage.tsx
+++ b/frontend/src/app/[locale]/projects/[projectId]/settings/SettingsPage.tsx
@@ -1,11 +1,14 @@
 'use client';
 import React from 'react';
 import { useState, useEffect, useContext } from 'react';
-import { UserType } from '@/types/user';
+import { Button } from '@nextui-org/react';
+import { Plus } from 'lucide-react';
+import { MemberType, UserType } from '@/types/user';
 import { SettingsMessages } from '@/types/settings';
 import { TokenContext } from '@/utils/TokenProvider';
 import MembersTable from './MembersTable';
 import Config from '@/config/config';
+import AddMemberDialog from './AddMemberDialog';
 const apiServer = Config.apiServer;
 
 type Props = {
@@ -32,24 +35,22 @@ async function fetchProjectMembers(jwt: string, projectId: string) {
       throw new Error(`HTTP error! Status: ${response.status}`);
     }
     const data = await response.json();
-    console.log(data);
     return data;
   } catch (error: any) {
     console.error('Error fetching data:', error.message);
   }
 }
 
-// User Search by username
-async function fetchUsers(jwt: string, text: string) {
+async function addMember(jwt: string, userId: string, projectId: string) {
   const fetchOptions = {
-    method: 'GET',
+    method: 'POST',
     headers: {
       'Content-Type': 'application/json',
       Authorization: `Bearer ${jwt}`,
     },
   };
 
-  const url = `${apiServer}/users?text=${text}`;
+  const url = `${apiServer}/members?userId=${userId}&projectId=${projectId}`;
 
   try {
     const response = await fetch(url, fetchOptions);
@@ -65,7 +66,8 @@ async function fetchUsers(jwt: string, text: string) {
 
 export default function SettingsPage({ projectId, messages, locale }: Props) {
   const context = useContext(TokenContext);
-  const [members, setMembers] = useState<UserType[]>([]);
+  const [members, setMembers] = useState<MemberType[]>([]);
+  const [isDialogOpen, setIsDialogOpen] = useState(false);
 
   useEffect(() => {
     async function fetchDataEffect() {
@@ -84,13 +86,34 @@ export default function SettingsPage({ projectId, messages, locale }: Props) {
     fetchDataEffect();
   }, [context]);
 
+  const handleAddMember = async (memberAdded: UserType) => {
+    const newMember = await addMember(context.token.access_token, memberAdded.id, projectId);
+    newMember.User = memberAdded;
+    const updateMembers = [...members];
+    updateMembers.push(newMember);
+    setMembers(updateMembers);
+
+    setIsDialogOpen(false);
+  };
+
   return (
     <div className="container mx-auto max-w-3xl pt-16 px-6 flex-grow">
       <div className="w-full p-3 flex items-center justify-between">
         <h3 className="font-bold">{messages.memberManagement}</h3>
+        <Button startContent={<Plus size={16} />} size="sm" color="primary" onClick={() => setIsDialogOpen(true)}>
+          {messages.addMember}
+        </Button>
       </div>
 
-      <MembersTable members={members} messages={messages} locale={locale} />
+      <MembersTable members={members} messages={messages} />
+
+      <AddMemberDialog
+        isOpen={isDialogOpen}
+        members={members}
+        onCancel={() => setIsDialogOpen(false)}
+        onAddMember={handleAddMember}
+        messages={messages}
+      />
     </div>
   );
 }
diff --git a/frontend/src/app/[locale]/projects/[projectId]/settings/page.tsx b/frontend/src/app/[locale]/projects/[projectId]/settings/page.tsx
index f1b5c89..d257a53 100644
--- a/frontend/src/app/[locale]/projects/[projectId]/settings/page.tsx
+++ b/frontend/src/app/[locale]/projects/[projectId]/settings/page.tsx
@@ -13,6 +13,10 @@ export default function Page({ params }: { params: { projectId: string; locale:
     developer: t('developer'),
     reporter: t('reporter'),
     noMembersFound: t('no_members_found'),
+    addMember: t('add_member'),
+    userNameOrEmail: t('user_name_or_email'),
+    close: t('close'),
+    add: t('add'),
   };
 
   return (
diff --git a/frontend/types/settings.ts b/frontend/types/settings.ts
index a79f38e..712ff67 100644
--- a/frontend/types/settings.ts
+++ b/frontend/types/settings.ts
@@ -5,4 +5,8 @@ export type SettingsMessages = {
   username: string;
   role: string;
   noMembersFound: string;
+  addMember: string;
+  userNameOrEmail: string;
+  close: string;
+  add: string;
 };
diff --git a/frontend/types/user.ts b/frontend/types/user.ts
index ec4cb9b..2ca3727 100644
--- a/frontend/types/user.ts
+++ b/frontend/types/user.ts
@@ -68,3 +68,11 @@ export type AccountDropDownMessages = {
   signIn: string;
   signOut: string;
 };
+
+export type MemberType = {
+  id: number | null;
+  userId: number;
+  projectId: number;
+  role: number;
+  User: UserType;
+};