diff --git a/src/authz-module/data/api.ts b/src/authz-module/data/api.ts
index 86f5fb04..d22b2140 100644
--- a/src/authz-module/data/api.ts
+++ b/src/authz-module/data/api.ts
@@ -24,7 +24,6 @@ export interface AssignTeamMembersRoleRequest {
   scope: string;
 }
 
-// TODO: replece api path once is created
 export const getTeamMembers = async (object: string): Promise<TeamMember[]> => {
   const { data } = await getAuthenticatedHttpClient().get(getApiUrl(`/api/authz/v1/roles/users/?scope=${object}`));
   return camelCaseObject(data.results);
diff --git a/src/authz-module/libraries-manager/LibrariesUserManager.tsx b/src/authz-module/libraries-manager/LibrariesUserManager.tsx
index 9952ae1c..6883e818 100644
--- a/src/authz-module/libraries-manager/LibrariesUserManager.tsx
+++ b/src/authz-module/libraries-manager/LibrariesUserManager.tsx
@@ -6,6 +6,7 @@ import { ROUTES } from '@src/authz-module/constants';
 import AuthZLayout from '../components/AuthZLayout';
 import { useLibraryAuthZ } from './context';
 import RoleCard from '../components/RoleCard';
+import { AssignNewRoleTrigger } from './components/AssignNewRoleModal';
 import { useLibrary, useTeamMembers } from '../data/hooks';
 import { buildPermissionsByRoleMatrix } from './utils';
 
@@ -15,7 +16,7 @@ const LibrariesUserManager = () => {
   const intl = useIntl();
   const { username } = useParams();
   const {
-    libraryId, permissions, roles, resources,
+    libraryId, permissions, roles, resources, canManageTeam,
   } = useLibraryAuthZ();
   const { data: library } = useLibrary(libraryId);
   const rootBreadcrumb = intl.formatMessage(messages['library.authz.breadcrumb.root']) || '';
@@ -42,7 +43,13 @@ const LibrariesUserManager = () => {
         activeLabel={user?.username || ''}
         pageTitle={user?.username || ''}
         pageSubtitle={<p>{user?.email}</p>}
-        actions={[]}
+        actions={user && canManageTeam
+          ? [<AssignNewRoleTrigger
+              username={user.username}
+              libraryId={libraryId}
+              currentUserRoles={userRoles.map(role => role.role)}
+          />]
+          : []}
       >
         <Container className="bg-light-200 p-5">
           {isLoading ? <Skeleton count={2} height={200} /> : null}
diff --git a/src/authz-module/libraries-manager/components/AssignNewRoleModal/AssignNewRoleModal.test.tsx b/src/authz-module/libraries-manager/components/AssignNewRoleModal/AssignNewRoleModal.test.tsx
new file mode 100644
index 00000000..e8780570
--- /dev/null
+++ b/src/authz-module/libraries-manager/components/AssignNewRoleModal/AssignNewRoleModal.test.tsx
@@ -0,0 +1,219 @@
+import { screen } from '@testing-library/react';
+import userEvent from '@testing-library/user-event';
+import { renderWrapper } from '@src/setupTest';
+import { Role } from 'types';
+import AssignNewRoleModal from './AssignNewRoleModal';
+
+describe('AssignNewRoleModal', () => {
+  const defaultProps = {
+    isOpen: true,
+    isLoading: false,
+    roleOptions: [
+      {
+        role: 'instructor',
+        name: 'Instructor',
+        description: 'Can create and edit content',
+        userCount: 5,
+        permissions: ['view', 'edit'],
+      },
+      {
+        role: 'admin',
+        name: 'Administrator',
+        description: 'Full access to the library',
+        userCount: 2,
+        permissions: ['view', 'edit', 'delete', 'manage'],
+      },
+      {
+        role: 'viewer',
+        name: 'Viewer',
+        description: 'Can only view content',
+        userCount: 10,
+        permissions: ['view'],
+      },
+    ] as Role[],
+    selectedRole: '',
+    close: jest.fn(),
+    onSave: jest.fn(),
+    handleChangeSelectedRole: jest.fn(),
+  };
+
+  beforeEach(() => {
+    jest.clearAllMocks();
+  });
+
+  const renderComponent = (props = {}) => {
+    const finalProps = { ...defaultProps, ...props };
+    return renderWrapper(<AssignNewRoleModal {...finalProps} />);
+  };
+
+  describe('Modal Visibility', () => {
+    it('renders modal when isOpen is true', () => {
+      renderComponent({ isOpen: true });
+
+      expect(screen.getByRole('dialog')).toBeInTheDocument();
+      expect(screen.getByText('Add New Role')).toBeInTheDocument();
+    });
+
+    it('does not render modal when isOpen is false', () => {
+      renderComponent({ isOpen: false });
+
+      expect(screen.queryByRole('dialog')).not.toBeInTheDocument();
+      expect(screen.queryByText('Add New Role')).not.toBeInTheDocument();
+    });
+  });
+
+  describe('Modal Structure', () => {
+    it('renders modal header with correct title', () => {
+      renderComponent({ isOpen: true });
+
+      expect(screen.getByText('Add New Role')).toBeInTheDocument();
+      expect(screen.getByRole('dialog')).toBeInTheDocument();
+    });
+
+    it('renders close button in header', () => {
+      renderComponent();
+
+      expect(screen.getByRole('button', { name: /close/i })).toBeInTheDocument();
+    });
+  });
+
+  describe('Role Selection Form', () => {
+    it('renders role selection form with correct label', () => {
+      renderComponent();
+
+      expect(screen.getByText('Roles')).toBeInTheDocument();
+      expect(screen.getByRole('combobox')).toBeInTheDocument();
+    });
+
+    it('renders default option', () => {
+      renderComponent();
+
+      expect(screen.getByText('Select a role')).toBeInTheDocument();
+      expect(screen.getByRole('option', { name: 'Select a role' })).toBeDisabled();
+    });
+
+    it('renders all role options', () => {
+      renderComponent();
+
+      defaultProps.roleOptions.forEach((role) => {
+        expect(screen.getByRole('option', { name: role.name })).toBeInTheDocument();
+      });
+    });
+
+    it('displays selected role correctly', () => {
+      renderComponent({ selectedRole: 'instructor' });
+
+      const selectElement = screen.getByRole('combobox');
+      expect(selectElement).toHaveValue('instructor');
+    });
+
+    it('calls handleChangeSelectedRole when role selection changes', async () => {
+      const user = userEvent.setup();
+      renderComponent();
+
+      const selectElement = screen.getByRole('combobox');
+      await user.selectOptions(selectElement, 'admin');
+
+      expect(defaultProps.handleChangeSelectedRole).toHaveBeenCalled();
+    });
+  });
+
+  describe('Action Buttons', () => {
+    it('renders Cancel button with correct text', () => {
+      renderComponent();
+
+      expect(screen.getByRole('button', { name: /cancel/i })).toBeInTheDocument();
+    });
+
+    it('renders Save button with correct text when not loading', () => {
+      renderComponent({ isLoading: false });
+
+      expect(screen.getByRole('button', { name: /save/i })).toBeInTheDocument();
+    });
+
+    it('renders Save button with loading text when loading', () => {
+      renderComponent({ isLoading: true });
+
+      expect(screen.getByRole('button', { name: /saving/i })).toBeInTheDocument();
+    });
+
+    it('calls close when Cancel button is clicked', async () => {
+      const user = userEvent.setup();
+      renderComponent();
+
+      const cancelButton = screen.getByRole('button', { name: /cancel/i });
+      await user.click(cancelButton);
+
+      expect(defaultProps.close).toHaveBeenCalledTimes(1);
+    });
+
+    it('calls onSave when Save button is clicked', async () => {
+      const user = userEvent.setup();
+      renderComponent({ selectedRole: 'instructor' });
+
+      const saveButton = screen.getByRole('button', { name: /save/i });
+      await user.click(saveButton);
+
+      expect(defaultProps.onSave).toHaveBeenCalledTimes(1);
+    });
+  });
+
+  describe('Button States', () => {
+    it('disables Save button when no role is selected', () => {
+      renderComponent({ selectedRole: '' });
+
+      const saveButton = screen.getByRole('button', { name: /save/i });
+      expect(saveButton).toBeDisabled();
+    });
+
+    it('enables Save button when role is selected and not loading', () => {
+      renderComponent({ selectedRole: 'instructor', isLoading: false });
+
+      const saveButton = screen.getByRole('button', { name: /save/i });
+      expect(saveButton).not.toBeDisabled();
+    });
+
+    it('disables Save button when loading', () => {
+      renderComponent({ selectedRole: 'instructor', isLoading: true });
+
+      const saveButton = screen.getByRole('button', { name: /saving/i });
+      expect(saveButton).toBeDisabled();
+    });
+
+    it('disables Cancel button when loading', () => {
+      renderComponent({ isLoading: true });
+
+      const cancelButton = screen.getByRole('button', { name: /cancel/i });
+      expect(cancelButton).toBeDisabled();
+    });
+
+    it('enables Cancel button when not loading', () => {
+      renderComponent({ isLoading: false });
+
+      const cancelButton = screen.getByRole('button', { name: /cancel/i });
+      expect(cancelButton).not.toBeDisabled();
+    });
+  });
+
+  describe('Modal Close Behavior', () => {
+    it('does not call close when modal header close is clicked during loading', async () => {
+      const user = userEvent.setup();
+      renderComponent({ isLoading: true });
+
+      const headerCloseButton = screen.getByRole('button', { name: /close/i });
+      await user.click(headerCloseButton);
+
+      expect(defaultProps.close).not.toHaveBeenCalled();
+    });
+
+    it('calls close when modal header close is clicked and not loading', async () => {
+      const user = userEvent.setup();
+      renderComponent({ isLoading: false });
+
+      const headerCloseButton = screen.getByRole('button', { name: /close/i });
+      await user.click(headerCloseButton);
+
+      expect(defaultProps.close).toHaveBeenCalledTimes(1);
+    });
+  });
+});
diff --git a/src/authz-module/libraries-manager/components/AssignNewRoleModal/AssignNewRoleModal.tsx b/src/authz-module/libraries-manager/components/AssignNewRoleModal/AssignNewRoleModal.tsx
new file mode 100644
index 00000000..0fca938f
--- /dev/null
+++ b/src/authz-module/libraries-manager/components/AssignNewRoleModal/AssignNewRoleModal.tsx
@@ -0,0 +1,70 @@
+import { FC } from 'react';
+import { useIntl } from '@edx/frontend-platform/i18n';
+import {
+  ActionRow, Button, Form, ModalDialog,
+} from '@openedx/paragon';
+import { Role } from 'types';
+import messages from '../messages';
+
+interface AssignNewRoleModalProps {
+  isOpen: boolean;
+  isLoading: boolean;
+  roleOptions: Role[];
+  selectedRole: string;
+  close: () => void;
+  onSave: () => void;
+  handleChangeSelectedRole: (e: React.ChangeEvent<HTMLTextAreaElement | HTMLSelectElement>) => void;
+}
+
+const AssignNewRoleModal: FC<AssignNewRoleModalProps> = ({
+  isOpen, isLoading, selectedRole, roleOptions, close, onSave, handleChangeSelectedRole,
+}) => {
+  const intl = useIntl();
+  return (
+    <ModalDialog
+      title={intl.formatMessage(messages['libraries.authz.manage.assign.new.role.title'])}
+      isOpen={isOpen}
+      onClose={isLoading ? () => {} : close}
+      size="lg"
+      variant="dark"
+      hasCloseButton
+      isOverflowVisible={false}
+      zIndex={5}
+    >
+      <ModalDialog.Header className="bg-primary-500 text-light-100">
+        <ModalDialog.Title>
+          {intl.formatMessage(messages['libraries.authz.manage.assign.new.role.title'])}
+        </ModalDialog.Title>
+      </ModalDialog.Header>
+
+      <ModalDialog.Body className="my-4">
+        <Form.Group controlId="role_options">
+          <Form.Label>{intl.formatMessage(messages['library.authz.team.table.roles'])}</Form.Label>
+          <Form.Control as="select" name="role" value={selectedRole} onChange={handleChangeSelectedRole}>
+            <option value="" disabled>Select a role</option>
+            {roleOptions.map((role) => <option key={role.role} value={role.role}>{role.name}</option>)}
+          </Form.Control>
+        </Form.Group>
+      </ModalDialog.Body>
+
+      <ModalDialog.Footer>
+        <ActionRow>
+          <ModalDialog.CloseButton variant="tertiary" disabled={isLoading}>
+            {intl.formatMessage(messages['libraries.authz.manage.cancel.button'])}
+          </ModalDialog.CloseButton>
+          <Button
+            className="px-4"
+            onClick={() => onSave()}
+            disabled={!selectedRole || isLoading}
+          >
+            {isLoading
+              ? intl.formatMessage(messages['libraries.authz.manage.saving.button'])
+              : intl.formatMessage(messages['libraries.authz.manage.save.button'])}
+          </Button>
+        </ActionRow>
+      </ModalDialog.Footer>
+    </ModalDialog>
+  );
+};
+
+export default AssignNewRoleModal;
diff --git a/src/authz-module/libraries-manager/components/AssignNewRoleModal/AssignNewRoleTrigger.test.tsx b/src/authz-module/libraries-manager/components/AssignNewRoleModal/AssignNewRoleTrigger.test.tsx
new file mode 100644
index 00000000..f39ee35d
--- /dev/null
+++ b/src/authz-module/libraries-manager/components/AssignNewRoleModal/AssignNewRoleTrigger.test.tsx
@@ -0,0 +1,265 @@
+import { screen, waitFor } from '@testing-library/react';
+import userEvent from '@testing-library/user-event';
+import { renderWrapper } from '@src/setupTest';
+import { useLibraryAuthZ } from '@src/authz-module/libraries-manager/context';
+import { useAssignTeamMembersRole } from '@src/authz-module/data/hooks';
+import AssignNewRoleTrigger from './AssignNewRoleTrigger';
+
+jest.mock('@src/authz-module/libraries-manager/context', () => ({
+  useLibraryAuthZ: jest.fn(),
+}));
+
+jest.mock('@src/authz-module/data/hooks', () => ({
+  useAssignTeamMembersRole: jest.fn(),
+}));
+
+jest.mock('./AssignNewRoleModal', () => {
+  const MockAssignNewRoleModal = ({
+    isOpen,
+    close,
+    onSave,
+    isLoading,
+    roleOptions,
+    selectedRole,
+    handleChangeSelectedRole,
+  }: any) => (isOpen ? (
+    <div data-testid="assign-new-role-modal">
+      <h2>Add New Role</h2>
+      <select data-testid="role-select" value={selectedRole} onChange={handleChangeSelectedRole}>
+        <option value="">Select a role</option>
+        {roleOptions.map((role: any) => (
+          <option key={role.role} value={role.role}>
+            {role.name}
+          </option>
+        ))}
+      </select>
+      <button type="button" onClick={onSave} disabled={isLoading} data-testid="save-button">
+        {isLoading ? 'Saving...' : 'Save'}
+      </button>
+      <button type="button" onClick={close} data-testid="cancel-button">
+        Cancel
+      </button>
+    </div>
+  ) : null);
+  MockAssignNewRoleModal.displayName = 'AssignNewRoleModal';
+  return MockAssignNewRoleModal;
+});
+
+const mockUseLibraryAuthZ = useLibraryAuthZ as jest.Mock;
+const mockUseAssignTeamMembersRole = useAssignTeamMembersRole as jest.Mock;
+
+describe('AssignNewRoleTrigger', () => {
+  const defaultProps = {
+    username: 'testuser',
+    libraryId: 'lib:test-library',
+    currentUserRoles: ['instructor'],
+  };
+
+  const mockRoles = [
+    {
+      role: 'instructor',
+      name: 'Instructor',
+      description: 'Can create and edit content',
+    },
+    {
+      role: 'admin',
+      name: 'Administrator',
+      description: 'Full access to the library',
+    },
+    {
+      role: 'viewer',
+      name: 'Viewer',
+      description: 'Can only view content',
+    },
+  ];
+
+  const mockMutate = jest.fn();
+
+  beforeEach(() => {
+    jest.clearAllMocks();
+
+    mockUseLibraryAuthZ.mockReturnValue({
+      roles: mockRoles,
+    });
+
+    mockUseAssignTeamMembersRole.mockReturnValue({
+      mutate: mockMutate,
+      isPending: false,
+    });
+  });
+
+  const renderComponent = (props = {}) => {
+    const finalProps = { ...defaultProps, ...props };
+    return renderWrapper(<AssignNewRoleTrigger {...finalProps} />);
+  };
+
+  describe('Initial Render', () => {
+    it('renders the trigger button with correct text', () => {
+      renderComponent();
+
+      expect(screen.getByRole('button', { name: /add new role/i })).toBeInTheDocument();
+    });
+
+    it('does not show modal initially', () => {
+      renderComponent();
+
+      expect(screen.queryByTestId('assign-new-role-modal')).not.toBeInTheDocument();
+    });
+
+    it('does not show toast initially', () => {
+      renderComponent();
+
+      expect(screen.queryByText(/role added successfully/i)).not.toBeInTheDocument();
+    });
+  });
+
+  describe('Modal Interaction', () => {
+    it('opens modal when trigger button is clicked', async () => {
+      const user = userEvent.setup();
+      renderComponent();
+
+      const triggerButton = screen.getByRole('button', { name: /add new role/i });
+      await user.click(triggerButton);
+
+      expect(screen.getByTestId('assign-new-role-modal')).toBeInTheDocument();
+      expect(screen.getByRole('heading', { name: /add new role/i })).toBeInTheDocument();
+    });
+
+    it('closes modal when cancel button is clicked', async () => {
+      const user = userEvent.setup();
+      renderComponent();
+
+      // Open modal
+      await user.click(screen.getByRole('button', { name: /add new role/i }));
+      expect(screen.getByTestId('assign-new-role-modal')).toBeInTheDocument();
+
+      // Close modal
+      await user.click(screen.getByTestId('cancel-button'));
+      expect(screen.queryByTestId('assign-new-role-modal')).not.toBeInTheDocument();
+    });
+  });
+
+  describe('Role Selection and Assignment', () => {
+    it('updates selected role when role select changes', async () => {
+      const user = userEvent.setup();
+      renderComponent();
+
+      await user.click(screen.getByRole('button', { name: /add new role/i }));
+
+      const roleSelect = screen.getByTestId('role-select');
+      await user.selectOptions(roleSelect, 'admin');
+
+      expect(roleSelect).toHaveValue('admin');
+    });
+
+    it('calls assignTeamMembersRole with correct data when save is clicked', async () => {
+      const choosenRole = mockRoles[1].role; // 'admin'
+      const user = userEvent.setup();
+      renderComponent();
+
+      await user.click(screen.getByRole('button', { name: /add new role/i }));
+
+      // Select a role
+      const roleSelect = screen.getByTestId('role-select');
+      await user.selectOptions(roleSelect, choosenRole);
+
+      // Click save
+      await user.click(screen.getByTestId('save-button'));
+
+      expect(mockMutate).toHaveBeenCalledWith(
+        {
+          data: {
+            users: [defaultProps.username],
+            role: choosenRole,
+            scope: defaultProps.libraryId,
+          },
+        },
+        expect.objectContaining({
+          onSuccess: expect.any(Function),
+        }),
+      );
+    });
+
+    it('does not call assignTeamMembersRole if user already has the selected role', async () => {
+      const choosenRole = mockRoles[1].role; // 'admin'
+      const user = userEvent.setup();
+      renderComponent({ currentUserRoles: ['instructor', choosenRole] });
+
+      await user.click(screen.getByRole('button', { name: /add new role/i }));
+
+      // Select a role that user already has
+      const roleSelect = screen.getByTestId('role-select');
+      await user.selectOptions(roleSelect, choosenRole);
+
+      await user.click(screen.getByTestId('save-button'));
+
+      // Should not call assignTeamMembersRole
+      expect(mockMutate).not.toHaveBeenCalled();
+      // Modal should be closed
+      expect(screen.queryByTestId('assign-new-role-modal')).not.toBeInTheDocument();
+    });
+  });
+
+  describe('Loading State', () => {
+    it('shows loading state in modal when assignment is pending', async () => {
+      mockUseAssignTeamMembersRole.mockReturnValue({
+        mutate: mockMutate,
+        isPending: true,
+      });
+
+      const user = userEvent.setup();
+      renderComponent();
+
+      await user.click(screen.getByRole('button', { name: /add new role/i }));
+
+      expect(screen.getByTestId('save-button')).toBeDisabled();
+      expect(screen.getByText('Saving...')).toBeInTheDocument();
+    });
+  });
+
+  describe('Success Handling', () => {
+    it('shows success toast after successful role assignment', async () => {
+      const user = userEvent.setup();
+      renderComponent();
+
+      await user.click(screen.getByRole('button', { name: /add new role/i }));
+
+      const roleSelect = screen.getByTestId('role-select');
+      await user.selectOptions(roleSelect, 'admin');
+
+      await user.click(screen.getByTestId('save-button'));
+
+      // Simulate successful API call
+      const onSuccessCallback = mockMutate.mock.calls[0][1].onSuccess;
+      onSuccessCallback();
+
+      await waitFor(() => {
+        expect(screen.getByText(/role added successfully/i)).toBeInTheDocument();
+      });
+    });
+
+    it('closes modal and resets role after successful assignment', async () => {
+      const user = userEvent.setup();
+      renderComponent();
+
+      await user.click(screen.getByRole('button', { name: /add new role/i }));
+
+      const roleSelect = screen.getByTestId('role-select');
+      await user.selectOptions(roleSelect, 'admin');
+
+      await user.click(screen.getByTestId('save-button'));
+
+      // Simulate successful API call
+      const onSuccessCallback = mockMutate.mock.calls[0][1].onSuccess;
+      onSuccessCallback();
+
+      await waitFor(() => {
+        expect(screen.queryByTestId('assign-new-role-modal')).not.toBeInTheDocument();
+      });
+
+      // Open modal again to check if role is reset
+      await user.click(screen.getByRole('button', { name: /add new role/i }));
+      expect(screen.getByTestId('role-select')).toHaveValue('');
+    });
+  });
+});
diff --git a/src/authz-module/libraries-manager/components/AssignNewRoleModal/AssignNewRoleTrigger.tsx b/src/authz-module/libraries-manager/components/AssignNewRoleModal/AssignNewRoleTrigger.tsx
new file mode 100644
index 00000000..a0cc5085
--- /dev/null
+++ b/src/authz-module/libraries-manager/components/AssignNewRoleModal/AssignNewRoleTrigger.tsx
@@ -0,0 +1,92 @@
+import React, { FC, useState } from 'react';
+import { useIntl } from '@edx/frontend-platform/i18n';
+import { Button, Toast, useToggle } from '@openedx/paragon';
+import { Plus } from '@openedx/paragon/icons';
+
+import { useLibraryAuthZ } from '@src/authz-module/libraries-manager/context';
+import { useAssignTeamMembersRole } from '@src/authz-module/data/hooks';
+import messages from '../messages';
+import AssignNewRoleModal from './AssignNewRoleModal';
+
+interface AssignNewRoleTriggerProps {
+  username: string;
+  libraryId: string;
+  currentUserRoles: string[];
+}
+
+const AssignNewRoleTrigger: FC<AssignNewRoleTriggerProps> = ({
+  username,
+  libraryId,
+  currentUserRoles,
+}) => {
+  const intl = useIntl();
+  const [isOpen, open, close] = useToggle(false);
+  const [toastMessage, setToastMessage] = useState<string | null>(null);
+  const { roles } = useLibraryAuthZ();
+
+  const [newRole, setNewRole] = useState<string>('');
+
+  const { mutate: assignTeamMembersRole, isPending: isAssignTeamMembersRolePending } = useAssignTeamMembersRole();
+
+  const handleAddRole = () => {
+    const data = {
+      users: [username],
+      role: newRole,
+      scope: libraryId,
+    };
+
+    if (currentUserRoles.includes(newRole)) {
+      close();
+      setNewRole('');
+      return;
+    }
+
+    assignTeamMembersRole({ data }, {
+      onSuccess: () => {
+        setToastMessage(
+          intl.formatMessage(
+            messages['libraries.authz.manage.assign.role.success'],
+          ),
+        );
+        close();
+        setNewRole('');
+      },
+    });
+  };
+
+  return (
+    <>
+      <Button
+        key="authz-header-action-new-team-member"
+        iconBefore={Plus}
+        onClick={open}
+      >
+        {intl.formatMessage(messages['libraries.authz.manage.assign.new.role.title'])}
+      </Button>
+
+      {isOpen && (
+        <AssignNewRoleModal
+          isOpen={isOpen}
+          close={close}
+          onSave={handleAddRole}
+          isLoading={isAssignTeamMembersRolePending}
+          roleOptions={roles}
+          selectedRole={newRole}
+          handleChangeSelectedRole={(e) => setNewRole(e.target.value)}
+
+        />
+      )}
+
+      {toastMessage && (
+        <Toast
+          onClose={() => setToastMessage(null)}
+          show={!!toastMessage}
+        >
+          {toastMessage}
+        </Toast>
+      )}
+    </>
+  );
+};
+
+export default AssignNewRoleTrigger;
diff --git a/src/authz-module/libraries-manager/components/AssignNewRoleModal/index.ts b/src/authz-module/libraries-manager/components/AssignNewRoleModal/index.ts
new file mode 100644
index 00000000..2f8d6091
--- /dev/null
+++ b/src/authz-module/libraries-manager/components/AssignNewRoleModal/index.ts
@@ -0,0 +1,4 @@
+import AssignNewRoleModal from './AssignNewRoleModal';
+import AssignNewRoleTrigger from './AssignNewRoleTrigger';
+
+export { AssignNewRoleModal, AssignNewRoleTrigger };
diff --git a/src/authz-module/libraries-manager/components/messages.ts b/src/authz-module/libraries-manager/components/messages.ts
index 709ad1ef..d36537e7 100644
--- a/src/authz-module/libraries-manager/components/messages.ts
+++ b/src/authz-module/libraries-manager/components/messages.ts
@@ -31,6 +31,31 @@ const messages = defineMessages({
     defaultMessage: 'Edit',
     description: 'Edit action',
   },
+  'libraries.authz.manage.assign.new.role.title': {
+    id: 'libraries.authz.manage.assign.new.role.title',
+    defaultMessage: 'Add New Role',
+    description: 'Libraries AuthZ assign a new role to a user button title',
+  },
+  'libraries.authz.manage.cancel.button': {
+    id: 'libraries.authz.manage.cancel.button',
+    defaultMessage: 'Cancel',
+    description: 'Libraries AuthZ cancel button title',
+  },
+  'libraries.authz.manage.saving.button': {
+    id: 'libraries.authz.manage.saving.button',
+    defaultMessage: 'Saving...',
+    description: 'Libraries AuthZ saving button title',
+  },
+  'libraries.authz.manage.save.button': {
+    id: 'libraries.authz.manage.save.button',
+    defaultMessage: 'Save',
+    description: 'Libraries AuthZ save button title',
+  },
+  'libraries.authz.manage.assign.role.success': {
+    id: 'libraries.authz.manage.assign.role.success',
+    defaultMessage: 'Role added successfully.',
+    description: 'Libraries AuthZ assign role success message',
+  },
 });
 
 export default messages;