diff --git a/jsapp/js/account/organization/MemberRoleSelector.tsx b/jsapp/js/account/organization/MemberRoleSelector.tsx
index f4110f9c90..b82194be9a 100644
--- a/jsapp/js/account/organization/MemberRoleSelector.tsx
+++ b/jsapp/js/account/organization/MemberRoleSelector.tsx
@@ -1,7 +1,7 @@
-import KoboSelect from 'jsapp/js/components/common/koboSelect';
+import {Select} from 'jsapp/js/components/common/Select';
 import {usePatchOrganizationMember} from './membersQuery';
 import {OrganizationUserRole} from './organizationQuery';
-import {type KoboDropdownPlacement} from 'jsapp/js/components/common/koboDropdown';
+import {LoadingOverlay} from '@mantine/core';
 
 interface MemberRoleSelectorProps {
   username: string;
@@ -9,43 +9,38 @@ interface MemberRoleSelectorProps {
   role: OrganizationUserRole;
   /** The role of the currently logged in user. */
   currentUserRole: OrganizationUserRole;
-  placement: KoboDropdownPlacement;
 }
 
-export default function MemberRoleSelector(
-  {username, role, currentUserRole, placement}: MemberRoleSelectorProps
-) {
+export default function MemberRoleSelector({
+  username,
+  role,
+}: MemberRoleSelectorProps) {
   const patchMember = usePatchOrganizationMember(username);
 
-  const canModifyRole = (
-    currentUserRole === 'owner' ||
-    currentUserRole === 'admin'
-  );
+  const handleRoleChange = (newRole: string | null) => {
+    if (newRole) {
+      patchMember.mutateAsync({role: newRole as OrganizationUserRole});
+    }
+  };
 
   return (
-    <KoboSelect
-      name={`member-role-selector-${username}`}
-      type='outline'
-      size='m'
-      placement={placement}
-      options={[
-        {
-          value: OrganizationUserRole.admin,
-          label: t('Admin'),
-        },
-        {
-          value: OrganizationUserRole.member,
-          label: t('Member'),
-        },
-      ]}
-      selectedOption={role}
-      onChange={(newRole: string | null) => {
-        if (newRole) {
-          patchMember.mutateAsync({role: newRole as OrganizationUserRole});
-        }
-      }}
-      isPending={patchMember.isPending}
-      isDisabled={!canModifyRole}
-    />
+    <>
+      <LoadingOverlay visible={patchMember.isPending} />
+      <Select
+        size='sm'
+        data={[
+          {
+            value: OrganizationUserRole.admin,
+            label: t('Admin'),
+          },
+          {
+            value: OrganizationUserRole.member,
+            label: t('Member'),
+          },
+        ]}
+        value={role}
+        onChange={handleRoleChange}
+      />
+    </>
   );
 }
diff --git a/jsapp/js/account/organization/MembersRoute.tsx b/jsapp/js/account/organization/MembersRoute.tsx
index 5031c77118..71c0aaa7c9 100644
--- a/jsapp/js/account/organization/MembersRoute.tsx
+++ b/jsapp/js/account/organization/MembersRoute.tsx
@@ -68,22 +68,30 @@ export default function MembersRoute() {
     {
       key: 'role',
       label: t('Role'),
-      size: 120,
-      cellFormatter: (member: OrganizationMember, rowIndex: number) => {
-        if (member.role === OrganizationUserRole.owner) {
-          return t('Owner');
+      size: 140,
+      cellFormatter: (member: OrganizationMember) => {
+        if (
+          member.role === OrganizationUserRole.owner ||
+          !['owner', 'admin'].includes(orgQuery.data.request_user_role)
+        ) {
+          // If the member is the Owner or
+          // If the user is not an owner or admin, we don't show the selector
+          switch (member.role) {
+            case OrganizationUserRole.owner:
+              return t('Owner');
+            case OrganizationUserRole.admin:
+              return t('Admin');
+            case OrganizationUserRole.member:
+              return t('Member');
+            default:
+              return t('Unknown');
+          }
         }
         return (
           <MemberRoleSelector
             username={member.user__username}
             role={member.role}
             currentUserRole={orgQuery.data.request_user_role}
-            // To avoid opening selector outside the container (causing
-            // unnecessary scrollbar), we open first 2 rows down, and the other
-            // rows up.
-            // TODO: this should be fixed by using a component with Portal
-            // functionality (looking at Mantine or MUI).
-            placement={rowIndex <= 1 ? 'down-center' : 'up-center'}
           />
         );
       },
diff --git a/jsapp/js/components/common/Select.stories.tsx b/jsapp/js/components/common/Select.stories.tsx
new file mode 100644
index 0000000000..1b6b06f6e8
--- /dev/null
+++ b/jsapp/js/components/common/Select.stories.tsx
@@ -0,0 +1,141 @@
+import {Stack, type MantineSize} from '@mantine/core';
+import {Select} from './Select';
+import type {Meta, StoryObj} from '@storybook/react';
+
+const sizes: MantineSize[] = ['xs', 'sm', 'md', 'lg', 'xl'];
+
+const data = [
+  {label: 'Apple', value: '1'},
+  {label: 'Banana', value: '2'},
+  {label: 'Cherry', value: '3'},
+  {label: 'Grape', value: '7'},
+  {label: 'Lemon', value: '12'},
+];
+
+const largeData = [
+  {label: 'Apple', value: '1'},
+  {label: 'Banana', value: '2'},
+  {label: 'Cherry', value: '3'},
+  {label: 'Date', value: '4'},
+  {label: 'Elderberry', value: '5'},
+  {label: 'Fig', value: '6'},
+  {label: 'Grape', value: '7'},
+  {label: 'Honeydew', value: '8'},
+  {label: 'Indian Fig', value: '9'},
+  {label: 'Jackfruit', value: '10'},
+  {label: 'Kiwi', value: '11'},
+  {label: 'Lemon', value: '12'},
+  {label: 'Mango', value: '13'},
+  {label: 'Nectarine', value: '14'},
+  {label: 'Orange', value: '15'},
+  {label: 'Papaya', value: '16'},
+  {label: 'Quince', value: '17'},
+];
+
+/**
+ * Mantine [Select](https://mantine.dev/core/select/) component stories.
+ * See detailed uses in [Mantine's Select page](https://mantine.dev/core/select/)
+ */
+const meta: Meta<typeof Select> = {
+  title: 'Common/Select',
+  component: Select,
+  decorators: [
+    (Story) => (
+      <div style={{maxWidth: 400, padding: 40, margin: 'auto'}}>
+        <Story />
+      </div>
+    ),
+  ],
+  parameters: {
+    controls: {expanded: false},
+  },
+  argTypes: {
+    label: {
+      description: 'Select label',
+      control: {type: 'text'},
+    },
+    placeholder: {
+      description: 'Placeholder for the input',
+      control: {type: 'text'},
+    },
+    size: {
+      description: 'Select size',
+      options: sizes,
+      control: {type: 'select'},
+    },
+    clearable: {
+      description: 'Add clear button to the right side of the input',
+      control: 'boolean',
+    },
+    searchable: {
+      description: 'Filter items by typing',
+      control: 'boolean',
+    },
+    data: {
+      description: 'Array of objects with label and value',
+      control: {type: 'object'},
+    },
+  },
+  args: {
+    label: 'Select',
+    placeholder: 'Pick one',
+    size: 'md',
+    clearable: false,
+    searchable: false,
+    data,
+  },
+};
+
+type Story = StoryObj<typeof Select>;
+
+/**
+ * Basic usage of Select component
+ */
+export const Basic: Story = {};
+
+/**
+ * Different sizes of the Select component
+ */
+export const Sizes = () => (
+  <Stack gap='md'>
+    {sizes.map((size) => (
+      <Select
+        key={size}
+        label={size}
+        placeholder='Pick one'
+        data={data}
+        size={size}
+      />
+    ))}
+  </Stack>
+);
+
+/**
+ * Clear button is added to the right side of the input when an option is selected
+ */
+export const Clearable: Story = {
+  args: {
+    clearable: true,
+    value: data[3].value,
+  },
+};
+
+/**
+ * Items are filtered by the input when typing the value. Custom icon can be added to the `leftSection` property
+ */
+export const Searchable: Story = {
+  args: {
+    searchable: true,
+  },
+};
+
+/**
+ * Select with large data set and scrollable dropdown
+ */
+export const Scrollable: Story = {
+  args: {
+    data: largeData,
+  },
+};
+
+export default meta;
diff --git a/jsapp/js/components/common/Select.tsx b/jsapp/js/components/common/Select.tsx
new file mode 100644
index 0000000000..e1406e0071
--- /dev/null
+++ b/jsapp/js/components/common/Select.tsx
@@ -0,0 +1,62 @@
+import type {SelectProps, ComboboxItem} from '@mantine/core';
+import {CloseButton, Group, Select as MantineSelect} from '@mantine/core';
+import type {IconSize} from './icon';
+import Icon from './icon';
+import {useState} from 'react';
+
+declare module '@mantine/core/lib/components/Select' {
+  /** @deprecated use Kobo implementation instead. (deprecating a new interface because can't augment variables) */
+  export interface Select {}
+}
+
+const iconSizeMap: Record<string, IconSize> = {
+  xs: 'xxs',
+  sm: 'xs',
+  md: 's',
+  lg: 'm',
+  xl: 'l',
+};
+
+export const Select = (props: SelectProps) => {
+  const [value, setValue] = useState<string | null>(props.value || null);
+  const [isOpened, setIsOpened] = useState(
+    props.defaultDropdownOpened || false
+  );
+
+  const onChange = (newValue: string | null, option: ComboboxItem) => {
+    setValue(newValue);
+    props.onChange?.(newValue, option);
+  };
+
+  const clear = () => {
+    setValue(null);
+    props.onClear?.();
+  };
+
+  const iconSize =
+    typeof props.size === 'string' ? iconSizeMap[props.size] : 's';
+
+  const clearButton =
+    props.clearable && value && !props.disabled && !props.readOnly ? (
+      <CloseButton
+        onClick={clear}
+        icon={<Icon name='close' size={iconSize} />}
+      />
+    ) : null;
+
+  return (
+    <MantineSelect
+      {...props}
+      value={value}
+      onChange={onChange}
+      onDropdownOpen={() => setIsOpened(true)}
+      onDropdownClose={() => setIsOpened(false)}
+      rightSection={
+        <Group gap={1} mr='sm'>
+          {clearButton}
+          <Icon name={isOpened ? 'angle-up' : 'angle-down'} size={iconSize} />
+        </Group>
+      }
+    />
+  );
+};
diff --git a/jsapp/js/components/common/koboSelect.stories.tsx b/jsapp/js/components/common/koboSelect.stories.tsx
index a097c8f044..7ba9bce701 100644
--- a/jsapp/js/components/common/koboSelect.stories.tsx
+++ b/jsapp/js/components/common/koboSelect.stories.tsx
@@ -3,7 +3,7 @@ import type {ComponentStory, ComponentMeta} from '@storybook/react';
 import KoboSelect from 'js/components/common/koboSelect';
 
 export default {
-  title: 'common/KoboSelect',
+  title: 'commonDeprecated/KoboSelect',
   component: KoboSelect,
   argTypes: {
     selectedOption: {
diff --git a/jsapp/js/theme/kobo/Select.module.css b/jsapp/js/theme/kobo/Select.module.css
new file mode 100644
index 0000000000..d9603363a4
--- /dev/null
+++ b/jsapp/js/theme/kobo/Select.module.css
@@ -0,0 +1,43 @@
+.input {
+  border-color: var(--mantine-color-gray-6);
+
+  &::placeholder {
+    color: var(--mantine-color-gray-4);
+    opacity: 1;
+  }
+}
+
+.dropdown {
+  border-color: var(--mantine-color-gray-6);
+}
+
+.option {
+  border-radius: 0;
+  color: var(--mantine-color-gray-1);
+}
+
+.option:hover {
+  background-color: var(--mantine-color-blue-9);
+}
+
+.option[data-combobox-selected],
+.option[data-combobox-active] {
+  background-color: var(--mantine-color-blue-9);
+}
+
+.section[data-position='right'] {
+  width: auto;
+}
+
+.section i {
+  display: flex;
+  color: var(--mantine-color-gray-4);
+}
+
+.section button {
+  background-color: transparent;
+}
+
+.section button:hover {
+  background-color: transparent;
+}
diff --git a/jsapp/js/theme/kobo/Select.tsx b/jsapp/js/theme/kobo/Select.tsx
new file mode 100644
index 0000000000..22263da54a
--- /dev/null
+++ b/jsapp/js/theme/kobo/Select.tsx
@@ -0,0 +1,15 @@
+import {Select} from '@mantine/core';
+
+import classes from './Select.module.css';
+
+export const SelectThemeKobo = Select.extend({
+  classNames: classes,
+  defaultProps: {
+    withCheckIcon: false,
+    allowDeselect: false,
+    comboboxProps: {
+      offset: 0,
+      dropdownPadding: 0,
+    },
+  },
+});
diff --git a/jsapp/js/theme/kobo/index.ts b/jsapp/js/theme/kobo/index.ts
index 6a485c558d..30167bd159 100644
--- a/jsapp/js/theme/kobo/index.ts
+++ b/jsapp/js/theme/kobo/index.ts
@@ -5,6 +5,7 @@ import {TableThemeKobo} from './Table';
 import {TooltipThemeKobo} from './Tooltip';
 import {MenuThemeKobo} from './Menu';
 import {AlertThemeKobo} from './Alert';
+import {SelectThemeKobo} from './Select';
 
 export const themeKobo = createTheme({
   primaryColor: 'blue',
@@ -68,7 +69,7 @@ export const themeKobo = createTheme({
       'hsl(30, 100%, 90%)', // #ffe8cc ($kobo-light-amber)
       '#000',
       '#000',
-    ]
+    ],
   },
 
   // Typography
@@ -107,5 +108,6 @@ export const themeKobo = createTheme({
     Menu: MenuThemeKobo,
     Tooltip: TooltipThemeKobo,
     Table: TableThemeKobo,
+    Select: SelectThemeKobo,
   },
 });