diff --git a/frontend/package.json b/frontend/package.json
index f51ad52f13..10d9a7ce46 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -46,6 +46,7 @@
     "@mui/material": "5.15.3",
     "@mui/x-date-pickers": "^7.0.0",
     "@tanstack/react-table": "^8.10.7",
+    "@tanstack/react-virtual": "^3.11.3",
     "@testing-library/dom": "10.4.0",
     "@testing-library/jest-dom": "6.6.3",
     "@testing-library/react": "16.1.0",
diff --git a/frontend/src/component/admin/groups/GroupForm/GroupFormUsersSelect/AutcompleteVirtual.tsx b/frontend/src/component/admin/groups/GroupForm/GroupFormUsersSelect/AutcompleteVirtual.tsx
new file mode 100644
index 0000000000..770aeb1b04
--- /dev/null
+++ b/frontend/src/component/admin/groups/GroupForm/GroupFormUsersSelect/AutcompleteVirtual.tsx
@@ -0,0 +1,84 @@
+import { useVirtualizer } from '@tanstack/react-virtual';
+import {
+    Children,
+    type HTMLAttributes,
+    type ReactElement,
+    cloneElement,
+    forwardRef,
+    useRef,
+} from 'react';
+import { Autocomplete, type AutocompleteProps } from '@mui/material';
+
+const ListboxComponent = forwardRef<
+    HTMLDivElement,
+    HTMLAttributes<HTMLElement>
+>(function ListboxComponent(props, ref) {
+    const { children, ...other } = props;
+    const parentRef = useRef(null);
+    const items = Children.toArray(children);
+
+    const rowVirtualizer = useVirtualizer({
+        count: Children.count(children),
+        getScrollElement: () => parentRef.current,
+        estimateSize: () => 56,
+        overscan: 3,
+    });
+
+    return (
+        <div ref={ref}>
+            <div ref={parentRef} {...other}>
+                <ul
+                    style={{
+                        height: `${rowVirtualizer.getTotalSize()}px`,
+                        width: '100%',
+                        position: 'relative',
+                    }}
+                >
+                    {rowVirtualizer.getVirtualItems().map((virtualRow) => {
+                        const element = items[virtualRow.index] as ReactElement;
+
+                        if (!element) {
+                            return null;
+                        }
+
+                        const inlineStyle = {
+                            position: 'absolute',
+                            left: 0,
+                            width: '100%',
+                            top: `${virtualRow.start}px`,
+                        };
+
+                        return cloneElement(element, {
+                            ref: rowVirtualizer.measureElement,
+                            key: virtualRow.key,
+                            'data-index': virtualRow.index,
+                            style: inlineStyle,
+                        });
+                    })}
+                </ul>
+            </div>
+        </div>
+    );
+});
+
+type TProps<T, M extends boolean | undefined> = Omit<
+    AutocompleteProps<T, M, boolean, false>,
+    'autoHighlight' | 'disableListWrap' | 'ListboxComponent' | 'groupBy'
+>;
+
+function AutocompleteVirtual<T, M extends boolean | undefined>(
+    props: TProps<T, M>,
+) {
+    const { getOptionLabel, className, ...restAutocompleteProps } = props;
+
+    return (
+        <Autocomplete
+            {...restAutocompleteProps}
+            disableListWrap
+            getOptionLabel={getOptionLabel}
+            ListboxComponent={ListboxComponent}
+        />
+    );
+}
+
+export default AutocompleteVirtual;
diff --git a/frontend/src/component/admin/groups/GroupForm/GroupFormUsersSelect/GroupFormUsersSelect.tsx b/frontend/src/component/admin/groups/GroupForm/GroupFormUsersSelect/GroupFormUsersSelect.tsx
index d615791232..1f48099e13 100644
--- a/frontend/src/component/admin/groups/GroupForm/GroupFormUsersSelect/GroupFormUsersSelect.tsx
+++ b/frontend/src/component/admin/groups/GroupForm/GroupFormUsersSelect/GroupFormUsersSelect.tsx
@@ -9,6 +9,7 @@ import { UG_USERS_ID } from 'utils/testIds';
 import { caseInsensitiveSearch } from 'utils/search';
 import { useServiceAccounts } from 'hooks/api/getters/useServiceAccounts/useServiceAccounts';
 import type { IServiceAccount } from 'interfaces/service-account';
+import AutocompleteVirtual from './AutcompleteVirtual';
 
 const StyledOption = styled('div')(({ theme }) => ({
     display: 'flex',
@@ -32,12 +33,14 @@ const StyledGroupFormUsersSelect = styled('div')(({ theme }) => ({
     },
 }));
 
+const StrechedLi = styled('li')({ width: '100%' });
+
 const renderOption = (
     props: React.HTMLAttributes<HTMLLIElement>,
     option: IUser,
-    selected: boolean,
+    { selected }: { selected: boolean },
 ) => (
-    <li {...props}>
+    <StrechedLi {...props} key={option.id}>
         <Checkbox
             icon={<CheckBoxOutlineBlankIcon fontSize='small' />}
             checkedIcon={<CheckBoxIcon fontSize='small' />}
@@ -52,7 +55,7 @@ const renderOption = (
                     : option.email}
             </span>
         </StyledOption>
-    </li>
+    </StrechedLi>
 );
 
 const renderTags = (value: IGroupUser[]) => (
@@ -76,73 +79,122 @@ export const GroupFormUsersSelect: VFC<IGroupFormUsersSelectProps> = ({
     users,
     setUsers,
 }) => {
-    const { users: usersAll } = useUsers();
-    const { serviceAccounts } = useServiceAccounts();
+    const { users: usersAll, loading: isUsersLoading } = useUsers();
+    const { serviceAccounts, loading: isServiceAccountsLoading } =
+        useServiceAccounts();
 
-    const options = [
-        ...usersAll
-            .map((user: IUser) => ({ ...user, type: 'USERS' }))
-            .sort((a: IUser, b: IUser) => {
-                const aName = a.name || a.username || '';
-                const bName = b.name || b.username || '';
-                return aName.localeCompare(bName);
-            }),
-        ...serviceAccounts
-            .map((serviceAccount: IServiceAccount) => ({
-                ...serviceAccount,
-                type: 'SERVICE ACCOUNTS',
-            }))
-            .sort((a, b) => {
-                const aName = a.name || a.username || '';
-                const bName = b.name || b.username || '';
-                return aName.localeCompare(bName);
-            }),
-    ];
+    const isLoading = isUsersLoading || isServiceAccountsLoading;
+    const options = isLoading
+        ? []
+        : [
+              ...usersAll
+                  .map((user: IUser) => ({ ...user, type: 'USERS' }))
+                  .sort((a: IUser, b: IUser) => {
+                      const aName = a.name || a.username || '';
+                      const bName = b.name || b.username || '';
+                      return aName.localeCompare(bName);
+                  }),
+              ...serviceAccounts
+                  .map((serviceAccount: IServiceAccount) => ({
+                      ...serviceAccount,
+                      type: 'SERVICE ACCOUNTS',
+                  }))
+                  .sort((a, b) => {
+                      const aName = a.name || a.username || '';
+                      const bName = b.name || b.username || '';
+                      return aName.localeCompare(bName);
+                  }),
+          ];
+
+    const isLargeList = options.length > 200;
 
     return (
         <StyledGroupFormUsersSelect>
-            <Autocomplete
-                data-testid={UG_USERS_ID}
-                size='small'
-                multiple
-                limitTags={1}
-                openOnFocus
-                disableCloseOnSelect
-                value={users as UserOption[]}
-                onChange={(event, newValue, reason) => {
-                    if (
-                        event.type === 'keydown' &&
-                        (event as React.KeyboardEvent).key === 'Backspace' &&
-                        reason === 'removeOption'
-                    ) {
-                        return;
-                    }
-                    setUsers(newValue);
-                }}
-                groupBy={(option) => option.type}
-                options={options}
-                renderOption={(props, option, { selected }) =>
-                    renderOption(props, option as UserOption, selected)
-                }
-                filterOptions={(options, { inputValue }) =>
-                    options
-                        .filter(
+            {isLargeList ? (
+                <AutocompleteVirtual
+                    data-testid={UG_USERS_ID}
+                    size='small'
+                    limitTags={1}
+                    openOnFocus
+                    multiple
+                    disableCloseOnSelect
+                    value={users as UserOption[]}
+                    onChange={(event, newValue, reason) => {
+                        if (
+                            event.type === 'keydown' &&
+                            (event as React.KeyboardEvent).key ===
+                                'Backspace' &&
+                            reason === 'removeOption'
+                        ) {
+                            return;
+                        }
+                        setUsers(newValue);
+                    }}
+                    options={options}
+                    renderOption={renderOption}
+                    filterOptions={(options, { inputValue }) =>
+                        options.filter(
                             ({ name, username, email }) =>
                                 caseInsensitiveSearch(inputValue, email) ||
                                 caseInsensitiveSearch(inputValue, name) ||
                                 caseInsensitiveSearch(inputValue, username),
                         )
-                        .slice(0, 100)
-                }
-                isOptionEqualToValue={(option, value) => option.id === value.id}
-                getOptionLabel={(option: UserOption) =>
-                    option.email || option.name || option.username || ''
-                }
-                renderInput={(params) => (
-                    <TextField {...params} label='Select users' />
-                )}
-                renderTags={(value) => renderTags(value)}
-            />
+                    }
+                    isOptionEqualToValue={(option, value) =>
+                        option.id === value.id
+                    }
+                    getOptionLabel={(option: UserOption) =>
+                        option.email || option.name || option.username || ''
+                    }
+                    renderInput={(params) => (
+                        <TextField {...params} label='Select users' />
+                    )}
+                    renderTags={(value) => renderTags(value)}
+                />
+            ) : (
+                <Autocomplete
+                    data-testid={UG_USERS_ID}
+                    size='small'
+                    limitTags={1}
+                    openOnFocus
+                    multiple
+                    disableCloseOnSelect
+                    value={users as UserOption[]}
+                    onChange={(event, newValue, reason) => {
+                        if (
+                            event.type === 'keydown' &&
+                            (event as React.KeyboardEvent).key ===
+                                'Backspace' &&
+                            reason === 'removeOption'
+                        ) {
+                            return;
+                        }
+                        setUsers(newValue);
+                    }}
+                    groupBy={(option) => option.type}
+                    options={options}
+                    renderOption={renderOption}
+                    filterOptions={(options, { inputValue }) =>
+                        options.filter(
+                            ({ name, username, email }) =>
+                                caseInsensitiveSearch(inputValue, email) ||
+                                caseInsensitiveSearch(inputValue, name) ||
+                                caseInsensitiveSearch(inputValue, username),
+                        )
+                    }
+                    isOptionEqualToValue={(option, value) =>
+                        option.id === value.id
+                    }
+                    getOptionLabel={(option: UserOption) =>
+                        option.email || option.name || option.username || ''
+                    }
+                    renderInput={(params) => (
+                        <TextField {...params} label='Select users' />
+                    )}
+                    renderTags={(value) => renderTags(value)}
+                    noOptionsText={isLoading ? 'Loading…' : 'No options'}
+                />
+            )}
         </StyledGroupFormUsersSelect>
     );
 };
diff --git a/frontend/yarn.lock b/frontend/yarn.lock
index 1e2cbbb95c..a86a7f25c3 100644
--- a/frontend/yarn.lock
+++ b/frontend/yarn.lock
@@ -2768,6 +2768,18 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@tanstack/react-virtual@npm:^3.11.3":
+  version: 3.11.3
+  resolution: "@tanstack/react-virtual@npm:3.11.3"
+  dependencies:
+    "@tanstack/virtual-core": "npm:3.11.3"
+  peerDependencies:
+    react: ^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0
+    react-dom: ^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0
+  checksum: 10c0/9718379045ecda92d2c59f3c25699c703d98509ea569d7bfb0dbf78f1e0f46f0023d7a5d3a373fb7cdd4507286c1cf47648b5c0f4b1bdb85b2d2a6c26814b884
+  languageName: node
+  linkType: hard
+
 "@tanstack/table-core@npm:8.20.5":
   version: 8.20.5
   resolution: "@tanstack/table-core@npm:8.20.5"
@@ -2775,6 +2787,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@tanstack/virtual-core@npm:3.11.3":
+  version: 3.11.3
+  resolution: "@tanstack/virtual-core@npm:3.11.3"
+  checksum: 10c0/94701b8d2da9167c8b4ba36bdaff22019b8ebb19224c357c1af16cbc375b39076ecc021a8c9581001607afc921d0a843019cb27168999065dda511c445a1a335
+  languageName: node
+  linkType: hard
+
 "@testing-library/dom@npm:10.4.0":
   version: 10.4.0
   resolution: "@testing-library/dom@npm:10.4.0"
@@ -10165,6 +10184,7 @@ __metadata:
     "@mui/material": "npm:5.15.3"
     "@mui/x-date-pickers": "npm:^7.0.0"
     "@tanstack/react-table": "npm:^8.10.7"
+    "@tanstack/react-virtual": "npm:^3.11.3"
     "@testing-library/dom": "npm:10.4.0"
     "@testing-library/jest-dom": "npm:6.6.3"
     "@testing-library/react": "npm:16.1.0"