diff --git a/docker-compose.local.yml b/docker-compose.local.yml
index 9f3497329d..9f4805adcf 100644
--- a/docker-compose.local.yml
+++ b/docker-compose.local.yml
@@ -53,6 +53,8 @@ x-variables: &variables
 
     GK_SESSION_IN_REDIS: "true"
 
+    GK_SITE_ADMINISTRATORS: "1"
+
 services:
 
   adminer:
diff --git a/tests-qa/acceptance/120_admin/10_impersonation.robot b/tests-qa/acceptance/120_admin/10_impersonation.robot
new file mode 100644
index 0000000000..00e705e532
--- /dev/null
+++ b/tests-qa/acceptance/120_admin/10_impersonation.robot
@@ -0,0 +1,98 @@
+*** Settings ***
+Resource        ../ressources/Authentication.robot
+Resource        ../ressources/vars/Urls.robot
+Resource        ../ressources/Moves.robot
+Variables       ../ressources/vars/users.yml
+Variables       ../ressources/vars/geokrety.yml
+Variables       ../ressources/vars/waypoints.yml
+Suite Setup     Suite Setup
+
+*** Variables ***
+
+*** Test Cases ***
+
+Anonymous users cannot impersonate
+    Go To Url                               ${PAGE_HOME_URL_EN}
+    Page Should Not Contain Element         ${NAVBAR_ACTIONS_IMPERSONATE_USER_START_LINK}
+    Page Should Not Contain Element         ${NAVBAR_ACTIONS_IMPERSONATE_USER_STOP_LINK}
+
+    Go To Url                               ${PAGE_USER_3_PROFILE_URL}
+    Page Should Not Contain Element         ${NAVBAR_ACTIONS_IMPERSONATE_USER_START_LINK}
+    Page Should Not Contain Element         ${NAVBAR_ACTIONS_IMPERSONATE_USER_STOP_LINK}
+
+    Go To Url                               ${PAGE_ADMIN_IMPERSONATE_USER_START}    userid=${USER_3.id}    redirect=${PAGE_SIGN_IN_URL}
+    Go To Url                               ${PAGE_ADMIN_IMPERSONATE_USER_STOP}     userid=${USER_3.id}    redirect=${PAGE_SIGN_IN_URL}
+
+
+Other users cannot impersonate
+    Sign In ${USER_2.name} Fast
+
+    Go To Url                               ${PAGE_HOME_URL_EN}
+    Page Should Not Contain Element         ${NAVBAR_ACTIONS_IMPERSONATE_USER_START_LINK}
+    Page Should Not Contain Element         ${NAVBAR_ACTIONS_IMPERSONATE_USER_STOP_LINK}
+
+    Go To Url                               ${PAGE_USER_3_PROFILE_URL}
+    Page Should Not Contain Element         ${NAVBAR_ACTIONS_IMPERSONATE_USER_START_LINK}
+    Page Should Not Contain Element         ${NAVBAR_ACTIONS_IMPERSONATE_USER_STOP_LINK}
+
+    Go To Url                               ${PAGE_ADMIN_IMPERSONATE_USER_START}    userid=${USER_3.id}    redirect=${PAGE_HOME_URL_EN}
+    Page Should Contain                     HTTP 403
+    Go To Url                               ${PAGE_ADMIN_IMPERSONATE_USER_STOP}     userid=${USER_3.id}    redirect=${PAGE_HOME_URL_EN}
+    Page Should Contain                     HTTP 403
+
+
+Admin users can impersonate
+    Sign In ${USER_1.name} Fast
+
+    Go To Url                               ${PAGE_HOME_URL_EN}
+    Page Should Not Contain Element         ${NAVBAR_ACTIONS_IMPERSONATE_USER_START_LINK}
+    Page Should Not Contain Element         ${NAVBAR_ACTIONS_IMPERSONATE_USER_STOP_LINK}
+
+    Go To Url                               ${PAGE_USER_1_PROFILE_URL}
+    Page Should Not Contain Element         ${NAVBAR_ACTIONS_IMPERSONATE_USER_START_LINK}
+    Page Should Not Contain Element         ${NAVBAR_ACTIONS_IMPERSONATE_USER_STOP_LINK}
+
+    Go To Url                               ${PAGE_USER_3_PROFILE_URL}
+    Page Should Contain Element             ${NAVBAR_ACTIONS_IMPERSONATE_USER_START_LINK}
+    Page Should Not Contain Element         ${NAVBAR_ACTIONS_IMPERSONATE_USER_STOP_LINK}
+    Element Text Should Be                  ${NAVBAR_PROFILE_LINK}    ${USER_1.name}
+
+    Go To Url                               ${PAGE_ADMIN_IMPERSONATE_USER_START}    userid=${USER_3.id}    redirect=${PAGE_USER_3_PROFILE_URL}
+    Page Should Not Contain Element         ${NAVBAR_ACTIONS_IMPERSONATE_USER_START_LINK}
+    Page Should Contain Element             ${NAVBAR_ACTIONS_IMPERSONATE_USER_STOP_LINK}
+    Element Text Should Be                  ${NAVBAR_PROFILE_LINK}    ${USER_3.name}
+
+    Go To Url                               ${PAGE_HOME_URL_EN}
+    Page Should Not Contain Element         ${NAVBAR_ACTIONS_IMPERSONATE_USER_START_LINK}
+    Page Should Contain Element             ${NAVBAR_ACTIONS_IMPERSONATE_USER_STOP_LINK}
+
+    Go To Url                               ${PAGE_USER_1_PROFILE_URL}
+    Page Should Contain Element             ${NAVBAR_ACTIONS_IMPERSONATE_USER_START_LINK}
+    Page Should Contain Element             ${NAVBAR_ACTIONS_IMPERSONATE_USER_STOP_LINK}
+
+    Go To Url                               ${PAGE_USER_2_PROFILE_URL}
+    Page Should Contain Element             ${NAVBAR_ACTIONS_IMPERSONATE_USER_START_LINK}
+    Page Should Contain Element             ${NAVBAR_ACTIONS_IMPERSONATE_USER_STOP_LINK}
+
+    Click Element                           ${NAVBAR_ACTIONS_IMPERSONATE_USER_START_LINK}
+    Element Text Should Be                  ${NAVBAR_PROFILE_LINK}    ${USER_2.name}
+    Page Should Not Contain Element         ${NAVBAR_ACTIONS_IMPERSONATE_USER_START_LINK}
+    Page Should Contain Element             ${NAVBAR_ACTIONS_IMPERSONATE_USER_STOP_LINK}
+
+    Go To Url                               ${PAGE_USER_3_PROFILE_URL}
+    Element Text Should Be                  ${NAVBAR_PROFILE_LINK}    ${USER_2.name}
+    Page Should Contain Element             ${NAVBAR_ACTIONS_IMPERSONATE_USER_START_LINK}
+    Page Should Contain Element             ${NAVBAR_ACTIONS_IMPERSONATE_USER_STOP_LINK}
+
+    Click Element                           ${NAVBAR_ACTIONS_IMPERSONATE_USER_STOP_LINK}
+    Location Should Be                      ${PAGE_USER_2_PROFILE_URL}
+    Element Text Should Be                  ${NAVBAR_PROFILE_LINK}    ${USER_1.name}
+    Page Should Contain Element             ${NAVBAR_ACTIONS_IMPERSONATE_USER_START_LINK}
+    Page Should Not Contain Element         ${NAVBAR_ACTIONS_IMPERSONATE_USER_STOP_LINK}
+
+*** Keywords ***
+
+Suite Setup
+    Clear Database And Seed ${3} users
+    Seed ${1} geokrety owned by ${1}
+    Sign Out Fast
diff --git a/tests-qa/acceptance/ressources/ComponentsLocator.robot b/tests-qa/acceptance/ressources/ComponentsLocator.robot
index 66f937199a..fcb52176f3 100644
--- a/tests-qa/acceptance/ressources/ComponentsLocator.robot
+++ b/tests-qa/acceptance/ressources/ComponentsLocator.robot
@@ -22,6 +22,8 @@ ${NAVBAR_ACTIONS_CREATE_GEOKRET_LINK}       //*[@id="navbar-actions-create"]
 ${NAVBAR_ACTIONS_CLAIM_GEOKRET_LINK}        //*[@id="navbar-actions-claim"]
 ${NAVBAR_ACTIONS_SEARCH_LINK}               //*[@id="navbar-actions-search"]
 ${NAVBAR_ACTIONS_PHOTO_GALLERY_LINK}        //*[@id="navbar-actions-gallery"]
+${NAVBAR_ACTIONS_IMPERSONATE_USER_START_LINK}    //*[@id="navbar-impersonate-start"]
+${NAVBAR_ACTIONS_IMPERSONATE_USER_STOP_LINK}     //*[@id="navbar-impersonate-stop"]
 
 
 ################
diff --git a/tests-qa/acceptance/ressources/vars/Urls.robot b/tests-qa/acceptance/ressources/vars/Urls.robot
index 5a2faf0bd4..024207cbec 100644
--- a/tests-qa/acceptance/ressources/vars/Urls.robot
+++ b/tests-qa/acceptance/ressources/vars/Urls.robot
@@ -107,6 +107,13 @@ ${PAGE_LEGACY_API_EXPORT_URL}           ${GK_URL}/api/v1/export
 ${PAGE_LEGACY_API_EXPORT2_URL}          ${GK_URL}/api/v1/export2
 ${PAGE_LEGACY_API_EXPORT_OC_URL}        ${GK_URL}/api/v1/export_oc
 
+# ADMIN
+${PAGE_ADMIN_HOME}                      ${PAGE_HOME_URL}/admin
+
+# IMPERSONATION
+${PAGE_ADMIN_IMPERSONATE_USER_START}    ${PAGE_ADMIN_HOME}/impersonate/\${params.userid}/start
+${PAGE_ADMIN_IMPERSONATE_USER_STOP}     ${PAGE_ADMIN_HOME}/impersonate/stop
+
 *** Keywords ***
 
 Go To Url
diff --git a/website/app-templates/smarty/navbar-profile.tpl b/website/app-templates/smarty/navbar-profile.tpl
index ad276d4168..94c4d203f2 100644
--- a/website/app-templates/smarty/navbar-profile.tpl
+++ b/website/app-templates/smarty/navbar-profile.tpl
@@ -1,6 +1,15 @@
 {if $f3->get('SESSION.IS_LOGGED_IN') && !is_null($current_user)}
+
 {if $f3->get('SESSION.IS_ADMIN')}
-<li><a id="navbar-profile-admin" href="{'admin_home'|alias}">{fa icon="support"} {t}Admin{/t}</a></li>
+<li><a id="navbar-profile-admin" href="{'admin_home'|alias}" class="navbar-admin">{fa icon="support"} {t}Admin{/t}</a></li>
+    {if $f3->get('SESSION.ADMIN_ID') }
+        {if isset($user) && $user->id !== $f3->get('SESSION.CURRENT_USER')}
+            <li><a id="navbar-impersonate-start" href="{'admin_impersonate_user'|alias:sprintf('userid=%d', $user->id)}" title="Impersonate {$user->username} account" class="navbar-admin">{fa icon="user-secret"}</a></li>
+        {/if}
+        {if $f3->get('SESSION.ADMIN_IMPERSONATING') === true}
+            <li><a id="navbar-impersonate-stop" href="{'admin_impersonate_user_stop'|alias}" title="Stop impersonating {$f3->get('SESSION.CURRENT_USERNAME')} account" class="navbar-admin">{fa icon="user-times"}</a></li>
+        {/if}
+    {/if}
 {/if}
 <li>
     <a id="navbar-profile-profile" href="{'user_details'|alias:sprintf('userid=%d', $f3->get('SESSION.CURRENT_USER'))}">
diff --git a/website/app/GeoKrety/Controller/Admin/Impersonate.php b/website/app/GeoKrety/Controller/Admin/Impersonate.php
new file mode 100644
index 0000000000..bab5a5ecbe
--- /dev/null
+++ b/website/app/GeoKrety/Controller/Admin/Impersonate.php
@@ -0,0 +1,36 @@
+<?php
+
+namespace GeoKrety\Controller\Admin;
+
+use GeoKrety\Controller\Admin\Traits\CurrentAdminLoader;
+use GeoKrety\Controller\Base;
+use GeoKrety\Model\User;
+
+class Impersonate extends Base {
+    use CurrentAdminLoader;
+
+    public function get(\Base $f3) {
+        $user = new User();
+        $user->load(['id = ?', $f3->get('PARAMS.userid')]);
+        if ($user->dry()) {
+            $f3->error(404, _('This user does not exist.'));
+        }
+
+        $f3->set('CURRENT_USER', $user->id);
+        $f3->set('SESSION.CURRENT_USER', $user->id);
+        $f3->set('SESSION.CURRENT_USERNAME', $user->username);
+        $f3->set('SESSION.ADMIN_IMPERSONATING', true);
+
+        $f3->reroute(['user_details', ['userid' => $user->id]]);
+    }
+
+    public function stop(\Base $f3) {
+        $user_id = $f3->get('CURRENT_USER');
+        $f3->set('CURRENT_USER', $this->currentAdmin->id);
+        $f3->set('SESSION.CURRENT_USER', $this->currentAdmin->id);
+        $f3->set('SESSION.CURRENT_USERNAME', $this->currentAdmin->username);
+        $f3->clear('SESSION.ADMIN_IMPERSONATING');
+
+        $f3->reroute(['user_details', ['userid' => $user_id]]);
+    }
+}
diff --git a/website/app/GeoKrety/Controller/Admin/Traits/CurrentAdminLoader.php b/website/app/GeoKrety/Controller/Admin/Traits/CurrentAdminLoader.php
new file mode 100644
index 0000000000..b2e49c334b
--- /dev/null
+++ b/website/app/GeoKrety/Controller/Admin/Traits/CurrentAdminLoader.php
@@ -0,0 +1,33 @@
+<?php
+
+namespace GeoKrety\Controller\Admin\Traits;
+
+use GeoKrety\Model\User;
+use GeoKrety\Service\Smarty;
+
+/**
+ * Load the currently connected admin into `currentAdmin` variable in php and smarty.
+ */
+trait CurrentAdminLoader {
+    protected User $currentAdmin;
+
+    public function beforeRoute(\Base $f3) {
+        parent::beforeRoute($f3);
+
+        if (!$f3->get('SESSION.IS_LOGGED_IN')) {
+            $f3->error(401);
+        }
+
+        $user = new User();
+        $user->load(['id = ?', $f3->get('SESSION.ADMIN_ID')]);
+        if ($user->dry()) {
+            $f3->error(404, _('This user does not exist.'));
+        }
+        $this->currentAdmin = $user;
+        Smarty::assign('currentAdmin', $this->currentAdmin);
+
+        if (method_exists($this, '_beforeRoute')) {
+            $this->_beforeRoute($f3);
+        }
+    }
+}
diff --git a/website/app/GeoKrety/Controller/Pages/Base.php b/website/app/GeoKrety/Controller/Pages/Base.php
index 5221ed7c1d..63f29b41ac 100644
--- a/website/app/GeoKrety/Controller/Pages/Base.php
+++ b/website/app/GeoKrety/Controller/Pages/Base.php
@@ -22,6 +22,7 @@ abstract class Base {
         'devel_mail',
         'devel_mail_delete',
         'devel_mail_delete_all',
+        'admin_impersonate_user_stop',
     ];
 
     protected ?User $current_user = null;
diff --git a/website/app/GeoKrety/Controller/Pages/Login.php b/website/app/GeoKrety/Controller/Pages/Login.php
index 165c9e5b82..c2f848a046 100644
--- a/website/app/GeoKrety/Controller/Pages/Login.php
+++ b/website/app/GeoKrety/Controller/Pages/Login.php
@@ -78,6 +78,9 @@ public function login(\Base $f3) {
      * @param bool        $redirect Redirect to GOTO url
      */
     public static function connectUser(\Base $f3, User $user, ?string $method = null, bool $redirect = true) {
+        $user->touch('last_login_datetime');
+        $user->save();
+
         $f3->set('CURRENT_USER', $user->id);
         $f3->set('SESSION.CURRENT_USER', $user->id);
         $f3->set('SESSION.CURRENT_USERNAME', $user->username);
@@ -85,9 +88,11 @@ public static function connectUser(\Base $f3, User $user, ?string $method = null
         if (in_array($user->id, GK_SITE_ADMINISTRATORS)) {
             $f3->set('SESSION.user.group', AuthGroup::AUTH_LEVEL_ADMINISTRATORS);
             $f3->set('SESSION.IS_ADMIN', true);
+            $f3->set('SESSION.ADMIN_ID', $user->id);
         } else {
             $f3->set('SESSION.user.group', AuthGroup::AUTH_LEVEL_AUTHENTICATED);
             $f3->set('SESSION.IS_ADMIN', false);
+            $f3->clear('SESSION.ADMIN_ID');
         }
         Smarty::assign('current_user', $user);
         Event::instance()->emit("user.login.$method-effective", $user);
diff --git a/website/app/admin.ini b/website/app/admin.ini
index 6ed3d462a6..4cc2731b4a 100644
--- a/website/app/admin.ini
+++ b/website/app/admin.ini
@@ -11,6 +11,9 @@ GET @admin_news_list: /admin/news = \GeoKrety\Controller\Admin\NewsList->get
 GET @admin_news_list_paginate: /admin/news/page/@page = \GeoKrety\Controller\Admin\NewsList->get
 GET @admin_news_view: /admin/news/@newsid = \GeoKrety\Controller\Admin\NewsView->get
 
+GET @admin_impersonate_user: /admin/impersonate/@userid/start = \GeoKrety\Controller\Admin\Impersonate->get
+GET @admin_impersonate_user_stop: /admin/impersonate/stop = \GeoKrety\Controller\Admin\Impersonate->stop
+
 ; statistics
 GET @statistics_waypoints_restart: /admin/statistics/waypoints/@service_id/restart = \GeoKrety\Controller\Statistics->force_complete_synchronization
 
diff --git a/website/public/app-ui/css/app.scss b/website/public/app-ui/css/app.scss
index 78b1259e9e..8d1b3d9ddb 100644
--- a/website/public/app-ui/css/app.scss
+++ b/website/public/app-ui/css/app.scss
@@ -44,8 +44,8 @@
   border: 0;
 }
 
-#navbar-profile-admin {
-  color: orangered;
+.navbar-admin {
+  color: orangered !important;
 }
 
 .leaflet-container {