diff --git a/itou/templates/users/includes/gps_group.html b/itou/templates/users/includes/gps_group.html
index d7a1ceac9e..e9067b5670 100644
--- a/itou/templates/users/includes/gps_group.html
+++ b/itou/templates/users/includes/gps_group.html
@@ -3,7 +3,17 @@
 {% load matomo %}
 
 <div class="c-box mb-3 mb-lg-5" id="gps_intervenants">
-    <h2 class="border-bottom pb-3">Intervenant{{ gps_memberships|length|pluralizefr }}</h2>
+    <div class="border-bottom">
+        <div class="d-flex flex-column flex-md-row gap-3 justify-content-md-between align-items-start">
+            <h2>Intervenant{{ gps_memberships|length|pluralizefr }}</h2>
+            <div class="d-flex flex-column flex-md-row gap-3" role="group" aria-label="Actions sur les participants">
+                <a href="{{ request_new_participant_form_url }}" id="request-new-participant-link" class="btn btn-sm btn-ico btn-primary mt-3 mt-md-0">
+                    <i class="ri-user-add-line" aria-hidden="true"></i>
+                    <span>Ajouter un intervenant existant</span>
+                </a>
+            </div>
+        </div>
+    </div>
     <ul class="list-unstyled p-0 m-0">
         {% for membership in gps_memberships %}
             <li class="c-box--results__header px-0 gps_intervenant">
diff --git a/itou/www/gps/views.py b/itou/www/gps/views.py
index f92a8ada7e..729e8701a6 100644
--- a/itou/www/gps/views.py
+++ b/itou/www/gps/views.py
@@ -1,3 +1,5 @@
+import urllib.parse
+
 from django.contrib.auth.mixins import LoginRequiredMixin
 from django.core.exceptions import PermissionDenied
 from django.db.models import Count
@@ -146,6 +148,24 @@ def get_context_data(self, **kwargs):
 
         membership = next(m for m in gps_memberships if m.member == self.request.user)
 
+        request_new_participant_form_url = (
+            "https://formulaires.gps.inclusion.gouv.fr/ajouter-intervenant?"
+            + urllib.parse.urlencode(
+                {
+                    "user_name": self.request.user.get_full_name(),
+                    "user_id": self.request.user.pk,
+                    "user_email": self.request.user.email,
+                    "user_organization_name": getattr(self.request.current_organization, "display_name", ""),
+                    "user_organization_id": getattr(self.request.current_organization, "pk", ""),
+                    "user_type": self.request.user.kind,
+                    "beneficiary_name": self.object.get_full_name(),
+                    "beneficiary_id": self.object.pk,
+                    "beneficiary_email": self.object.email,
+                    "success_url": self.request.build_absolute_uri(),
+                }
+            )
+        )
+
         context = context | {
             "back_url": back_url,
             "gps_memberships": gps_memberships,
@@ -154,6 +174,7 @@ def get_context_data(self, **kwargs):
             "profile": self.object.jobseeker_profile,
             "render_advisor_matomo_option": matomo_option,
             "matomo_option": "coordonnees-conseiller-" + (matomo_option if matomo_option else "ailleurs"),
+            "request_new_participant_form_url": request_new_participant_form_url,
         }
 
         return context
diff --git a/tests/gps/__snapshots__/test_views.ambr b/tests/gps/__snapshots__/test_views.ambr
index f0ab3091ec..5373c006ef 100644
--- a/tests/gps/__snapshots__/test_views.ambr
+++ b/tests/gps/__snapshots__/test_views.ambr
@@ -107,7 +107,17 @@
   
   
   <div class="c-box mb-3 mb-lg-5" id="gps_intervenants">
-      <h2 class="border-bottom pb-3">Intervenant</h2>
+      <div class="border-bottom">
+          <div class="d-flex flex-column flex-md-row gap-3 justify-content-md-between align-items-start">
+              <h2>Intervenant</h2>
+              <div aria-label="Actions sur les participants" class="d-flex flex-column flex-md-row gap-3" role="group">
+                  <a aria-label="Ajouter un intervenant existant" class="btn btn-sm btn-ico btn-primary mt-3 mt-md-0" href="https://formulaires.gps.inclusion.gouv.fr/ajouter-intervenant?user_name=Pierre+DUPONT&amp;user_id=[PK of user]&amp;user_email=pierre.dupont%40test.local&amp;user_organization_name=Les+Olivades&amp;user_organization_id=[PK of organization]&amp;user_type=prescriber&amp;beneficiary_name=Jane+DOE&amp;beneficiary_id=[PK of beneficiary]&amp;beneficiary_email=jane.doe%40test.local&amp;success_url=http%3A%2F%2Ftestserver%2Fgps%2Fdetails%2F7614fc4b-aef9-4694-ab17-12324300180a" id="request-new-participant-link">
+                      <i aria-hidden="true" class="ri-user-add-line"></i>
+                      <span>Ajouter un intervenant existant</span>
+                  </a>
+              </div>
+          </div>
+      </div>
       <ul class="list-unstyled p-0 m-0">
           
               <li class="c-box--results__header px-0 gps_intervenant">
diff --git a/tests/gps/test_views.py b/tests/gps/test_views.py
index 2c4b54c3fa..d51e718bfb 100644
--- a/tests/gps/test_views.py
+++ b/tests/gps/test_views.py
@@ -308,7 +308,19 @@ def test_beneficiary_details(client, snapshot):
 
     user_details_url = reverse("gps:user_details", kwargs={"public_id": beneficiary.public_id})
     response = client.get(user_details_url)
-    html_details = parse_response_to_soup(response, selector="#beneficiary_details_container")
+    html_details = parse_response_to_soup(
+        response,
+        selector="#beneficiary_details_container",
+        replace_in_attr=[
+            ("href", f"user_id={prescriber.pk}", "user_id=[PK of user]"),
+            (
+                "href",
+                f"user_organization_id={prescriber.prescribermembership_set.get().pk}",
+                "user_organization_id=[PK of organization]",
+            ),
+            ("href", f"beneficiary_id={beneficiary.pk}", "beneficiary_id=[PK of beneficiary]"),
+        ],
+    )
     assert str(html_details) == snapshot
     user_dropdown_menu = parse_response_to_soup(response, selector="div#dashboardUserDropdown")
 
@@ -319,7 +331,10 @@ def test_beneficiary_details(client, snapshot):
     prescriber.phone = ""
     prescriber.save()
     response = client.get(user_details_url)
-    assert "Téléphone non renseigné" in str(response.content.decode())
+    assertContains(response, "Téléphone non renseigné")
+
+    assertContains(response, "Ajouter un intervenant")
+    assertContains(response, "https://formulaires.gps.inclusion.gouv.fr/ajouter-intervenant")
 
 
 def test_remove_members_from_group(client):