diff --git a/.github/workflows/system_tests.yml b/.github/workflows/system_tests.yml
new file mode 100644
index 0000000000..bb6b64426e
--- /dev/null
+++ b/.github/workflows/system_tests.yml
@@ -0,0 +1,26 @@
+name: System Tests
+
+on:
+  push:
+    branches:
+      - main
+  workflow_dispatch: {}
+  schedule:
+    - cron:  '00 03 * * 1-5'
+  pull_request:
+
+jobs:
+  system-tests:
+    uses: DataDog/system-tests/.github/workflows/system-tests.yml@main
+    secrets:
+      DD_API_KEY: ${{ secrets.DD_API_KEY }}
+      TEST_OPTIMIZATION_API_KEY: ${{ secrets.DD_API_KEY }}
+    permissions:
+      contents: read
+      packages: write
+    with:
+      library: php
+      scenarios_groups: tracer-release
+      skip_empty_scenarios: true
+      _system_tests_dev_mode: true
+      push_to_test_optimization: true
diff --git a/.gitlab/generate-package.php b/.gitlab/generate-package.php
index 0836af2a0d..43784c3185 100644
--- a/.gitlab/generate-package.php
+++ b/.gitlab/generate-package.php
@@ -1223,6 +1223,45 @@
       when: always
       paths:
         - .cache/
+  after_script:
+    - |
+      set +e
+      echo "=== Uploading system-tests JUnit results to Test Optimization ==="
+
+      # Check that there are JUnit files to upload
+      ls system-tests/logs*/reportJunit.xml >/dev/null 2>&1
+      if [ $? -ne 0 ]; then echo "No JUnit XML files found, skipping upload"; exit 0; fi
+
+      # Download datadog-ci standalone binary
+      echo "Downloading datadog-ci..."
+      curl -L --fail "https://github.com/DataDog/datadog-ci/releases/latest/download/datadog-ci_linux-x64" -o /tmp/datadog-ci
+      if [ $? -ne 0 ]; then echo "Failed to download datadog-ci"; exit 0; fi
+      chmod +x /tmp/datadog-ci
+
+      # Download and extract Vault CLI
+      echo "Downloading Vault..."
+      VAULT_VERSION="1.20.0"
+      curl -L --fail "https://releases.hashicorp.com/vault/${VAULT_VERSION}/vault_${VAULT_VERSION}_linux_amd64.zip" -o /tmp/vault.zip
+      if [ $? -ne 0 ]; then echo "Failed to download Vault"; exit 0; fi
+      python3 -c "import zipfile; zipfile.ZipFile('/tmp/vault.zip').extractall('/tmp/')"
+      chmod +x /tmp/vault
+
+      # Fetch API key from Vault
+      echo "Fetching API key from Vault..."
+      VAULT_JSON=$(/tmp/vault kv get --format=json "kv/k8s/gitlab-runner/dd-trace-php/datadoghq-api-key" 2>&1)
+      if [ $? -ne 0 ]; then echo "Failed to fetch API key from Vault: $VAULT_JSON"; exit 0; fi
+      export DATADOG_API_KEY=$(echo "$VAULT_JSON" | python3 -c "import sys,json; print(json.loads(sys.stdin.read())['data']['data']['key'])")
+      export DATADOG_SITE="datadoghq.com"
+
+      # Upload JUnit results
+      echo "Uploading JUnit results..."
+      /tmp/datadog-ci junit upload \
+        system-tests/logs*/reportJunit.xml \
+        --service system-tests \
+        --env ci \
+        --verbose \
+        --xpath-tag "test.codeowners=/testcase/properties/property[@name='test.codeowners']"
+      echo "=== Upload complete ==="
   artifacts:
     paths:
       - "system-tests/logs_parametric/"