diff --git a/.github/workflows/matrix-concurrency-external.yml b/.github/workflows/matrix-concurrency-external.yml
new file mode 100644
index 0000000..f678b2e
--- /dev/null
+++ b/.github/workflows/matrix-concurrency-external.yml
@@ -0,0 +1,19 @@
+name: MatrixConcurrencyExternal
+
+on: 
+  pull_request:
+    types: [closed]
+    branches: [main]
+  workflow_dispatch:
+
+jobs:
+  pre-matrix-job:
+    name: Pre Matrix
+    concurrency: matrix_concurrency_external_${{ github.event.pull_request.number }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Do some stuff outside the matrix
+        run: |
+          echo "Do some stuff $(date +%T)"
+          sleep 30
+          echo "Done some stuff $(date +%T)"
diff --git a/.github/workflows/matrix-concurrency.yml b/.github/workflows/matrix-concurrency.yml
new file mode 100644
index 0000000..cc0fafa
--- /dev/null
+++ b/.github/workflows/matrix-concurrency.yml
@@ -0,0 +1,32 @@
+name: MatrixConcurrency
+concurrency: matrix_concurrency_${{ github.ref_name }}
+
+on: 
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  pre-matrix-job:
+    name: Pre Matrix
+    concurrency: matrix_concurrency_external_${{ github.event.pull_request.number }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Do some stuff in outside the matrix
+        run: |
+          echo "Do some stuff $(date +%T)"
+          sleep 30
+          echo "Done some stuff $(date +%T)"
+
+  matrix-job:
+    name: Matrix Concurrency
+    runs-on: ubuntu-latest
+    strategy:
+      matrix: 
+        environment: [qa,staging,production,sandbox]
+      max-parallel: 1
+    steps:
+      - name: Do some stuff in ${{ matrix.environment }}
+        run: |
+          echo "Do some stuff $(date +%T)"
+          sleep 30
+          echo "Done some stuff $(date +%T)"
diff --git a/.github/workflows/pwsh-switch-parameter.yml b/.github/workflows/pwsh-switch-parameter.yml
index d9c2e8d..9069413 100644
--- a/.github/workflows/pwsh-switch-parameter.yml
+++ b/.github/workflows/pwsh-switch-parameter.yml
@@ -1,7 +1,6 @@
 name: PowerShellSwitchParameter
 
 on: 
-  pull_request:
   workflow_dispatch:
 
 jobs: