diff --git a/.github/workflows/black.yaml b/.github/workflows/black.yaml
index d14d043183..117bbab072 100644
--- a/.github/workflows/black.yaml
+++ b/.github/workflows/black.yaml
@@ -1,11 +1,9 @@
 name: Lint Python
 
 on: [push, pull_request]
-
 jobs:
   lint:
-    runs-on: ubuntu-latest
+    runs-on: ${{ vars.USE_SELF_HOSTED == 'true' && 'self-hosted' || 'ubuntu-latest' }}
     steps:
       - uses: actions/checkout@v3
       - uses: psf/black@stable
-
diff --git a/.github/workflows/github-actions-cron-sync-fork-from-upstream.yml b/.github/workflows/github-actions-cron-sync-fork-from-upstream.yml
index 6d5f57424c..e91e0633cc 100644
--- a/.github/workflows/github-actions-cron-sync-fork-from-upstream.yml
+++ b/.github/workflows/github-actions-cron-sync-fork-from-upstream.yml
@@ -14,7 +14,7 @@ on:
 jobs:
   Sync-Branch-From-Upstream:
     name: Automatic sync 'master' from The-OpenROAD-Project/OpenROAD-flow-scripts
-    runs-on: ubuntu-latest
+    runs-on: ${{ vars.USE_SELF_HOSTED == 'true' && 'self-hosted' || 'ubuntu-latest' }}
 
     # Only allow one action to run at a time.
     concurrency: sync-branch-from-upstream
diff --git a/.github/workflows/github-actions-cron-test-installer.yml b/.github/workflows/github-actions-cron-test-installer.yml
index b2564f5db2..2a53fde91a 100644
--- a/.github/workflows/github-actions-cron-test-installer.yml
+++ b/.github/workflows/github-actions-cron-test-installer.yml
@@ -27,7 +27,7 @@ jobs:
       fail-fast: false
       matrix:
         os: ["ubuntu20.04", "ubuntu22.04"]
-    runs-on: ubuntu-latest
+    runs-on: ${{ vars.USE_SELF_HOSTED == 'true' && 'self-hosted' || 'ubuntu-latest' }}
     steps:
       - name: Check out repository code
         uses: actions/checkout@v3
diff --git a/.github/workflows/github-actions-cron-update-OR.yml b/.github/workflows/github-actions-cron-update-OR.yml
index 6511c5563c..695bd621f0 100644
--- a/.github/workflows/github-actions-cron-update-OR.yml
+++ b/.github/workflows/github-actions-cron-update-OR.yml
@@ -7,7 +7,7 @@ on:
 
 jobs:
   update:
-    runs-on: ubuntu-latest
+    runs-on: ${{ vars.USE_SELF_HOSTED == 'true' && 'self-hosted' || 'ubuntu-latest' }}
     steps:
       - name: Check out repository code recursively
         uses: actions/checkout@v3
diff --git a/.github/workflows/github-actions-cron-update-yosys.yml b/.github/workflows/github-actions-cron-update-yosys.yml
index b88a39c721..f19a27ebe5 100644
--- a/.github/workflows/github-actions-cron-update-yosys.yml
+++ b/.github/workflows/github-actions-cron-update-yosys.yml
@@ -8,7 +8,7 @@ on:
 
 jobs:
   update:
-    runs-on: ubuntu-latest
+    runs-on: ${{ vars.USE_SELF_HOSTED == 'true' && 'self-hosted' || 'ubuntu-latest' }}
     steps:
       - name: Check out repository code recursively
         uses: actions/checkout@v3
diff --git a/.github/workflows/github-actions-cron-util-test.yml b/.github/workflows/github-actions-cron-util-test.yml
index b57089329b..dcfda4c78b 100644
--- a/.github/workflows/github-actions-cron-util-test.yml
+++ b/.github/workflows/github-actions-cron-util-test.yml
@@ -13,11 +13,11 @@ on:
   # Allows you to run this workflow manually from the Actions tab
   workflow_dispatch:
 
-jobs:     
+jobs:
   testUtilScripts:
     strategy:
       fail-fast: false
-    runs-on: ubuntu-latest
+    runs-on: ${{ vars.USE_SELF_HOSTED == 'true' && 'self-hosted' || 'ubuntu-latest' }}
     steps:
       - name: Check out repository code
         uses: actions/checkout@v3
@@ -33,4 +33,4 @@ jobs:
           cd flow/test
           for file in *.py; do
               python "$file"
-          done
\ No newline at end of file
+          done
diff --git a/.github/workflows/github-actions-manual-update-rules.yml b/.github/workflows/github-actions-manual-update-rules.yml
index fc10dae30d..2bc2e02d22 100644
--- a/.github/workflows/github-actions-manual-update-rules.yml
+++ b/.github/workflows/github-actions-manual-update-rules.yml
@@ -9,7 +9,7 @@ on:
 
 jobs:
   update:
-    runs-on: ubuntu-latest
+    runs-on: ${{ vars.USE_SELF_HOSTED == 'true' && 'self-hosted' || 'ubuntu-latest' }}
     strategy:
       fail-fast: false
     steps:
@@ -30,7 +30,7 @@ jobs:
         run: |
           if [[ "${{ github.event.inputs.type }}" == "overwrite" ]]; then
             python flow/util/updateRules.py --keyFile "${CREDS_FILE}" --apiURL ${API_BASE_URL} --commitSHA $(git rev-parse HEAD) --overwrite
-          else 
+          else
             python flow/util/updateRules.py --keyFile "${CREDS_FILE}" --apiURL ${API_BASE_URL} --commitSHA $(git rev-parse HEAD)
           fi
       - name: Push updated rules
diff --git a/.github/workflows/github-actions-on-delete-cleanup.yml b/.github/workflows/github-actions-on-delete-cleanup.yml
index 7596854aad..5dc97769ad 100644
--- a/.github/workflows/github-actions-on-delete-cleanup.yml
+++ b/.github/workflows/github-actions-on-delete-cleanup.yml
@@ -12,7 +12,7 @@ jobs:
   Delete-From-Staging:
     name: Delete branch from staging
 
-    runs-on: ubuntu-latest
+    runs-on: ${{ vars.USE_SELF_HOSTED == 'true' && 'self-hosted' || 'ubuntu-latest' }}
 
     permissions:
       # Read-only access so we don't accidentally try to push to *this* repository.
diff --git a/.github/workflows/github-actions-on-label-create.yml b/.github/workflows/github-actions-on-label-create.yml
index 0befd29908..4e083dac8a 100644
--- a/.github/workflows/github-actions-on-label-create.yml
+++ b/.github/workflows/github-actions-on-label-create.yml
@@ -12,7 +12,7 @@ env:
 jobs:
   Push-To-Staging:
     name: Push to staging
-    runs-on: ubuntu-latest
+    runs-on: ${{ vars.USE_SELF_HOSTED == 'true' && 'self-hosted' || 'ubuntu-latest' }}
 
     permissions:
       # Read-only access so we don't accidentally try to push to *this* repository.
diff --git a/.github/workflows/github-actions-on-push.yml b/.github/workflows/github-actions-on-push.yml
index d95abd04bc..579beea403 100644
--- a/.github/workflows/github-actions-on-push.yml
+++ b/.github/workflows/github-actions-on-push.yml
@@ -8,12 +8,9 @@ on:
 
 jobs:
   scan:
-    runs-on: ubuntu-latest
+    runs-on: ${{ vars.USE_SELF_HOSTED == 'true' && 'self-hosted' || 'ubuntu-latest' }}
     steps:
       - name: Check out repository code
         uses: actions/checkout@v2
       - name: run security_scan_on_push
         uses: The-OpenROAD-Project/actions/security_scan_on_push@main
-
-
-        
diff --git a/.github/workflows/github-actions-publish-docker-images.yml b/.github/workflows/github-actions-publish-docker-images.yml
index bf32946e50..476ec3220d 100644
--- a/.github/workflows/github-actions-publish-docker-images.yml
+++ b/.github/workflows/github-actions-publish-docker-images.yml
@@ -27,7 +27,7 @@ on:
 
 jobs:
   buildCodespaceImage:
-    runs-on: ubuntu-latest
+    runs-on: ${{ vars.USE_SELF_HOSTED == 'true' && 'self-hosted' || 'ubuntu-latest' }}
     timeout-minutes: 600
     steps:
       - uses: actions/checkout@v4
@@ -61,7 +61,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [["ubuntu20.04", "ubuntu:20.04"], ["ubuntu22.04", "ubuntu:22.04"]]
-    runs-on: ubuntu-latest
+    runs-on: ${{ vars.USE_SELF_HOSTED == 'true' && 'self-hosted' || 'ubuntu-latest' }}
     steps:
       - name: Check out repository code
         uses: actions/checkout@v4
diff --git a/.github/workflows/github-actions-update-rules.yml b/.github/workflows/github-actions-update-rules.yml
index c728f90df9..83e4b4208b 100644
--- a/.github/workflows/github-actions-update-rules.yml
+++ b/.github/workflows/github-actions-update-rules.yml
@@ -6,7 +6,7 @@ on:
 
 jobs:
   update:
-    runs-on: ubuntu-latest
+    runs-on: ${{ vars.USE_SELF_HOSTED == 'true' && 'self-hosted' || 'ubuntu-latest' }}
     strategy:
       fail-fast: false
     steps:
diff --git a/.github/workflows/github-actions-yaml-test.yml b/.github/workflows/github-actions-yaml-test.yml
index e9ced92258..51cec64329 100644
--- a/.github/workflows/github-actions-yaml-test.yml
+++ b/.github/workflows/github-actions-yaml-test.yml
@@ -7,7 +7,7 @@ jobs:
   docs-test-job:
     name: 'Tests for variables.yaml'
     if: github.event_name == 'pull_request' || github.event_name == 'push'
-    runs-on: ubuntu-latest
+    runs-on: ${{ vars.USE_SELF_HOSTED == 'true' && 'self-hosted' || 'ubuntu-latest' }}
     steps:
     - name: Checkout repository
       uses: actions/checkout@v4