diff --git a/eng/pipelines/coreclr/templates/helix-queues-setup.yml b/eng/pipelines/coreclr/templates/helix-queues-setup.yml
index 43b78cee145dc9..d0ee3c2a85b6d7 100644
--- a/eng/pipelines/coreclr/templates/helix-queues-setup.yml
+++ b/eng/pipelines/coreclr/templates/helix-queues-setup.yml
@@ -87,11 +87,13 @@ jobs:
     - ${{ if eq(parameters.platform, 'Linux_x64') }}:
       - ${{ if and(eq(variables['System.TeamProject'], 'public'), in(parameters.jobParameters.helixQueueGroup, 'pr', 'ci', 'libraries')) }}:
         - Ubuntu.1804.Amd64.Open
+        - (Centos.Stream9.Amd64.Open)Ubuntu.1804.Amd64.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:centos-stream9-helix-20220421130143-dee2d19
       - ${{ if and(eq(variables['System.TeamProject'], 'public'), notIn(parameters.jobParameters.helixQueueGroup, 'pr', 'ci', 'libraries')) }}:
         - (Debian.10.Amd64.Open)Ubuntu.1804.Amd64.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:debian-10-helix-amd64-20210304164434-56c6673
         - (Debian.11.Amd64.Open)Ubuntu.1804.Amd64.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:debian-11-helix-amd64-20210304164428-5a7c380
         - Ubuntu.1804.Amd64.Open
         - (Centos.8.Amd64.Open)Ubuntu.1804.Amd64.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:centos-8-helix-20201229003624-c1bf759
+        - (Centos.Stream9.Amd64.Open)Ubuntu.1804.Amd64.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:centos-stream9-helix-20220421130143-dee2d19
         - RedHat.7.Amd64.Open
       - ${{ if eq(variables['System.TeamProject'], 'internal') }}:
         - (Debian.10.Amd64)Ubuntu.1804.amd64@mcr.microsoft.com/dotnet-buildtools/prereqs:debian-10-helix-amd64-20210304164434-56c6673
@@ -99,6 +101,7 @@ jobs:
         - Ubuntu.1804.Amd64
         - (Centos.8.Amd64)Ubuntu.1604.amd64@mcr.microsoft.com/dotnet-buildtools/prereqs:centos-8-helix-20201229003624-c1bf759
         - (Fedora.34.Amd64)Ubuntu.1604.amd64@mcr.microsoft.com/dotnet-buildtools/prereqs:fedora-34-helix-20220331150839-4f64125
+        - (Centos.Stream9.Amd64)Ubuntu.1804.Amd64@mcr.microsoft.com/dotnet-buildtools/prereqs:centos-stream9-helix-20220421130143-dee2d19
         - RedHat.7.Amd64
 
     # OSX arm64
diff --git a/eng/pipelines/libraries/helix-queues-setup.yml b/eng/pipelines/libraries/helix-queues-setup.yml
index ecca458ba59323..89fcb205033a12 100644
--- a/eng/pipelines/libraries/helix-queues-setup.yml
+++ b/eng/pipelines/libraries/helix-queues-setup.yml
@@ -60,6 +60,7 @@ jobs:
       - ${{ if and(eq(parameters.jobParameters.interpreter, ''), ne(parameters.jobParameters.isSingleFile, true)) }}:
         - ${{ if and(eq(parameters.jobParameters.testScope, 'outerloop'), eq(parameters.jobParameters.runtimeFlavor, 'mono')) }}:
           - (Centos.8.Amd64.Open)Ubuntu.1804.Amd64.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:centos-8-helix-20201229003624-c1bf759
+          - (Centos.Stream9.Amd64.Open)Ubuntu.1804.Amd64.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:centos-stream9-helix-20220421130143-dee2d19
           - RedHat.7.Amd64.Open
           - SLES.15.Amd64.Open
           - (Fedora.34.Amd64.Open)Ubuntu.1804.Amd64.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:fedora-34-helix-20220331150839-4f64125
@@ -68,6 +69,7 @@ jobs:
         - ${{ if or(ne(parameters.jobParameters.testScope, 'outerloop'), ne(parameters.jobParameters.runtimeFlavor, 'mono')) }}:
           - ${{ if or(eq(parameters.jobParameters.isExtraPlatforms, true), eq(parameters.jobParameters.includeAllPlatforms, true)) }}:
             - (Centos.8.Amd64.Open)Ubuntu.1604.Amd64.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:centos-8-helix-20201229003624-c1bf759
+            - (Centos.Stream9.Amd64.Open)Ubuntu.1804.Amd64.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:centos-stream9-helix-20220421130143-dee2d19
             - SLES.15.Amd64.Open
             - (Fedora.34.Amd64.Open)ubuntu.1604.amd64.open@mcr.microsoft.com/dotnet-buildtools/prereqs:fedora-34-helix-20220331150839-4f64125
             - (Ubuntu.2110.Amd64.Open)ubuntu.1604.amd64.open@mcr.microsoft.com/dotnet-buildtools/prereqs:ubuntu-21.04-helix-amd64-20210922170909-34a2d72
@@ -76,6 +78,7 @@ jobs:
             - (openSUSE.15.2.Amd64.Open)ubuntu.1604.amd64.open@mcr.microsoft.com/dotnet-buildtools/prereqs:opensuse-15.2-helix-amd64-20211018152525-9cc02fe
           - ${{ if or(ne(parameters.jobParameters.isExtraPlatforms, true), eq(parameters.jobParameters.includeAllPlatforms, true)) }}:
             - (Centos.7.Amd64.Open)Ubuntu.1604.Amd64.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:centos-7-mlnet-helix-20210714125435-dde38af
+            - (Centos.Stream9.Amd64.Open)Ubuntu.1804.Amd64.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:centos-stream9-helix-20220421130143-dee2d19
             - RedHat.7.Amd64.Open
             - (Debian.10.Amd64.Open)Ubuntu.1804.Amd64.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:debian-10-helix-amd64-20210304164434-56c6673
             - Ubuntu.1804.Amd64.Open