diff --git a/buildbot/osuosl/master/config/builders.py b/buildbot/osuosl/master/config/builders.py
--- a/buildbot/osuosl/master/config/builders.py
+++ b/buildbot/osuosl/master/config/builders.py
@@ -1692,6 +1692,8 @@
     'tags'  : ["sanitizer"],
     'workernames' : [
         "sanitizer-buildbot7",
+        "sanitizer-buildbot9",
+        "sanitizer-buildbot11",
     ],
     'builddir': "sanitizer-aarch64-linux-bootstrap-asan",
     'factory' : SanitizerBuilder.getSanitizerBuildFactory(
@@ -1703,6 +1705,8 @@
     'workernames' : [
         "sanitizer-buildbot7",
         "sanitizer-buildbot8",
+        "sanitizer-buildbot9",
+        "sanitizer-buildbot11",
     ],
     'builddir': "sanitizer-aarch64-linux-bootstrap-hwasan",
     'factory' : SanitizerBuilder.getSanitizerBuildFactory(
@@ -1713,6 +1717,8 @@
     'tags'  : ["sanitizer"],
     'workernames' : [
         "sanitizer-buildbot8",
+        "sanitizer-buildbot10",
+        "sanitizer-buildbot12",
     ],
     'builddir': "sanitizer-aarch64-linux-bootstrap-msan",
     'factory' : SanitizerBuilder.getSanitizerBuildFactory(
@@ -1723,6 +1729,8 @@
     'tags'  : ["sanitizer"],
     'workernames' : [
         "sanitizer-buildbot8",
+        "sanitizer-buildbot10",
+        "sanitizer-buildbot12",
     ],
     'builddir': "sanitizer-aarch64-linux-bootstrap-ubsan",
     'factory' : SanitizerBuilder.getSanitizerBuildFactory(
@@ -1733,6 +1741,8 @@
     'tags'  : ["sanitizer"],
     'workernames' : [
         "sanitizer-buildbot7",
+        "sanitizer-buildbot9",
+        "sanitizer-buildbot11",
     ],
     'builddir': "sanitizer-aarch64-linux-fuzzer",
     'factory' : SanitizerBuilder.getSanitizerBuildFactory()},
diff --git a/buildbot/osuosl/master/config/workers.py b/buildbot/osuosl/master/config/workers.py
--- a/buildbot/osuosl/master/config/workers.py
+++ b/buildbot/osuosl/master/config/workers.py
@@ -128,6 +128,10 @@
         # aarch64 GCE instances
         create_worker("sanitizer-buildbot7", properties={'jobs': 48}, max_builds=3),
         create_worker("sanitizer-buildbot8", properties={'jobs': 48}, max_builds=3),
+        create_worker("sanitizer-buildbot9", properties={'jobs': 48}, max_builds=3),
+        create_worker("sanitizer-buildbot10", properties={'jobs': 48}, max_builds=3),
+        create_worker("sanitizer-buildbot11", properties={'jobs': 48}, max_builds=3),
+        create_worker("sanitizer-buildbot12", properties={'jobs': 48}, max_builds=3),
 
         # POWER 8 PowerPC AIX 7.2
         create_worker("aix-ppc64", properties={'jobs': 10}, max_builds=1),