diff --git a/tools/devcluster-slurm.yaml b/tools/devcluster-slurm.yaml
index 2c92cabaf16..f46cdb72c6b 100644
--- a/tools/devcluster-slurm.yaml
+++ b/tools/devcluster-slurm.yaml
@@ -75,7 +75,7 @@ $OPT_RESOURCEPOOLS
           security:
              tls:
                 skip_verify: true
-          type: slurm
+          type: $OPT_WLMTYPE
           # job_project_source: project
           # File containing the authorization token for communication with the launcher -- if blank then none.
           # This would typically be a full path where the determined master is running generated by
diff --git a/tools/slurmcluster.sh b/tools/slurmcluster.sh
index c458b574915..741e08b579e 100755
--- a/tools/slurmcluster.sh
+++ b/tools/slurmcluster.sh
@@ -293,6 +293,7 @@ OPT_CHECKPOINTPATH_casablanca_login2=/mnt/lustre/foundation_engineering/determin
 OPT_MASTERHOST_casablanca_login2=casablanca-login2
 OPT_MASTERPORT_casablanca_login2=$USERPORT
 OPT_TRESSUPPORTED_casablanca_login2=false
+OPT_WLMTYPE_casablanca_login2=pbs
 
 # Configuration for sawmill (10.100.97.101)
 OPT_name_sawmill=10.100.97.101
@@ -502,6 +503,12 @@ export OPT_DEFAULTCOMPUTERESOURCEPOOL=$(lookup "OPT_DEFAULTCOMPUTERESOURCEPOOL_$
 export OPT_TASKCONTAINERDEFAULTS=$(lookup "OPT_TASKCONTAINERDEFAULTS_$CLUSTER")
 export OPT_PARTITIONOVERRIDES=$(lookup "OPT_PARTITIONOVERRIDES_$CLUSTER")
 export OPT_RESOURCEPOOLS=$(lookup "OPT_RESOURCEPOOLS_$CLUSTER")
+export OPT_WLMTYPE=$(lookup "OPT_WLMTYPE_$CLUSTER")
+
+# If WLM type has not been specified, default to  Slurm
+if [[ -z $OPT_WLMTYPE ]]; then
+    export OPT_WLMTYPE="slurm"
+fi
 
 if [[ -z $OPT_GRESSUPPORTED ]]; then
     export OPT_GRESSUPPORTED="true"