diff --git a/reg_tests/chgres_cube/driver.orion.sh b/reg_tests/chgres_cube/driver.orion.sh
index 7211af659..f2fead5bf 100755
--- a/reg_tests/chgres_cube/driver.orion.sh
+++ b/reg_tests/chgres_cube/driver.orion.sh
@@ -30,7 +30,7 @@ module use ../../modulefiles
 module load build.$target.intelllvm
 module list
 
-ulimit -s unlimited
+ulimit -a
 
 export OUTDIR="${WORK_DIR:-/work/noaa/stmp/$LOGNAME}"
 export OUTDIR="${OUTDIR}/reg-tests/chgres-cube"
diff --git a/reg_tests/cpld_gridgen/rt.sh b/reg_tests/cpld_gridgen/rt.sh
index ca499347a..1a97e4029 100755
--- a/reg_tests/cpld_gridgen/rt.sh
+++ b/reg_tests/cpld_gridgen/rt.sh
@@ -70,7 +70,7 @@ elif [[ $target = orion ]]; then
   export NCCMP=nccmp
   BASELINE_ROOT=/work/noaa/nems/role-nems/ufs_utils/reg_tests/cpld_gridgen/baseline_data
   PARTITION=''
-  ulimit -s unlimited
+  ulimit -a
 elif [[ $target = hercules ]]; then
   STMP=${STMP:-/work2/noaa/stmp/$USER}
   ACCOUNT=${ACCOUNT:-fv3-cpu}
diff --git a/reg_tests/global_cycle/driver.orion.sh b/reg_tests/global_cycle/driver.orion.sh
index c04ba7b2a..871e9ae5d 100755
--- a/reg_tests/global_cycle/driver.orion.sh
+++ b/reg_tests/global_cycle/driver.orion.sh
@@ -25,6 +25,8 @@ module use ../../modulefiles
 module load build.$target.intelllvm
 module list
 
+ulimit -a
+
 export WORK_DIR="${WORK_DIR:-/work/noaa/stmp/$LOGNAME}"
 
 PROJECT_CODE="${PROJECT_CODE:-fv3-cpu}"
diff --git a/reg_tests/grid_gen/driver.orion.sh b/reg_tests/grid_gen/driver.orion.sh
index 16ce6010e..7afe4bbc3 100755
--- a/reg_tests/grid_gen/driver.orion.sh
+++ b/reg_tests/grid_gen/driver.orion.sh
@@ -27,7 +27,7 @@ module load build.$target.intelllvm
 module list
 
 set -x
-ulimit -s unlimited
+ulimit -a
 
 export WORK_DIR="${WORK_DIR:-/work/noaa/stmp/$LOGNAME}"
 export WORK_DIR="${WORK_DIR}/reg-tests/grid-gen"
diff --git a/reg_tests/ice_blend/driver.orion.sh b/reg_tests/ice_blend/driver.orion.sh
index afeaf16cd..a21b8893e 100755
--- a/reg_tests/ice_blend/driver.orion.sh
+++ b/reg_tests/ice_blend/driver.orion.sh
@@ -36,7 +36,7 @@ module load grib-util/1.4.0
 module load wgrib2/3.6.0
 module list
 
-ulimit -s unlimited
+ulimit -a
 
 export DATA="${WORK_DIR:-/work/noaa/stmp/$LOGNAME}"
 export DATA="${DATA}/reg-tests/ice-blend"
diff --git a/reg_tests/ocnice_prep/rt.sh b/reg_tests/ocnice_prep/rt.sh
index b2f04d28c..34004df88 100755
--- a/reg_tests/ocnice_prep/rt.sh
+++ b/reg_tests/ocnice_prep/rt.sh
@@ -86,7 +86,7 @@ elif [[ $target = orion ]]; then
     WLCLK=15
     export NCCMP=nccmp
     PARTITION=''
-    ulimit -s unlimited
+    ulimit -a
 elif [[ $target = hercules ]]; then
     STMP=${STMP:-/work2/noaa/stmp/$USER}
     BASELINE_ROOT=/work/noaa/nems/role-nems/ufs_utils.hercules/reg_tests/ocnice_prep/baseline_data
diff --git a/reg_tests/regrid_sfc/driver.sh b/reg_tests/regrid_sfc/driver.sh
index 0505bdf89..93a36fee3 100755
--- a/reg_tests/regrid_sfc/driver.sh
+++ b/reg_tests/regrid_sfc/driver.sh
@@ -67,6 +67,7 @@ elif [[ "$target" == "orion" ]];then
   export HOMEreg=/work/noaa/nems/role-nems/ufs_utils/reg_tests/regrid_sfc
   export APRUN_REGRID=srun
   PARTITION=''
+  ulimit -a
 elif [[ "$target" == "hercules" ]];then
   WORK_DIR="${WORK_DIR:-/work2/noaa/stmp/$LOGNAME}"
   PROJECT_CODE="${PROJECT_CODE:-fv3-cpu}"
diff --git a/reg_tests/rt.sh b/reg_tests/rt.sh
index 0d008a60d..b77340ab9 100755
--- a/reg_tests/rt.sh
+++ b/reg_tests/rt.sh
@@ -13,7 +13,11 @@ wait_for_fin() {
   done
 }
 
-ulimit -s unlimited
+if [[ "$(hostname)" =~ "Orion" || "$(hostname)" =~ "orion" ]]; then
+  ulimit -a
+else
+  ulimit -s unlimited
+fi
 
 export MAILTO=
 
diff --git a/reg_tests/snow2mdl/driver.orion.sh b/reg_tests/snow2mdl/driver.orion.sh
index df6415c22..df0b87d5f 100755
--- a/reg_tests/snow2mdl/driver.orion.sh
+++ b/reg_tests/snow2mdl/driver.orion.sh
@@ -28,7 +28,7 @@ module load wgrib2/3.6.0
 module load prod_util/2.1.1
 module list
 
-ulimit -s unlimited
+ulimit -a
 
 export DATA_ROOT="${WORK_DIR:-/work/noaa/stmp/$LOGNAME}"
 export DATA_ROOT="${DATA_ROOT}/reg-tests/snow2mdl"
diff --git a/reg_tests/weight_gen/driver.orion.sh b/reg_tests/weight_gen/driver.orion.sh
index a660e2e64..1da293508 100755
--- a/reg_tests/weight_gen/driver.orion.sh
+++ b/reg_tests/weight_gen/driver.orion.sh
@@ -36,6 +36,8 @@ module use ../../modulefiles
 module load build.$target.$compiler
 module list
 
+ulimit -a
+
 export DATA="${WORK_DIR:-/work/noaa/stmp/$LOGNAME}"
 export DATA="${DATA}/reg-tests/weight_gen"