diff --git a/polaris/remap/mapping_file_step.py b/polaris/remap/mapping_file_step.py
index 817d6cabdf..97cda00aed 100644
--- a/polaris/remap/mapping_file_step.py
+++ b/polaris/remap/mapping_file_step.py
@@ -2,6 +2,7 @@
 
 import pyproj
 import xarray as xr
+from mpas_tools.logging import check_call
 from pyremap import (
     LatLon2DGridDescriptor,
     LatLonGridDescriptor,
@@ -448,15 +449,52 @@ def runtime_setup(self):
                 self.dst_mesh_filename,
             )
         elif map_tool == 'moab':
+            src_mesh_filename = self._moab_partition_scrip_file(
+                self.src_mesh_filename
+            )
+            dst_mesh_filename = self._moab_partition_scrip_file(
+                self.dst_mesh_filename
+            )
             self.args = _moab_build_map_args(
-                remapper,
-                self.method,
-                src_descriptor,
-                self.src_mesh_filename,
-                dst_descriptor,
-                self.dst_mesh_filename,
+                remapper, self.method, src_mesh_filename, dst_mesh_filename
             )
 
+    def _moab_partition_scrip_file(self, in_filename):
+        """
+        Partition SCRIP file for parallel mbtempest use
+        """
+        logger = self.logger
+        ntasks = self.ntasks
+
+        logger.info(f'Partition SCRIP file {in_filename}')
+
+        h5m_filename = in_filename.replace('.nc', '.h5m')
+        h5m_part_filename = in_filename.replace('.nc', f'.p{ntasks}.h5m')
+
+        # Convert source SCRIP to mbtempest
+        args = [
+            'mbconvert',
+            '-B',
+            in_filename,
+            h5m_filename,
+        ]
+        check_call(args, logger)
+
+        # Partition source SCRIP
+        args = [
+            'mbpart',
+            f'{ntasks}',
+            '-z',
+            'RCB',
+            h5m_filename,
+            h5m_part_filename,
+        ]
+        check_call(args, logger)
+
+        logger.info('  Done.')
+
+        return h5m_part_filename
+
 
 def _check_remapper(remapper, method, map_tool):
     """
@@ -519,12 +557,7 @@ def _esmf_build_map_args(
 
 
 def _moab_build_map_args(
-    remapper,
-    method,
-    src_descriptor,
-    src_mesh_filename,
-    dst_descriptor,
-    dst_mesh_filename,
+    remapper, method, src_mesh_filename, dst_mesh_filename
 ):
     """
     Get command-line arguments for making a mapping file with mbtempest
@@ -532,26 +565,8 @@ def _moab_build_map_args(
     fvmethod = {'conserve': 'none', 'bilinear': 'bilin'}
 
     map_filename = remapper.mappingFileName
-    intx_filename = (
-        f'moab_intx_{src_descriptor.meshName}_to_{dst_descriptor.meshName}.h5m'
-    )
-
-    intx_args = [
-        'mbtempest',
-        '--type',
-        '5',
-        '--load',
-        src_mesh_filename,
-        '--load',
-        dst_mesh_filename,
-        '--intx',
-        intx_filename,
-    ]
 
-    if src_descriptor.regional or dst_descriptor.regional:
-        intx_args.append('--rrmgrids')
-
-    map_args = [
+    args = [
         'mbtempest',
         '--type',
         '5',
@@ -559,15 +574,16 @@ def _moab_build_map_args(
         src_mesh_filename,
         '--load',
         dst_mesh_filename,
-        '--intx',
-        intx_filename,
+        '--file',
+        map_filename,
         '--weights',
+        '--gnomonic',
+        '--boxeps',
+        '1e-9',
         '--method',
         'fv',
         '--method',
         'fv',
-        '--file',
-        map_filename,
         '--order',
         '1',
         '--order',
@@ -576,12 +592,7 @@ def _moab_build_map_args(
         fvmethod[method],
     ]
 
-    if method == 'conserve' and (
-        src_descriptor.regional or dst_descriptor.regional
-    ):
-        map_args.append('--rrmgrids')
-
-    return [intx_args, map_args]
+    return [args]
 
 
 def _get_descriptor(info):