diff --git a/compiler/characterizer/__init__.py b/compiler/characterizer/__init__.py
index 3f3b8b60..00ad3b3e 100644
--- a/compiler/characterizer/__init__.py
+++ b/compiler/characterizer/__init__.py
@@ -33,6 +33,12 @@ if not OPTS.analytical_delay:
     else:
         (OPTS.spice_name, OPTS.spice_exe) = get_tool("spice", ["Xyce", "ngspice", "ngspice.exe", "hspice", "xa"])
 
+    if OPTS.spice_name == "Xyce":
+        (OPTS.mpi_name, OPTS.mpi_exe) = get_tool("mpi", ["mpirun"])
+    else:
+        OPTS.mpi_name = None
+        OPTS.mpi_exe = ""
+
     # set the input dir for spice files if using ngspice
     if OPTS.spice_name == "ngspice":
         os.environ["NGSPICE_INPUT_DIR"] = "{0}".format(OPTS.openram_temp)
diff --git a/compiler/characterizer/stimuli.py b/compiler/characterizer/stimuli.py
index e0a37e74..f49f636b 100644
--- a/compiler/characterizer/stimuli.py
+++ b/compiler/characterizer/stimuli.py
@@ -358,6 +358,19 @@ class stimuli():
                                                            temp_stim,
                                                            OPTS.openram_temp)
             valid_retcode=0
+        elif OPTS.spice_name == "Xyce":
+            if OPTS.num_sim_threads > 1 and OPTS.mpi_name:
+                mpi_cmd = "{0} -np {1}".format(OPTS.mpi_exe,
+                                               OPTS.num_sim_threads)
+            else:
+                mpi_cmd = ""
+
+            cmd = "{0} {1} -o {3}timing.lis {2}".format(mpi_cmd,
+                                                        OPTS.spice_exe,
+                                                        temp_stim,
+                                                        OPTS.openram_temp)
+
+            valid_retcode=0
         else:
             # ngspice 27+ supports threading with "set num_threads=4" in the stimulus file or a .spiceinit
             # Measurements can't be made with a raw file set in ngspice