diff --git a/gridappsd-field-bus-lib/gridappsd_field_bus/field_interface/field_proxy_forwarder.py b/gridappsd-field-bus-lib/gridappsd_field_bus/field_interface/field_proxy_forwarder.py
index b575efc..8722ac4 100644
--- a/gridappsd-field-bus-lib/gridappsd_field_bus/field_interface/field_proxy_forwarder.py
+++ b/gridappsd-field-bus-lib/gridappsd_field_bus/field_interface/field_proxy_forwarder.py
@@ -14,8 +14,8 @@
 from cimgraph.databases import BlazegraphConnection
 from cimgraph.models import BusBranchModel
 
+import importlib
 import os
-import cimgraph.data_profile.cimhub_ufls as cim
 
 REQUEST_FIELD = ".".join((topics.PROCESS_PREFIX, "request.field"))
 
@@ -64,7 +64,16 @@ class FieldProxyForwarder:
     when direct connection is not possible.
     """
 
-    def __init__(self, connection_url: str, username: str, password: str, mrid: str):
+    def __init__(
+        self,
+        connection_url: str,
+        username: str,
+        password: str,
+        mrid: str,
+        cim_profile: str = os.environ.get("CIMG_CIM_PROFILE", "cimhub_2023"),
+    ):
+        self.cim = importlib.import_module("cimgraph.data_profile." + cim_profile)
+
         # Connect to OT
         self.ot_connection = GridAPPSD()
 
@@ -89,7 +98,7 @@ def __init__(self, connection_url: str, username: str, password: str, mrid: str)
         # Subscribe to messages on OT bus
         self.ot_connection.subscribe(topics.field_input_topic(), self.on_message_from_ot)
 
-        os.environ["CIMG_CIM_PROFILE"] = "cimhub_ufls"
+        os.environ["CIMG_CIM_PROFILE"] = cim_profile
         os.environ["CIMG_URL"] = "http://localhost:8889/bigdata/namespace/kb/sparql"
         os.environ["CIMG_DATABASE"] = "powergridmodel"
         os.environ["CIMG_NAMESPACE"] = "http://iec.ch/TC57/CIM100#"
@@ -97,12 +106,12 @@ def __init__(self, connection_url: str, username: str, password: str, mrid: str)
         os.environ["CIMG_USE_UNITS"] = "False"
 
         self.database = BlazegraphConnection()
-        distribution_area = cim.DistributionArea(mRID=mrid)
+        distribution_area = self.cim.DistributionArea(mRID=mrid)
         self.network = BusBranchModel(connection=self.database, container=distribution_area, distributed=False)
-        self.network.get_all_edges(cim.DistributionArea)
-        self.network.get_all_edges(cim.Substation)
+        self.network.get_all_edges(self.cim.DistributionArea)
+        self.network.get_all_edges(self.cim.Substation)
 
-        for substation in self.network.graph.get(cim.Substation, {}).values():
+        for substation in self.network.graph.get(self.cim.Substation, {}).values():
             mrid = substation.mRID  # type: ignore[attr-defined]
             print(f"Subscribing to Substation: /topic/goss.gridappsd.field.{mrid}")
             self.ot_connection.subscribe("/topic/goss.gridappsd.field." + mrid, self.on_message_from_ot)
diff --git a/gridappsd-field-bus-lib/gridappsd_field_bus/forwarder.py b/gridappsd-field-bus-lib/gridappsd_field_bus/forwarder.py
index 66ed250..a650093 100644
--- a/gridappsd-field-bus-lib/gridappsd_field_bus/forwarder.py
+++ b/gridappsd-field-bus-lib/gridappsd_field_bus/forwarder.py
@@ -33,13 +33,21 @@
     show_default="from environment variable GRIDAPPSD_ADDRESS",
     help="Connection URL.",
 )
-def start_forwarder(username, password, connection_url):
+@click.option(
+    "--mrid",
+    default=lambda: os.getenv("GRIDAPPSD_FIELD_BUS_MRID"),
+    type=str,
+    metavar="MRID",
+    show_default="from environment variable GRIDAPPSD_FIELD_BUS_MRID",
+    help="mRID of the distribution area/substation to bridge for field bus forwarding.",
+)
+def start_forwarder(username, password, connection_url, mrid):
     """Start the field proxy forwarder with either a YAML configuration or cmd-line arguments."""
 
-    required = [username, password, connection_url]
+    required = [username, password, connection_url, mrid]
     if not all(required):
         click.echo(
-            "Username, password, and connection URL must be provided either through environment variables or command-line arguments."
+            "Username, password, connection URL, and mrid must be provided either through environment variables or command-line arguments."
         )
         click.Abort()
 
@@ -49,9 +57,14 @@ def start_forwarder(username, password, connection_url):
         click.Abort()
 
     # Use command-line arguments
-    click.echo(f"Using command line arguments: {username}, {password}, {connection_url}")
+    click.echo(f"Using command line arguments: {username}, {password}, {connection_url}, {mrid}")
 
-    FieldProxyForwarder(username, password, connection_url, None)
+    FieldProxyForwarder(
+        connection_url=connection_url,
+        username=username,
+        password=password,
+        mrid=mrid,
+    )
 
     time.sleep(0.1)
 
diff --git a/gridappsd-field-bus-lib/tests/test_field_proxy_forwarder_cim_profile.py b/gridappsd-field-bus-lib/tests/test_field_proxy_forwarder_cim_profile.py
new file mode 100644
index 0000000..c3c1533
--- /dev/null
+++ b/gridappsd-field-bus-lib/tests/test_field_proxy_forwarder_cim_profile.py
@@ -0,0 +1,20 @@
+import importlib
+
+import pytest
+
+
+@pytest.mark.parametrize("cim_profile", ["cimhub_2023"])
+def test_field_proxy_forwarder_imports_cleanly_and_profile_has_required_types(cim_profile):
+    """FieldProxyForwarder must import without raising ModuleNotFoundError, and
+    the configured CIM profile module must expose DistributionArea and
+    Substation, since FieldProxyForwarder.__init__ resolves both from it.
+    """
+    # Import the module under test. This must not raise ModuleNotFoundError,
+    # which was the failure mode when the module imported the now-removed
+    # cimhub_ufls profile unconditionally at module scope.
+    from gridappsd_field_bus.field_interface import field_proxy_forwarder  # noqa: F401
+
+    profile_module = importlib.import_module("cimgraph.data_profile." + cim_profile)
+
+    assert hasattr(profile_module, "DistributionArea")
+    assert hasattr(profile_module, "Substation")