diff --git a/CHANGELOG.md b/CHANGELOG.md
index 403a1bf8f..27082a57b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,7 @@
 
 ### Bug fixes
 * Fixed the default naming of multiple electrical series in the `SpikeGLXConverterPipe`. [PR #957](https://github.com/catalystneuro/neuroconv/pull/957)
+* Fixed an issue when passing conversion options to a sub-converter (like the popular `SpikeGLXConverterPipe`) nested inside another `NWBConverter`. [PR #979](https://github.com/catalystneuro/neuroconv/pull/979)
 
 ### Improvements
 * The `OpenEphysBinaryRecordingInterface` now uses `lxml` for extracting the session start time from the settings.xml file and does not depend on `pyopenephys` anymore. [PR #971](https://github.com/catalystneuro/neuroconv/pull/971)
diff --git a/src/neuroconv/nwbconverter.py b/src/neuroconv/nwbconverter.py
index b654c1a68..47c99f74d 100644
--- a/src/neuroconv/nwbconverter.py
+++ b/src/neuroconv/nwbconverter.py
@@ -3,6 +3,7 @@
 import json
 import warnings
 from collections import Counter
+from inspect import signature
 from pathlib import Path
 from typing import Dict, List, Literal, Optional, Tuple, Union
 
@@ -158,10 +159,24 @@ def create_nwbfile(self, metadata: Optional[dict] = None, conversion_options: Op
 
     def add_to_nwbfile(self, nwbfile: NWBFile, metadata, conversion_options: Optional[dict] = None) -> None:
         conversion_options = conversion_options or dict()
-        for interface_name, data_interface in self.data_interface_objects.items():
-            data_interface.add_to_nwbfile(
-                nwbfile=nwbfile, metadata=metadata, **conversion_options.get(interface_name, dict())
-            )
+        for interface_key, data_interface in self.data_interface_objects.items():
+            if isinstance(data_interface, NWBConverter):
+                subconverter_kwargs = dict(nwbfile=nwbfile, metadata=metadata)
+
+                # Certain subconverters fully expose control over their interfaces conversion options
+                # (such as iterator options, including progress bar details)
+                subconverter_keyword_arguments = list(signature(data_interface.add_to_nwbfile).parameters.keys())
+                if "conversion_options" in subconverter_keyword_arguments:
+                    subconverter_kwargs["conversion_options"] = conversion_options.get(interface_key, None)
+                # Others do not, and instead expose simplified global keywords similar to a classic interface
+                else:
+                    subconverter_kwargs.update(conversion_options.get(interface_key, dict()))
+
+                data_interface.add_to_nwbfile(**subconverter_kwargs)
+            else:
+                data_interface.add_to_nwbfile(
+                    nwbfile=nwbfile, metadata=metadata, **conversion_options.get(interface_key, dict())
+                )
 
     def run_conversion(
         self,
diff --git a/tests/test_on_data/test_format_converters/test_spikeglx_converter.py b/tests/test_on_data/test_format_converters/test_spikeglx_converter.py
index 910e238a0..ddc4121f1 100644
--- a/tests/test_on_data/test_format_converters/test_spikeglx_converter.py
+++ b/tests/test_on_data/test_format_converters/test_spikeglx_converter.py
@@ -96,6 +96,30 @@ class TestConverter(NWBConverter):
         expected_session_start_time = datetime(2020, 11, 3, 10, 35, 10).astimezone()
         self.assertNWBFileStructure(nwbfile_path=nwbfile_path, expected_session_start_time=expected_session_start_time)
 
+    def test_single_probe_spikeglx_converter_in_converter_preview(self):
+        class TestConverter(NWBConverter):
+            data_interface_classes = dict(SpikeGLX=SpikeGLXConverterPipe)
+
+        source_data = dict(SpikeGLX=dict(folder_path=str(SPIKEGLX_PATH / "Noise4Sam_g0")))
+        converter = TestConverter(source_data=source_data)
+
+        conversion_options = dict(
+            SpikeGLX={"imec0.ap": {"stub_test": True}, "imec0.lf": {"stub_test": True}, "nidq": {"stub_test": True}}
+        )
+
+        nwbfile_path = self.tmpdir / "test_single_probe_spikeglx_converter_preview.nwb"
+        converter.run_conversion(nwbfile_path=nwbfile_path, conversion_options=conversion_options)
+
+        expected_session_start_time = datetime(2020, 11, 3, 10, 35, 10).astimezone()
+        self.assertNWBFileStructure(nwbfile_path=nwbfile_path, expected_session_start_time=expected_session_start_time)
+
+        with NWBHDF5IO(path=nwbfile_path) as io:
+            nwbfile = io.read()
+
+            assert nwbfile.acquisition["ElectricalSeriesAPImec0"].data.shape == (100, 384)
+            assert nwbfile.acquisition["ElectricalSeriesLFImec0"].data.shape == (100, 384)
+            assert nwbfile.acquisition["ElectricalSeriesNIDQ"].data.shape == (100, 9)
+
 
 class TestMultiProbeSpikeGLXConverter(TestCase):
     maxDiff = None