diff --git a/doc/news/interface_changes/DM-44757.electrometer.rst b/doc/news/interface_changes/DM-44757.electrometer.rst
new file mode 100644
index 000000000..a79b8d967
--- /dev/null
+++ b/doc/news/interface_changes/DM-44757.electrometer.rst
@@ -0,0 +1 @@
+Add optional groupID to startScan and startScanDt.
\ No newline at end of file
diff --git a/doc/news/interface_changes/DM-44757.fiberspectrograph.rst b/doc/news/interface_changes/DM-44757.fiberspectrograph.rst
new file mode 100644
index 000000000..de12e5da6
--- /dev/null
+++ b/doc/news/interface_changes/DM-44757.fiberspectrograph.rst
@@ -0,0 +1 @@
+Add optional groupID to the expose command.
\ No newline at end of file
diff --git a/python/lsst/ts/xml/data/sal_interfaces/Electrometer/Electrometer_Commands.xml b/python/lsst/ts/xml/data/sal_interfaces/Electrometer/Electrometer_Commands.xml
index 0bbba87e6..5cbcfa435 100644
--- a/python/lsst/ts/xml/data/sal_interfaces/Electrometer/Electrometer_Commands.xml
+++ b/python/lsst/ts/xml/data/sal_interfaces/Electrometer/Electrometer_Commands.xml
@@ -87,6 +87,13 @@
       <Units>unitless</Units>
       <Count>1</Count>
     </item>
+    <item>
+      <EFDB_Name>groupId</EFDB_Name>
+      <Description>Optional group ID for the electrometer reading.</Description>
+      <IDL_Type>string</IDL_Type>
+      <Units>unitless</Units>
+      <Count>1</Count>
+    </item>
   </SALCommand>
   <SALCommand>
     <Subsystem>Electrometer</Subsystem>
@@ -99,6 +106,13 @@
       <Units>second</Units>
       <Count>1</Count>
     </item>
+    <item>
+      <EFDB_Name>groupId</EFDB_Name>
+      <Description>Optional group ID for the electrometer reading.</Description>
+      <IDL_Type>string</IDL_Type>
+      <Units>unitless</Units>
+      <Count>1</Count>
+    </item>
   </SALCommand>
   <SALCommand>
     <Subsystem>Electrometer</Subsystem>
diff --git a/python/lsst/ts/xml/data/sal_interfaces/FiberSpectrograph/FiberSpectrograph_Commands.xml b/python/lsst/ts/xml/data/sal_interfaces/FiberSpectrograph/FiberSpectrograph_Commands.xml
index 5bdcde6ba..7a2c78a58 100644
--- a/python/lsst/ts/xml/data/sal_interfaces/FiberSpectrograph/FiberSpectrograph_Commands.xml
+++ b/python/lsst/ts/xml/data/sal_interfaces/FiberSpectrograph/FiberSpectrograph_Commands.xml
@@ -35,6 +35,13 @@
       <Units>unitless</Units>
       <Count>1</Count>
     </item>
+    <item>
+      <EFDB_Name>groupId</EFDB_Name>
+      <Description>Optional group ID for the exposure; used for the FITS GROUPID header value.</Description>
+      <IDL_Type>string</IDL_Type>
+      <Units>unitless</Units>
+      <Count>1</Count>
+    </item>
   </SALCommand>
   <SALCommand>
     <Subsystem>FiberSpectrograph</Subsystem>