diff --git a/optimizely/decision_service.py b/optimizely/decision_service.py
index 28275ef..7a81e0a 100644
--- a/optimizely/decision_service.py
+++ b/optimizely/decision_service.py
@@ -457,7 +457,8 @@ def get_variation(
             }
 
         # Check to see if user has a decision available for the given experiment
-        if user_profile_tracker is not None and not ignore_user_profile:
+        # Skip UPS for CMAB experiments as they require dynamic decisions
+        if user_profile_tracker is not None and not ignore_user_profile and not experiment.cmab:
             variation = self.get_stored_variation(project_config, experiment, user_profile_tracker.get_user_profile())
             if variation:
                 message = f'Returning previously activated variation ID "{variation}" of experiment ' \
@@ -472,6 +473,10 @@ def get_variation(
                 }
             else:
                 self.logger.warning('User profile has invalid format.')
+        elif experiment.cmab:
+            message = f'Skipping User Profile Service for CMAB experiment "{experiment.key}".'
+            self.logger.debug(message)
+            decide_reasons.append(message)
 
         # Check audience conditions
         audience_conditions = experiment.get_audience_conditions_or_ids()
@@ -529,7 +534,8 @@ def get_variation(
             self.logger.info(message)
             decide_reasons.append(message)
             # Store this new decision and return the variation for the user
-            if user_profile_tracker is not None and not ignore_user_profile:
+            # Skip UPS for CMAB experiments as they require dynamic decisions
+            if user_profile_tracker is not None and not ignore_user_profile and not experiment.cmab:
                 try:
                     user_profile_tracker.update_user_profile(experiment, variation)
                 except: