diff --git a/bin/benchpark b/bin/benchpark
index a5359a2e9..b900b4cb7 100755
--- a/bin/benchpark
+++ b/bin/benchpark
@@ -73,7 +73,7 @@ def source_location():
 
 def benchpark_list(subparsers, actions_dict):
     list_parser = subparsers.add_parser(
-        "list", help="List available benchmarks and systems"
+        "list", help="List available experiments, systems, and modifiers"
     )
     list_parser.add_argument("sublist", nargs="?")
     actions_dict["list"] = benchpark_list_handler
@@ -84,8 +84,7 @@ def benchpark_benchmarks():
     benchmarks = []
     experiments_dir = source_dir / "experiments"
     for x in os.listdir(experiments_dir):
-        for y in os.listdir(experiments_dir / x):
-            benchmarks.append(f"{x}/{y}")
+        benchmarks.append(f"{x}")
     return benchmarks
 
 
@@ -94,7 +93,8 @@ def benchpark_experiments():
     experiments = []
     experiments_dir = source_dir / "experiments"
     for x in os.listdir(experiments_dir):
-        experiments.append(f"{x}")
+        for y in os.listdir(experiments_dir / x):
+            experiments.append(f"{x}/{y}")
     return experiments
 
 
@@ -106,6 +106,14 @@ def benchpark_systems():
     return systems
 
 
+def benchpark_modifiers():
+    source_dir = source_location()
+    modifiers = []
+    for x in os.listdir(source_dir / "modifiers"):
+        modifiers.append(x)
+    return modifiers
+
+
 def benchpark_get_tags():
     f = source_location() / "tags.yaml"
     tags = []
@@ -132,36 +140,44 @@ def benchpark_list_handler(args):
     source_dir = source_location()
     sublist = args.sublist
     benchmarks = benchpark_benchmarks()
+    experiments = benchpark_experiments()
     systems = benchpark_systems()
+    modifiers = benchpark_modifiers()
 
     if sublist == None:
-        print("Benchmarks/ProgrammingModel:")
+        print("Experiments:")
+        for experiment in experiments:
+            print(f"\t{experiment}")
+        print("Systems:")
+        for system in systems:
+            print(f"\t{system}")
+    elif sublist == "benchmarks":
+        print("Benchmarks:")
         for benchmark in benchmarks:
             print(f"\t{benchmark}")
+    elif sublist == "experiments":
+        print("Experiments:")
+        for experiment in experiments:
+            print(f"\t{experiment}")
+    elif sublist == "systems":
         print("Systems:")
         for system in systems:
             print(f"\t{system}")
+    elif sublist == "modifiers":
+        print("Modifiers:")
+        for modifier in modifiers:
+            print(f"\t{modifier}")
     else:
-        if sublist == "benchmarks":
-            print("Benchmarks:")
-            for benchmark in benchmarks:
-                print(f"\t{benchmark}")
-        else:
-            if sublist == "systems":
-                print("Systems:")
-                for system in systems:
-                    print(f"\t{system}")
-            else:
-                raise ValueError(
-                    f'Invalid benchpark list "{sublist}" - must choose [benchmarks], [systems], or leave empty'
-                )
+        raise ValueError(
+            f'Invalid benchpark list "{sublist}" - must choose [experiments], [systems], [modifiers] or leave empty'
+        )
 
 
 def benchpark_check_benchmark(arg_str):
     benchmarks = benchpark_benchmarks()
     found = arg_str in benchmarks
     if not found:
-        out_str = f'Invalid benchmark/experiment "{arg_str}" - must choose one of: '
+        out_str = f'Invalid benchmark "{arg_str}" - must choose one of: '
         for benchmark in benchmarks:
             out_str += f"\n\t{benchmark}"
         raise ValueError(out_str)
@@ -172,7 +188,7 @@ def benchpark_check_experiment(arg_str):
     experiments = benchpark_experiments()
     found = arg_str in experiments
     if not found:
-        out_str = f'Invalid benchmark/experiment "{arg_str}" - must choose one of: '
+        out_str = f'Invalid experiment (benchmark/ProgrammingModel) "{arg_str}" - must choose one of: '
         for experiment in experiments:
             out_str += f"\n\t{experiment}"
         raise ValueError(out_str)
@@ -201,13 +217,26 @@ def benchpark_check_tag(arg_str):
     return found
 
 
+def benchpark_check_modifier(arg_str):
+    modifiers = benchpark_modifiers()
+    found = arg_str in modifiers
+    if not found:
+        out_str = f'Invalid modifier "{arg_str}" - must choose one of: '
+        for modifier in modifiers:
+            out_str += f"\n\t{modifier}"
+        raise ValueError(out_str)
+    return found
+
+
 def benchpark_setup(subparsers, actions_dict):
     create_parser = subparsers.add_parser(
         "setup", help="Set up an experiment and prepare it to build/run"
     )
 
     create_parser.add_argument(
-        "benchmark", type=str, help="The experiment (benchmark/ProgrammingModel) to run"
+        "experiment",
+        type=str,
+        help="The experiment (benchmark/ProgrammingModel) to run",
     )
     create_parser.add_argument(
         "system", type=str, help="The system on which to run the experiment"
@@ -311,32 +340,28 @@ def benchpark_setup_handler(args):
     experiments_root/
         spack/
         ramble/
-        <benchmark>/
+        <experiment>/
             <system>/
                 workspace/
                     configs/
                         (everything from source/configs/<system>)
-                        (everything from source/experiments/<benchmark>)
+                        (everything from source/experiments/<experiment>)
     """
 
-    benchmark = args.benchmark
+    experiment = args.experiment
     system = args.system
     experiments_root = pathlib.Path(os.path.abspath(args.experiments_root))
     modifier = args.modifier
     source_dir = source_location()
     debug_print(f"source_dir = {source_dir}")
-    debug_print(f"specified benchmark/ProgrammingModel = {benchmark}")
-    valid_benchmark = benchpark_check_benchmark(benchmark)
+    debug_print(f"specified experiment (benchmark/ProgrammingModel) = {experiment}")
+    valid_experiment = benchpark_check_experiment(experiment)
     debug_print(f"specified system = {system}")
     valid_system = benchpark_check_system(system)
-    if not (valid_benchmark and valid_system):
-        raise ValueError(
-            "Invalid benchmark/experiment and system provided: {0} {1}".format(
-                benchmark, system
-            )
-        )
+    debug_print(f"specified modifier = {modifier}")
+    valid_modifier = benchpark_check_modifier(modifier)
 
-    workspace_dir = experiments_root / str(benchmark) / str(system)
+    workspace_dir = experiments_root / str(experiment) / str(system)
 
     if workspace_dir.exists():
         if workspace_dir.is_dir():
@@ -360,7 +385,7 @@ def benchpark_setup_handler(args):
     print(f"Setting up configs for Ramble workspace {ramble_configs_dir}")
 
     configs_src_dir = source_dir / "configs" / str(system)
-    experiment_src_dir = source_dir / "experiments" / benchmark
+    experiment_src_dir = source_dir / "experiments" / experiment
     modifier_config_dir = source_dir / "modifiers" / modifier / "configs"
     ramble_configs_dir.mkdir(parents=True)
     ramble_logs_dir.mkdir(parents=True)
diff --git a/docs/3-opt-edit-experiment.rst b/docs/3-opt-edit-experiment.rst
index e35ca1758..59b4dd456 100644
--- a/docs/3-opt-edit-experiment.rst
+++ b/docs/3-opt-edit-experiment.rst
@@ -31,7 +31,7 @@ Benchpark configuration files are organized as follows::
      │  └── package.py 
      └── repo.yaml 
 
-You can edit any of them to change the behavior of your experiments.
+You can edit these configuration files to change the behavior of your experiments.
 
 System specification
 --------------------
@@ -54,3 +54,52 @@ If you would like to modify a specification of your benchmark,
 you can do so by upstreaming changes to Spack and/or Ramble,
 or working on your benchmark specification in ``benchpark/repo/${BENCHMARK}`` 
 (see :doc:`add-a-benchmark` for details).
+
+Modifiers
+---------
+In Benchpark, a ``modifier`` follows the `Ramble Modifier
+<https://googlecloudplatform.github.io/ramble/tutorials/10_using_modifiers.html#modifiers>`_
+and is an abstract object that can be applied to a large set of reproducible
+specifications. Modifiers are intended to encasulate reusable patterns that
+perform a specific configuration of an experiment. This may include injecting
+performance analysis or setting up system resources.
+
+Applying the Caliper modifier
+-----------------------------
+We have implemented a Caliper modifier to enable profiling of Caliper-instrumented 
+benchmarks in Benchpark. More documentation on Caliper can be found `here
+<https://software.llnl.gov/Caliper>`_.
+
+To turn on profiling with Caliper, add ``--modifier=<caliper_modifier>`` to the Benchpark
+setup step::
+
+    ./benchpark setup benchmark/programmingmodel system --modifier=<caliper_modifier> <workspace-dir>
+
+Valid values for ``<caliper_modifier>`` are found in the **Caliper Modifier**
+column of the table below.  Benchpark will link the experiment to Caliper,
+and inject appropriate Caliper configuration at runtime.  After the experiments 
+in the workspace have completed running, a ``.cali`` file
+is created which contains the collected performance metrics.
+
+.. list-table:: Available caliper modifiers
+   :widths: 20 20 50
+   :header-rows: 1
+
+   * - Caliper Modifier
+     - Where Applicable
+     - Metrics Collected
+   * - caliper
+     - Platform-independent
+     - | - Min time/rank: Minimum time (in seconds) across all ranks
+       | - Max time/rank: Maximum time (in seconds) across all ranks
+       | - Avg time/rank: Average time (in seconds) across all ranks
+       | - Total time: Aggregated time (in seconds) over all ranks
+   * - caliper-topdown
+     - x86 Intel CPUs
+     - | - Retiring
+       | - Bad speculation
+       | - Front end bound
+       | - Back end bound
+   * - caliper-cuda
+     - NVIDIA GPUs
+     - | - CUDA API functions (e.g., time.gpu)