diff --git a/examples/TEMPLATE.yml b/examples/TEMPLATE.yml
index c63114e365936f087de7897c95da5e1364fb69dd..11f5f8d4713176dadfcf546c8728ea30aaaafd2c 100755
--- a/examples/TEMPLATE.yml
+++ b/examples/TEMPLATE.yml
@@ -47,6 +47,10 @@ output_path: "./tmp_output"
 
 ### Horizontally concatenate input items into one long file; default = false
 # concatenate_input: true
+### Specify the concatenation order in a list of strings. If not specified, the concatenation order would be
+### as per the filesystem on the users' device
+### Should only be used if concatenate_input = true
+# concatenation_order: []
 ### Specify preamble duration in ms; default = 0
 # preamble: 40
 ### Flag wheter to use noise (amplitude +-4) for the preamble or silence; default = false (silence)
diff --git a/ivas_processing_scripts/__init__.py b/ivas_processing_scripts/__init__.py
index 6d48d5d56ebed59be9057442af9aaf9dd2b7e759..c2cdef0594b890c23299bfa41f056e46e6bfd091 100755
--- a/ivas_processing_scripts/__init__.py
+++ b/ivas_processing_scripts/__init__.py
@@ -47,6 +47,7 @@ from ivas_processing_scripts.processing.processing import (
     concat_teardown,
     preprocess,
     process_item,
+    reorder_items_list,
 )
 from ivas_processing_scripts.utils import DirManager, apply_func_parallel
 
@@ -92,6 +93,9 @@ def main(args):
         # set up logging
         logger = logging_init(args, cfg)
 
+        # Re-ordering items based on concatenation order
+        if cfg.concatenate_input and cfg.concatenation_order is not None:
+            cfg.items_list = reorder_items_list(cfg.items_list, cfg.concatenation_order)
         # check for ISM metadata
         if cfg.input["fmt"].startswith("ISM"):
             metadata = check_ISM_metadata(
diff --git a/ivas_processing_scripts/constants.py b/ivas_processing_scripts/constants.py
index ff56b9bf29e07358b4a7b52f335882784e174e7c..3c4cff910ea035c5bbf38fd3adb7f19a0674ef38 100755
--- a/ivas_processing_scripts/constants.py
+++ b/ivas_processing_scripts/constants.py
@@ -59,6 +59,7 @@ DEFAULT_CONFIG = {
     "multiprocessing": True,
     "delete_tmp": False,
     "concatenate_input": False,
+    "concatenation_order": None,
     "concat_silence": {
         "pre": 0,
         "post": 0,
diff --git a/ivas_processing_scripts/processing/processing.py b/ivas_processing_scripts/processing/processing.py
index 411f32790ccec7f379d1b97c3a9733d2ddf2976e..7b9a7f86632d2dad67a8708d304476afb2f6226a 100755
--- a/ivas_processing_scripts/processing/processing.py
+++ b/ivas_processing_scripts/processing/processing.py
@@ -59,7 +59,22 @@ class Processing(ABC):
         pass
 
 
+def reorder_items_list(items_list: list, concatenation_order: list) -> list:
+    name_to_full = {Path(full_file).name: full_file for full_file in items_list}
+    ordered_full_files = [
+        name_to_full[name] for name in concatenation_order if name in name_to_full
+    ]
+    return ordered_full_files
+
+
 def concat_setup(cfg: TestConfig, logger: logging.Logger):
+    n_items_list = len(cfg.items_list)
+    if cfg.concatenation_order is not None:
+        n_concatenation_order = len(cfg.concatenation_order)
+        if n_concatenation_order != n_items_list:
+            warn(
+                f"Warning: Mismatch in specified concatenation order and number of items to process!\nNumber of items specified in concatenation order: {n_concatenation_order}\nNumber of items in the directory: {n_items_list}\nConcatenation will use the following order:\n{cfg.concatenation_order}"
+            )
     if any([i for i in cfg.items_list if i.suffix == ".txt"]):
         raise SystemExit("Concatenation for text files is unsupported")