diff --git a/pkgs/development/python-modules/pysigma-backend-opensearch/default.nix b/pkgs/development/python-modules/pysigma-backend-opensearch/default.nix
new file mode 100644
index 000000000000..36e44c629855
--- /dev/null
+++ b/pkgs/development/python-modules/pysigma-backend-opensearch/default.nix
@@ -0,0 +1,55 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, poetry-core
+, pysigma
+, pysigma-backend-elasticsearch
+, pytestCheckHook
+, pythonOlder
+, requests
+}:
+
+buildPythonPackage rec {
+  pname = "pysigma-backend-opensearch";
+  version = "0.1.2";
+  format = "pyproject";
+
+  disabled = pythonOlder "3.8";
+
+  src = fetchFromGitHub {
+    owner = "SigmaHQ";
+    repo = "pySigma-backend-opensearch";
+    rev = "v${version}";
+    hash = "sha256-5+/LOi7GHu8h9WhjpZ7bBc4aM41NiXrSrdGhbXdYMvw=";
+  };
+
+  nativeBuildInputs = [
+    poetry-core
+  ];
+
+  propagatedBuildInputs = [
+    pysigma
+    pysigma-backend-elasticsearch
+  ];
+
+  checkInputs = [
+    pytestCheckHook
+    requests
+  ];
+
+  pythonImportsCheck = [
+    "sigma.backends.opensearch"
+  ];
+
+  disabledTests = [
+    # Tests requires network access
+    "test_connect_lucene"
+  ];
+
+  meta = with lib; {
+    description = "Library to support OpenSearch for pySigma";
+    homepage = "https://github.com/SigmaHQ/pySigma-backend-opensearch";
+    license = with licenses; [ lgpl21Only ];
+    maintainers = with maintainers; [ fab ];
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 5c831e4466b7..76ab4a8a7470 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -8198,6 +8198,8 @@ in {
 
   pysigma-backend-elasticsearch = callPackage ../development/python-modules/pysigma-backend-elasticsearch { };
 
+  pysigma-backend-opensearch = callPackage ../development/python-modules/pysigma-backend-opensearch { };
+
   pysigma-backend-splunk = callPackage ../development/python-modules/pysigma-backend-splunk { };
 
   pysigma-backend-insightidr = callPackage ../development/python-modules/pysigma-backend-insightidr { };