diff --git a/pyproject.toml b/pyproject.toml
index 4fb00fa..7791e41 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -43,6 +43,7 @@ issues = "https://github.com/instructlab/eval/issues"
 "mt_bench" = "instructlab.eval.mt_bench:MTBenchEvaluator"
 "mt_bench_branch" = "instructlab.eval.mt_bench:MTBenchBranchEvaluator"
 "leaderboard_v2" = "instructlab.eval.leaderboard:LeaderboardV2Evaluator"
+"ruler" = "instructlab.eval.ruler:RulerEvaluator"
 
 [tool.setuptools_scm]
 version_file = "src/instructlab/eval/_version.py"
diff --git a/requirements-ruler.txt b/requirements-ruler.txt
new file mode 100644
index 0000000..50d9357
--- /dev/null
+++ b/requirements-ruler.txt
@@ -0,0 +1 @@
+lm-eval[ruler]>=0.4.8
\ No newline at end of file
diff --git a/src/instructlab/eval/ruler.py b/src/instructlab/eval/ruler.py
new file mode 100644
index 0000000..66b27b2
--- /dev/null
+++ b/src/instructlab/eval/ruler.py
@@ -0,0 +1,169 @@
+# Standard
+from typing import Any, Dict, List, Optional
+import json
+import os
+import pathlib
+
+# Third Party
+from lm_eval.evaluator import simple_evaluate
+
+# First Party
+from instructlab.eval.evaluator import Evaluator
+
+RULER_TASKS = [
+    "niah_single_1",
+    "niah_single_2",
+    "niah_single_3",
+    "niah_multikey_1",
+    "niah_multikey_2",
+    "niah_multikey_3",
+    "niah_multiquery",
+    "niah_multivalue",
+    "ruler_vt",
+    "ruler_cwe",
+    "ruler_fwe",
+    "ruler_qa_hotpot",
+    "ruler_qa_squad",
+]
+
+DEFAULT_MAX_LENGTH = 4096
+
+
+class RulerEvaluator(Evaluator):
+    """
+    Class definition for running RULER benchmarking tasks.
+    """
+
+    name = "ruler"
+
+    def __init__(
+        self,
+        model_path: Optional[str] = None,
+        output_file: Optional[str] = None,
+        tasks: list[str] = RULER_TASKS,
+        api_endpoint: Optional[str] = None,
+        max_length: Optional[int] = None,
+    ) -> None:
+        self.model_path = model_path
+        self.tasks = tasks
+        self.results: Dict[Any, Any] = {}
+        self.output_file = output_file
+
+        self.api_endpoint = api_endpoint or None
+        self.max_length = max_length or 4096
+
+    def save_to_file(self, output_file: Optional[str] = None) -> None:
+        """Save results to a JSON file"""
+        output_file = output_file if output_file else self.output_file
+        if not output_file:
+            raise ValueError("Output file path cannot be empty")
+
+        os.makedirs(os.path.dirname(output_file), exist_ok=True)
+        with open(output_file, "w", encoding="utf-8") as f:
+            json.dump(self.results, f, indent=2)
+
+    def process_lm_eval_results(
+        self,
+        fpath: Optional[pathlib.Path] = None,
+        raw_results: Optional[dict[str, Any]] = None,
+    ) -> dict[str, float]:
+        """
+        Process the evaluation results from lm_eval for the given file path and extract
+        aggregarted scores for each context length
+        Args:
+            fpath (pathlib.Path): The file path to the evaluation results.
+
+        """
+        unqiue_metrics_dict: dict[str, Any] = {}
+
+        # This is required because the lm_eval results are nested under 'ruler' if
+        # that is the supplied task to it. The output contains a nested dictionary
+        # in this case, using RULER tasks as the key. Each context length is a further subkey
+        # in the dictionary. There is an additional key per context length which also
+        # contains score adjusted for stderr, which we are ignoring here.
+        def extract_metrics(results: dict, unqiue_metrics_dict: dict = {}):
+            for k, v in results.items():
+                if isinstance(v, dict):
+                    extract_metrics(v, unqiue_metrics_dict)
+                else:
+                    if "stderr" not in k:
+                        metric = k.split(",")[0]
+                        if metric not in unqiue_metrics_dict:
+                            unqiue_metrics_dict[metric] = []
+                        unqiue_metrics_dict[metric].append(v)
+
+            return unqiue_metrics_dict
+
+        if fpath:
+            with open(fpath, "r", encoding="utf-8") as f:
+                raw_results = json.load(f)
+
+        if raw_results is not None:
+            extract_metrics(raw_results["results"], unqiue_metrics_dict)
+        unique_float_metrics = {}
+        # if value is list of floats, average the list
+        for k, v in unqiue_metrics_dict.items():
+            if isinstance(v, list) and all(isinstance(i, float) for i in v):
+                unique_float_metrics[k] = sum(v) / len(v)
+
+        # find average of all float values in dict
+        float_values = [
+            v for v in unique_float_metrics.values() if isinstance(v, float)
+        ]
+        if float_values:
+            unique_float_metrics["avg"] = sum(float_values) / len(float_values)
+        else:
+            unique_float_metrics["avg"] = 0.0
+
+        # result format
+        # {'8192': 0.90, '32768': 0.82, '65536': 0.77, '131072': 0.71, 'avg': 0.80}
+        return unique_float_metrics
+
+    def run(
+        self,
+        model_path: Optional[str] = None,
+        tasks: Optional[List[str]] = None,
+        output_file: Optional[str] = None,
+        api_endpoint: Optional[str] = None,
+        max_length: Optional[int] = DEFAULT_MAX_LENGTH,
+    ) -> None:
+        """
+        Run the RULER evaluation using the specified model and tasks.
+        """
+
+        model_path = self.model_path if model_path is None else model_path
+        tasks = self.tasks if not tasks else tasks
+        output_file = self.output_file if not output_file else output_file
+
+        # validate above params are not none and output file can be written to
+        if not model_path:
+            raise ValueError("Model path cannot be empty")
+        if not output_file:
+            raise ValueError("Output file path cannot be empty")
+        if not api_endpoint:
+            raise ValueError("API endpoint cannot be empty")
+
+        # Prepare model_args
+        model_args = {
+            "pretrained": model_path,
+            "base_url": api_endpoint,
+            "max_length": max_length,
+        }
+
+        self.lm_eval_results = simple_evaluate(
+            model="local-completions",
+            model_args=model_args,
+            tasks=tasks,
+        )
+
+        self.result = self.process_lm_eval_results(
+            raw_results=self.lm_eval_results,
+        )
+
+        # write results to file
+        if output_file:
+            try:
+                with open(output_file, "w", encoding="utf-8") as f:
+                    json.dump(self.result, f, indent=2)
+            except (OSError, IOError) as e:
+                raise ValueError(f"Failed to write to output file: {e}") from e
diff --git a/tests/test_project.py b/tests/test_project.py
index 46f863e..11ede21 100644
--- a/tests/test_project.py
+++ b/tests/test_project.py
@@ -7,6 +7,7 @@
 from instructlab.eval.leaderboard import LeaderboardV2Evaluator
 from instructlab.eval.mmlu import MMLUBranchEvaluator, MMLUEvaluator
 from instructlab.eval.mt_bench import MTBenchBranchEvaluator, MTBenchEvaluator
+from instructlab.eval.ruler import RulerEvaluator
 
 
 def test_evaluator_eps():
@@ -16,6 +17,7 @@ def test_evaluator_eps():
         "mt_bench": MTBenchEvaluator,
         "mt_bench_branch": MTBenchBranchEvaluator,
         "leaderboard_v2": LeaderboardV2Evaluator,
+        "ruler": RulerEvaluator,
     }
     eps = entry_points(group="instructlab.eval.evaluator")
     found = {}