diff --git a/src/Parameters.ts b/src/Parameters.ts
index b0f32e3e..711ebc4e 100644
--- a/src/Parameters.ts
+++ b/src/Parameters.ts
@@ -13,5 +13,16 @@ export interface TelemetryParameters
 export interface RunnerParameters extends LoggerParameters, TelemetryParameters
 {
   workingDir: string;
+
+  // Directory containing unzipped Windows and Linux PAC Nuget Packages.
+  // Expectation is that, both versions have been renamed such that
+  // linux PAC executable's path is <runnersDir>/pac_linux/tools/pac
+  // and windows PAC executable's path is <runnersDir>\pac\tools\pac.exe
+  // This should be ignored in favor of pacPath if specified.
   runnersDir: string;
+
+  // Full path to pac.exe or pac (linux/mac) executable. Used instead of runnersDir if specified,
+  // for scenarios where PAC is installed in the pipeline instead of included in the
+  // ADO VSIX or GitHub tarball/zipball
+  pacPath?: string;
 }
diff --git a/src/pac/createPacRunner.ts b/src/pac/createPacRunner.ts
index b0744c98..4b15c948 100644
--- a/src/pac/createPacRunner.ts
+++ b/src/pac/createPacRunner.ts
@@ -3,11 +3,11 @@ import { resolve } from "path";
 import { CommandRunner, createCommandRunner } from "../CommandRunner";
 import { RunnerParameters } from "../Parameters";
 
-export default function createPacRunner({workingDir, runnersDir, logger, agent}: RunnerParameters): CommandRunner
+export default function createPacRunner({workingDir, runnersDir, pacPath, logger, agent}: RunnerParameters): CommandRunner
 {
   return createCommandRunner(
     workingDir,
-    platform() === "win32"
+    pacPath ?? platform() === "win32"
       ? resolve(runnersDir, "pac", "tools", "pac.exe")
       : resolve(runnersDir, "pac_linux", "tools", "pac"),
     logger,