diff --git a/README.md b/README.md
index c68c09a..ce75881 100644
--- a/README.md
+++ b/README.md
@@ -13,6 +13,7 @@ $drupalFinder = new \DrupalFinder\DrupalFinder(getcwd());
 $drupalRoot = $drupalFinder->getDrupalRoot();
 $composerRoot = $drupalFinder->getComposerRoot();
 $vendorDir = $drupalFinder->getVendorDir();
+$vendorBin = $drupalFinder->getVendorBin();
 ```
 
 ### Environment variables
@@ -23,12 +24,14 @@ values to determine the paths of the pertinent directories:
 - `DRUPAL_FINDER_DRUPAL_ROOT`
 - `DRUPAL_FINDER_COMPOSER_ROOT`
 - `DRUPAL_FINDER_VENDOR_DIR`
+- `DRUPAL_FINDER_VENDOR_DIR`
 
 For example:
 
 - `DRUPAL_FINDER_DRUPAL_ROOT=/var/www/web`
 - `DRUPAL_FINDER_COMPOSER_ROOT=/var/www`
 - `DRUPAL_FINDER_VENDOR_DIR=/var/www/vendor`
+- `DRUPAL_FINDER_VENDOR_BIN=/var/www/vendor/bin`
 
 This is useful for situations where you are containerizing an application,
 directories may be in odd places, or a composer.json might be missing since it
diff --git a/src/DrupalFinder.php b/src/DrupalFinder.php
index ffbcecd..36fb50c 100644
--- a/src/DrupalFinder.php
+++ b/src/DrupalFinder.php
@@ -24,6 +24,11 @@ class DrupalFinder
      */
     const ENV_VENDOR_DIR = 'DRUPAL_FINDER_VENDOR_DIR';
 
+    /**
+     * Vendor directory environment variable.
+     */
+    const ENV_VENDOR_BIN = 'DRUPAL_FINDER_VENDOR_BIN';
+
     /**
      * Drupal web public directory.
      *
@@ -47,6 +52,15 @@ class DrupalFinder
      */
     private $vendorDir;
 
+    /**
+     * Composer vendor bin directory.
+     *
+     * @var string
+     *
+     * @see https://getcomposer.org/doc/06-config.md#vendor-bin
+     */
+    private $vendorBin;
+
     /**
      * Initialize finder.
      *
@@ -64,6 +78,7 @@ public function __construct($start_path = null) {
         $this->drupalRoot = false;
         $this->composerRoot = false;
         $this->vendorDir = false;
+        $this->vendorBin = false;
 
         // If a starting path was provided, attempt to locate and set path
         // variables.
@@ -130,6 +145,18 @@ public function getVendorDir()
         return !empty($environment_path) ? $environment_path : $this->vendorDir;
     }
 
+    /**
+     * Get the vendor bin.
+     *
+     * @return string|bool
+     *   The path to the vendor bin, if it was found. False otherwise.
+     */
+    public function getVendorBin()
+    {
+        $environment_path = $this->getValidEnvironmentVariablePath(self::ENV_VENDOR_BIN);
+        return !empty($environment_path) ? $environment_path : $this->vendorBin;
+    }
+
     /**
      * Discover all valid paths.
      *
@@ -232,6 +259,18 @@ protected function findAndValidateRoots($path)
                 $this->vendorDir = $this->composerRoot . '/' . $json['config']['vendor-dir'];
             }
         }
+        if ($this->composerRoot && $this->vendorDir && file_exists($this->composerRoot . '/' . $this->getComposerFileName())) {
+            $json = json_decode(
+                file_get_contents($path . '/' . $this->getComposerFileName()),
+                true
+            );
+            if (is_array($json) && isset($json['config']['bin-dir'])) {
+                $this->vendorBin = $this->composerRoot . '/' . $json['config']['bin-dir'];
+            }
+            elseif ($this->vendorDir) {
+                $this->vendorBin = $this->vendorDir . '/bin';
+            }
+        }
 
         return $this->allPathsDiscovered();
     }
@@ -251,7 +290,7 @@ protected function getComposerFileName()
      *   True if all paths have been discovered, false if one or more haven't been found.
      */
     protected function allPathsDiscovered() {
-        return !empty($this->drupalRoot) && !empty($this->composerRoot) && !empty($this->vendorDir);
+        return !empty($this->drupalRoot) && !empty($this->composerRoot) && !empty($this->vendorDir) && !empty($this->vendorBin);
     }
 
     /**
@@ -261,7 +300,7 @@ protected function allPathsDiscovered() {
      *   True if all paths are known, false if one or more paths are unknown.
      */
     protected function allPathsKnown() {
-        return !empty($this->getDrupalRoot()) && !empty($this->getComposerRoot()) && !empty($this->getVendorDir());
+        return !empty($this->getDrupalRoot()) && !empty($this->getComposerRoot()) && !empty($this->getVendorDir())  && !empty($this->getVendorBin());
     }
 
     /**