diff --git a/config/rector/sets/cakephp60.php b/config/rector/sets/cakephp60.php
index 0aff07bd..6410f218 100644
--- a/config/rector/sets/cakephp60.php
+++ b/config/rector/sets/cakephp60.php
@@ -1,6 +1,7 @@
 <?php
 declare(strict_types=1);
 
+use Cake\Upgrade\Rector\Rector\MethodCall\EventManagerOnRector;
 use PHPStan\Type\ObjectType;
 use Rector\Config\RectorConfig;
 use Rector\Renaming\Rector\MethodCall\RenameMethodRector;
@@ -16,6 +17,8 @@
 
 # @see https://book.cakephp.org/6/en/appendices/6-0-migration-guide.html
 return static function (RectorConfig $rectorConfig): void {
+    // EventManager::on() signature change
+    $rectorConfig->rule(EventManagerOnRector::class);
 
     // Changes related to the accessible => patchable rename
     $rectorConfig->ruleWithConfiguration(RenameMethodRector::class, [
diff --git a/src/Rector/Rector/MethodCall/EventManagerOnRector.php b/src/Rector/Rector/MethodCall/EventManagerOnRector.php
new file mode 100644
index 00000000..18ced45e
--- /dev/null
+++ b/src/Rector/Rector/MethodCall/EventManagerOnRector.php
@@ -0,0 +1,75 @@
+<?php
+declare(strict_types=1);
+
+namespace Cake\Upgrade\Rector\Rector\MethodCall;
+
+use PhpParser\Node;
+use PhpParser\Node\Expr\MethodCall;
+use PHPStan\Type\ObjectType;
+use Rector\Rector\AbstractRector;
+use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample;
+use Symplify\RuleDocGenerator\ValueObject\RuleDefinition;
+
+/**
+ * Swaps the 2nd and 3rd arguments of EventManagerInterface::on() when called with 3 arguments.
+ *
+ * @see \Cake\Upgrade\Test\TestCase\Rector\MethodCall\EventManagerOnRector\EventManagerOnRectorTest
+ */
+final class EventManagerOnRector extends AbstractRector
+{
+    public function getRuleDefinition(): RuleDefinition
+    {
+        return new RuleDefinition(
+            'Swaps the 2nd and 3rd arguments of EventManagerInterface::on() to match new signature',
+            [
+                new CodeSample(
+                    <<<'CODE_SAMPLE'
+$eventManager->on('Model.beforeSave', ['priority' => 90], $callable);
+CODE_SAMPLE
+                    ,
+                    <<<'CODE_SAMPLE'
+$eventManager->on('Model.beforeSave', $callable, ['priority' => 90]);
+CODE_SAMPLE,
+                ),
+            ],
+        );
+    }
+
+    /**
+     * @return array<class-string<\PhpParser\Node>>
+     */
+    public function getNodeTypes(): array
+    {
+        return [MethodCall::class];
+    }
+
+    /**
+     * @param \PhpParser\Node\Expr\MethodCall $node
+     */
+    public function refactor(Node $node): ?Node
+    {
+        // Check if this is a call to the 'on' method
+        if (!$this->isName($node->name, 'on')) {
+            return null;
+        }
+
+        // Check if the object implements EventManagerInterface
+        if (!$this->isObjectType($node->var, new ObjectType('Cake\Event\EventManagerInterface'))) {
+            return null;
+        }
+
+        // Only process if there are exactly 3 arguments
+        if (count($node->args) !== 3) {
+            return null;
+        }
+
+        // Swap the 2nd and 3rd arguments
+        $secondArg = $node->args[1];
+        $thirdArg = $node->args[2];
+
+        $node->args[1] = $thirdArg;
+        $node->args[2] = $secondArg;
+
+        return $node;
+    }
+}
diff --git a/tests/TestCase/Rector/MethodCall/EventManagerOnRector/EventManagerOnRectorTest.php b/tests/TestCase/Rector/MethodCall/EventManagerOnRector/EventManagerOnRectorTest.php
new file mode 100644
index 00000000..074c8dcf
--- /dev/null
+++ b/tests/TestCase/Rector/MethodCall/EventManagerOnRector/EventManagerOnRectorTest.php
@@ -0,0 +1,28 @@
+<?php
+declare(strict_types=1);
+
+namespace Cake\Upgrade\Test\TestCase\Rector\MethodCall\EventManagerOnRector;
+
+use Iterator;
+use Rector\Testing\PHPUnit\AbstractRectorTestCase;
+
+final class EventManagerOnRectorTest extends AbstractRectorTestCase
+{
+    /**
+     * @dataProvider provideData()
+     */
+    public function test(string $filePath): void
+    {
+        $this->doTestFile($filePath);
+    }
+
+    public static function provideData(): Iterator
+    {
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixture');
+    }
+
+    public function provideConfigFilePath(): string
+    {
+        return __DIR__ . '/config/configured_rule.php';
+    }
+}
diff --git a/tests/TestCase/Rector/MethodCall/EventManagerOnRector/Fixture/fixture.php.inc b/tests/TestCase/Rector/MethodCall/EventManagerOnRector/Fixture/fixture.php.inc
new file mode 100644
index 00000000..71ef3bd2
--- /dev/null
+++ b/tests/TestCase/Rector/MethodCall/EventManagerOnRector/Fixture/fixture.php.inc
@@ -0,0 +1,67 @@
+<?php
+
+namespace Cake\Upgrade\Test\TestCase\Rector\MethodCall\EventManagerOnRector\Fixture;
+
+use Cake\Event\EventManager;
+
+class Fixture
+{
+    public function run()
+    {
+        $eventManager = EventManager::instance();
+        
+        // Should be transformed - 3 arguments with array literal
+        $eventManager->on('Model.beforeSave', ['priority' => 90], $callable);
+        
+        // Should be transformed - 3 arguments with different options
+        $eventManager->on('Controller.initialize', ['priority' => 10], function () {
+            return true;
+        });
+        
+        // Should NOT be transformed - 2 arguments
+        $eventManager->on('Model.afterSave', $callable);
+        
+        // Should NOT be transformed - 1 argument
+        $eventManager->on('Model.afterDelete');
+        
+        // Should be transformed - 3 arguments with variable
+        $options = ['priority' => 100];
+        $eventManager->on('Model.beforeFind', $options, $handler);
+    }
+}
+
+?>
+-----
+<?php
+
+namespace Cake\Upgrade\Test\TestCase\Rector\MethodCall\EventManagerOnRector\Fixture;
+
+use Cake\Event\EventManager;
+
+class Fixture
+{
+    public function run()
+    {
+        $eventManager = EventManager::instance();
+        
+        // Should be transformed - 3 arguments with array literal
+        $eventManager->on('Model.beforeSave', $callable, ['priority' => 90]);
+        
+        // Should be transformed - 3 arguments with different options
+        $eventManager->on('Controller.initialize', function () {
+            return true;
+        }, ['priority' => 10]);
+        
+        // Should NOT be transformed - 2 arguments
+        $eventManager->on('Model.afterSave', $callable);
+        
+        // Should NOT be transformed - 1 argument
+        $eventManager->on('Model.afterDelete');
+        
+        // Should be transformed - 3 arguments with variable
+        $options = ['priority' => 100];
+        $eventManager->on('Model.beforeFind', $handler, $options);
+    }
+}
+
+?>
diff --git a/tests/TestCase/Rector/MethodCall/EventManagerOnRector/config/configured_rule.php b/tests/TestCase/Rector/MethodCall/EventManagerOnRector/config/configured_rule.php
new file mode 100644
index 00000000..84e5dd29
--- /dev/null
+++ b/tests/TestCase/Rector/MethodCall/EventManagerOnRector/config/configured_rule.php
@@ -0,0 +1,9 @@
+<?php
+declare(strict_types=1);
+
+use Cake\Upgrade\Rector\Rector\MethodCall\EventManagerOnRector;
+use Rector\Config\RectorConfig;
+
+return static function (RectorConfig $rectorConfig): void {
+    $rectorConfig->rule(EventManagerOnRector::class);
+};