Laravel Upgrade Specialist Needed

I need to upgrade my Laravel application from version 5.8 to version 11. It's crucial that this upgrade does not result in any loss of files or disruption to the existing site.

Key Requirements:
- Maintain site integrity throughout the upgrade.
- Expertise in handling Laravel upgrades, especially with customizations.
- Ideally, you should have experience with Laravel 11 and knowledge of potential breaking changes from 5.8 to 11.
- Ability to identify and ensure compatibility of third-party packages and dependencies.

Ideal Skills:
- Strong Laravel experience
- Familiarity with version upgrades and migration processes
- Experience with custom Laravel applications and their unique features

Please share your approach and any relevant experience.