Photo Editing: Replace Son with Friend

I need a skilled Photoshop professional to help me modify a photo.

Requirements:
- Remove my son from the photo with the WWE superstar
- Replace my son with his friend from another photo I will provide.

The photo has a complex/mixed background, so the editing needs to be seamless and convincing.

Ideal skills and experience:
- Excellent photo editing and retouching skills
- Proficiency in Adobe Photoshop
- Experience with complex background editing
- Attention to detail to ensure a natural looking replacement

Please provide examples of similar work you have done in the past. Thank you!