Photo Manipulation: Person Swap

I need a skilled photo editor to replace one person in a photo with another person from a different photo. The final image should look realistic, as if the new person was always there.

Requirements:
- Remove one person from the original photo.
- Add a different person from a separate photo.
- Ensure the new person has a smiling expression.
- The final image should be realistic and seamless.

Ideal skills and experience:
- Proficiency in photo editing software (e.g., Photoshop)
- Experience in realistic image manipulation
- Attention to detail
- Strong portfolio of similar work