Realistic Face Swap for Xmas Photos

I need a skilled photo editor to swap one child's face for another on two high-resolution Christmas photos.Its the same kid. Just he is smiling in one photo, and not the other. I’d like to take his smiling face and move it to the other photo where he is not smiling. I’d like to try his smiling face to maybe 2 or 3 other photos. If possible. If not, one will do.

Requirements:
- Realistic and natural outcome
- High-resolution photos provided
- Similar lighting and skin tones

Ideal Skills:
- Proficient in Photoshop or similar software
- Experience with face swapping and photo retouching
- Attention to detail and ability to create natural-looking edits

Please include samples of previous work with your bid.