Photo Head Replacement

I need a Photoshop expert to replace a head in a picture with one from another photo. The final image should be high quality, with a focus on retaining the original lighting and shading, as well as background consistency.

Requirements:
- Use a head from another photo
- Retain lighting and shading
- Maintain background consistency
- Medium resolution source images
- High-quality final output

Ideal Skills and Experience:
- Proficiency in Adobe Photoshop
- Experience with photo manipulation and head replacement
- Attention to detail
- Ability to work with medium resolution images