Realistic Sci-Fi Robotic Illustrations

I'm seeking a talented illustrator to create realistic character and worldbuilding art for a science fiction setting, specifically focusing on robotic characters. These illustrations will be used for book covers and internal art.

Key Requirements:
- Realistic art style
- Focus on robotic character design
- Experience in sci-fi themes and environments
- Ability to create detailed, imaginative, and cohesive visuals

Ideal Skills and Experience:
- Strong portfolio in realistic and sci-fi illustrations
- Proficiency in digital painting and character design
- Attention to detail and creativity in worldbuilding
- Experience with book cover and internal art design

Please provide samples of similar work with your bid.