Modern Brand Kit Creation

I'm looking for a comprehensive brand kit for my new business. The brand kit should reflect a modern aesthetic.

Essential elements:
- Logo
- Letterhead
- PowerPoint presentation design

Additional elements (optional but preferred):
- Business cards
- Social media graphics
- Email signature

Ideal skills and experience:
- Strong graphic design skills
- Experience in creating cohesive brand identities
- Proficiency in designing for both print and digital platforms
- Portfolio showcasing modern design work

Please provide samples of previous work and a brief proposal.