Modern Minimalist Certificate Design

I'm looking for a professional designer to create a sleek, modern and minimalistic certificate for a professional test. The certificate should incorporate a few essential elements: the company logo, a designated signature space, and the date of achievement.

Ideal Skills:
- Graphic Design
- Adobe Illustrator
- Branding

The final deliverable should be an editable file, such as AI or PSD, so I can make future adjustments if necessary.

Please provide a portfolio of similar work if available.