Competitor Forum Backlink Strategy

I need someone to create backlinks on my specified competitor websites. The primary goal is to lower their rankings.

Requirements:
- Expertise in SEO and backlink strategies
- Experience with forum posting and link creation
- Ability to work from a provided list of competitor sites

Ideal Skills:
- SEO knowledge
- Forum engagement experience
- Strategic thinking to effectively lower competitor rankings

Please share your relevant experience and approach.