Quality Backlink Building

I'm seeking an experienced freelancer to build quality backlinks for my construction and civil engineering website. This is not a full SEO service; I only need high-authority, relevant backlinks to improve my Google ranking.

Requirements:
- White-hat techniques
- Manually created links
- Preferably do-follow
- Mix of backlink types:
- Guest posts
- Profile links
- Niche-related sources

Preferred sources:
- Industry blogs
- Professional forums
- Trade association sites

Ideal Skills:
- Proven backlink building experience
- Strong network in the construction and civil engineering niche
- Knowledge of high-authority websites in my industry

Please share your experience and the types of backlinks you can offer.