Improve Google SEO & Domain Authority

I'm looking for an experienced SEO specialist to enhance my off-page SEO, specifically to improve my Google ranking and boost my domain authority.

Key Requirements:
- Focus primarily on off-page SEO
- Improve Google search results
- Enhance domain authority

Current Strategies:
- Backlink building
- Social media marketing

Ideal Skills and Experience:
- Proven track record in off-page SEO
- Strong expertise in backlink strategy
- Familiarity with social media's impact on SEO
- Knowledge of tools to measure and improve domain authority

Please provide a detailed plan and relevant experience.