Google Search Result Relegation

I'm currently confronted with damaging search results - appearing on the first page of google that I'd like to relegate to the third page or beyond. Despite identifying the detrimental search terms, I haven't yet employed any strategies or techniques to achieve this. I am seeking a specialist with a strong grounding in:

• Search Engine Optimization techniques
• Online reputation management
• Content creation and marketing

The objective is to douse the damaging search result's visibility and regain control over my online reputation. So, experience in this domain is crucial.